iPC400 & iPC402 User Manual

01 / Overview

About this manual

This guide covers the Roboticsys iPC400 and iPC402 systems. Their shared motherboard is referred to here as the iPC400-MB. Some board features described in the BIOS or connector references may not be exposed or enabled in every system configuration.

Use the product-specific system information below for chassis dimensions, power, cooling, and expansion limits. If a procedure or setting differs from the hardware or BIOS version in your system, stop and contact RSI support before proceeding.

Introduction and scope

This manual brings together the system installation guide and the technical reference for the shared iPC400-MB platform. It is intended to help engineers and technicians install, configure, and service iPC400/iPC402 systems. The board reference also describes configurations and interfaces that may not be fitted to these systems; system-specific specifications and approved configurations govern use.

Document notices

Product specifications, illustrations, and firmware settings may change without prior notice. Values in the board reference describe the documented board platform and are provided for technical reference. They do not guarantee that an option is fitted, enabled, or supported in every assembled system. Confirm current system details with RSI before ordering components or changing a configuration.

This RSI manual is a system-level adaptation of the supplied reference documents. Board references use the name iPC400-MB; system drawings and procedures apply to the iPC400/iPC402 family. Board-only warranty, conformity, packaging, and accessory information do not establish terms for the assembled system.

The supplied board reference includes a copyright notice and states that commercial copying, translation, or other reproduction requires prior approval from its publisher. This system guide adapts the technical information for iPC400/iPC402 service and support.

Safety, battery, and handling

• Disconnect the DC power supply before opening the system or installing a component. Use a correctly rated RSI-approved power source.
• Use an ESD strap and grounded work surface. Keep replacement components in anti-static packaging until installation; hold circuit boards by their edges and do not bend them.
• Use the correct screws and tools, avoid overtightening, and keep small hardware clear of the board. Disconnect delicate cables by their connector, without pulling on wires or using pliers.
• Replace the RTC battery only with the same approved type and polarity. Do not recharge, crush, cut, heat, or incinerate the battery. Avoid very high temperatures and very low air pressure, which can cause rupture or leakage. Follow local rules for battery disposal.

RTC battery warnings

• Incorrect replacement: use only the specified battery type. An incorrect replacement may bypass safety protections, especially with some lithium batteries.
• Unsafe disposal: do not dispose of a battery in fire or a hot oven, and do not mechanically crush or cut it. These actions can cause an explosion.
• High temperatures: exposure to very high temperatures can cause an explosion or leakage of flammable liquid or gas.
• Low air pressure: very low air pressure can cause an explosion or leakage of flammable substances.

iPC400/iPC402 system warranty

RSI provides a three-year warranty for iPC400/iPC402 systems, excluding memory and storage.

Board conformity reference

The board guide lists CE and FCC Class B conformity. Its datasheet also lists RoHS and UKCA. These board references do not replace the compliance labeling and records supplied for the assembled iPC400/iPC402.

Board package contents and optional accessories

The supplied manual and datasheet contain separate packing lists, both shown in the board reference table below. The datasheet includes an additional backplate. Optional accessories are listed separately. These are bare-board references, not a statement of the assembled iPC400/iPC402 carton contents.

02 / Specifications

Board specifications

This table follows the board reference specification on page 6 of the 2024 PDF. Processor options and interface counts describe board variants; use the assembled-system information below where it differs.

Published processor options

The table below preserves the 2024 board-reference values. For current system choices, the CPU configurator compares 81 supported CPUs across 12th–15th Gen Intel families by core and thread count, power, performance, clock speed, DDR5 support, and lifecycle. Applicable fan-kit requirements are flagged there. Browse and filter the full CPU list.

The supplied iPC400 system manual also lists these 14th Gen options: Core i9-14900 / i9-14900T, i7-14700 / i7-14700T, i5-14500 / i5-14400 / i5-14500T, and i3-14100 / i3-14100T. The CPU configurator shows current supported selections.

Assembled system notes

These iPC400/iPC402 system details complement the board reference. Check the installed configuration and current product information before service or expansion.

Chassis dimensions and weight

Optional external fan kit

03 / Connections

External connections

Connector availability can vary with ordered options. Match the port on your system to its function below.

Internal expansion

• M.2 storage: Two M.2 2280 M-key sockets are listed for the iPC400-MB. Access requires opening the chassis and removing the heatsink assembly.
• M.2 wireless: One M.2 2230 E-key socket is listed for wireless expansion. Antenna mounting holes are provided in the chassis.
• PCI Express: The iPC402 provides two PCIe Gen5 slots. Total add-in card power is limited to 75 W across both cards, and the maximum card length is 180 mm. The iPC400 does not include these slots.
• 2.5-inch storage: One tray supports a 7 mm HDD or SSD.

04 / BIOS setup

Enter BIOS setup

Connect a keyboard and press Delete during system startup to open BIOS setup.

Manual revision: October 1, 2025. The supplied iPC400-MB board reference is revision 2024. The Main tab project label is adapted to “iPC400-MB” for this RSI guide; remaining sample screen values follow the reference and vary by installed configuration.

Keyboard controls

Common BIOS areas

BIOS setting reference

The list below transcribes the setting names and choices documented for the board firmware. Options shown in firmware can vary by BIOS revision and installed system configuration. A listed choice is not a recommendation to change it.

If ONLY the Administrator's password is set,
then this only limits access to Setup and is
only asked for when entering Setup.
If ONLY the User's password is set, then this
is a power on password and must be entered to
boot or enter Setup. In Setup the User will
have Administrator rights.
The password length must be
in the following range:

Main tab system summary

In addition to date and time, the Main tab can show firmware versions, processor model and stepping, processor power and cache, core and thread counts, memory configuration and voltage, firmware mode, and network addresses. Those values identify the installed build and change with the processor, memory, firmware, and network hardware.

05 / Installation & service

Internal component service

Appendix: ESD and handling precautions

Before removing the heatsink or handling internal components:

• Disconnect power before installation or service, and use the correct AC input voltage for the power supply.
• Ground yourself with an ESD strap and anti-static mat. Leave components in anti-static packaging until ready to install.
• Hold boards by their edges. Avoid touching chips or contacts, and do not bend or flex circuit boards.
• Use the correct hardware and avoid overtightening. Keep screws and parts organized on a clean, stable work surface.
• Use adequate lighting and suitable tools: Phillips screwdriver, small precision screwdriver for M.2, ESD grounding strap, and anti-static mat or pad.
• Disconnect cables by their connectors. Do not pull on wires or use pliers on delicate connectors.

Remove and reinstall the heatsink

Removing the heatsink provides access to memory, M.2 sockets, and the CMOS battery. This procedure exposes internal components and should be performed by qualified personnel.

1. Power down the device and disconnect DC power. Follow the ESD and handling precautions above.
2. Remove the four screws securing the aluminum heatsink.
3. Remove the four screws securing the bottom plate, as shown below.

1. Lift the heatsink carefully, starting at the bottom-plate end. Keep thermal material from contacting the motherboard.
2. Inspect the CPU riser-block channels. If thermal paste must be reapplied, the source system manual recommends Laird Tgel 600 A18745-09 and shows paste on both sidewalls of both channels.

1. When reinstalling, align the heatpipes with the CPU riser-block channels. With the bottom plate removed, guide the heatsink while viewing through the bottom to check alignment.
2. Once the heatsink is fully seated, reinstall its four screws and the four bottom-plate screws.

Install an M.2 module

1. Remove the heatsink using the procedure above.
2. Locate the M.2 connection on iPC400-MB. Insert the compatible card into the appropriate socket at a 30-degree angle.
3. Press the card down and secure it with the provided screw.
4. Reinstall the heatsink using the alignment procedure above.

Install a PCIe card in the iPC402

1. Power off the system. Locate and remove the PCIe expansion cover and its five screws.
2. Locate and open the matching removable expansion slot on the front panel.
3. Remove the thumbscrew bracket cover.
4. Insert the PCIe device and confirm it is seated properly.
5. Use the provided screw to secure the device to the chassis.
6. Reinstall the thumbscrew bracket cover and access panel. Confirm the card stays within the 75 W combined power and 180 mm length limits.

Configure a storage RAID volume

1. Boot to BIOS setup.
2. Navigate to Chipset → System Agent Configuration → VMD Controller and set VMD to Enabled. Supported RAID modes are then displayed. Save and exit.
3. Reboot into BIOS and navigate to Advanced → Intel Rapid Storage Technology.
4. Create a RAID volume: name it, select the RAID mode, select the disks, and create the volume.
5. Save and exit. Back up important data before changing storage configuration.

06 / Troubleshooting

Startup beep codes

If the system emits a beep during startup, note the phase, number, and pattern. The codes below are listed in the system manual; they are firmware diagnostics and may require RSI support to interpret.

PEI beep codes

DXE beep codes

For support, provide the system model, serial number, BIOS version if available, and the exact beep pattern. Do not include passwords or other credentials.

07 / iPC400-MB reference

Motherboard connectors and headers

This inventory identifies motherboard connection points referenced by the board documentation. It separates external ports from internal service interfaces so the chassis remains the reference for customer-accessible connections.

Board dimensions

Board layout

Open full-size board layout

For a clear text reference, use the numbered connector list below. Red jumper labels are covered in Jumper settings.

Numbered connector and header list

The 44 entries follow the PDF's connector and header list across pages 10–11, with board designations shown before the descriptions. They are board-location references; they do not indicate that every item is fitted or externally accessible on every iPC400/iPC402 configuration. Use the designation to cross-reference the pinout tables below.

Jumper and Header List

Additional board reference details

This short list keeps board-only details that are not repeated in the board and system specifications above. Current iPC400/iPC402 configuration details take precedence for the assembled system.

Board-only package contents and optional accessories

The supplied board reference lists these items for a bare motherboard shipment. This list does not define the contents of an assembled iPC400/iPC402 system carton.

Jumper settings

The board reference lists four numbered jumper settings on pages 45–48. Disconnect system power before qualified service, and confirm the selected voltage or mode is appropriate before changing a jumper.

1. Display panel voltage jumper (JP_EDPPWR1)

The board reference shows +3.3 V as the default panel voltage. The eDP/LVDS panel header is not used by the standard chassis display connections. Do not change the jumper or connect a panel without RSI service approval.

Function	Bridge these pins
+3.3 V (default)	4–6
+5 V	2–4
+12 V	3–4

Pin(s)	Signal
1	N/C
2	+5 V
3	+12 V
4	VDD_LVDS1
5	N/C
6	+3.3 V

2. CMOS clear jumper (JP_CMOS1)

Default position retains CMOS data. Clearing CMOS resets firmware settings. Disconnect power first and use the system service procedure.

Function	Bridge these pins
Keep CMOS data (default)	1–2
Clear CMOS data	2–3

Pin(s)	Signal
1	+VBAT
2	RTC RESET#
3	GND

3. ATX/AT mode jumper (JP_PSON1)

The system is configured for its intended power mode at manufacture. Do not move this jumper.

Function	Bridge these pins
ATX mode (default)	2–3
AT mode	1–2

Pin(s)	Signal
1	AT selection
2	+VCC
3	ATX selection

4. COM1 power select jumper (JP_COM1PWR1)

Default is RI#. Selecting 5 V or 12 V changes the COM1 RI# pin electrical level. Confirm the connected device tolerates the selected voltage before changing it.

Function	Bridge these pins
RI# (default)	1–2
+5 V	3–4
+12 V	5–6

Pin(s)	Signal
1	COM1 RI#
2	Reserved
3	Reserved
4	+5 V
5	+12 V
6	Reserved

Connector and header pinouts

These entries follow the PDF’s numbered “Connector and Header List Description” (printed pages 12–44). Each includes its corresponding connector illustration; shared illustrations are used where the PDF shows one drawing for adjacent items. Pin assignments are included where provided by the PDF. Several connections are internal service interfaces. Disconnect power and confirm board orientation before qualified service.

1. Direct Current input connector (DCIN1)

The PDF lists this connector on printed page 12 but does not provide a separate pin-assignment table for item 1.

2. ATX12V1, 4-pin power header

Board-level power interface. The assembled-system DC jack is the customer power connection.

Pin	Signal	Pin	Signal
1	GND
2	GND
3	+12V
4	+12V

3. ATX12V2, 8-pin power header

Board-level power interface. Disconnect power before service.

Pin	Signal	Pin	Signal
1	GND	5	+12V
2	GND	6	+12V
3	GND	7	+12V
4	GND	8	+12V

4. USB32G2_1, four Type-A ports

The four connector groups A/B/C/D map to USB ports 1–2 and 7–8 in the source pin table.

Pin	Signal	Pin	Signal
A1	+5V	B1	+5V
A2	USB2_D1-	B2	USB2_D2-
A3	USB2_D1+	B3	USB2_D2+
A4	GND	B4	GND
A5	USB31_P1_z_RX-	B5	USB31_P2_z_RX-
A6	USB31_P1_z_RX+	B6	USB31_P2_z_RX+
A7	GND	B7	GND
A8	USB31_P1_z_TX-	B8	USB31_P2_z_TX-
A9	USB31_P1_z_TX+	B9	USB31_P2_z_TX+
C1	+5V	D1	+5V
C2	USB2_D7-	D2	USB2_D8-
C3	USB2_D7+	D3	USB2_D8+
C4	GND	D4	GND
C5	USB31_P7_z_RX-	D5	USB31_P8_z_RX-
C6	USB31_P7_z_RX+	D6	USB31_P8_z_RX+
C7	GND	D7	GND
C8	USB31_P7_z_TX-	D8	USB31_P8_z_TX-
C9	USB31_P7_z_TX+	D9	USB31_P8_z_TX+

5. USB32G2_2, four Type-A ports

The four connector groups A/B/C/D map to USB ports 3–4 and 9–10 in the source pin table.

Pin	Signal	Pin	Signal
A1	+5V	B1	+5V
A2	USB2_D3-	B2	USB2_D4-
A3	USB2_D3+	B3	USB2_D4+
A4	GND	B4	GND
A5	USB31_P3_z_RX-	B5	USB31_P4_z_RX-
A6	USB31_P3_z_RX+	B6	USB31_P4_z_RX+
A7	GND	B7	GND
A8	USB31_P3_z_TX-	B8	USB31_P4_z_TX-
A9	USB31_P3_z_TX+	B9	USB31_P4_z_TX+
C1	+5V	D1	+5V
C2	USB2_D9-	D2	USB2_D10-
C3	USB2_D9+	D3	USB2_D10+
C4	GND	D4	GND
C5	USB31_P9_z_RX-	D5	USB31_P10_z_RX-
C6	USB31_P9_z_RX+	D6	USB31_P10_z_RX+
C7	GND	D7	GND
C8	USB31_P9_z_TX-	D8	USB31_P10_z_TX-
C9	USB31_P9_z_TX+	D9	USB31_P10_z_TX+

6. LAN1, 1 GbE RJ45

Signal and LED contacts are shown as listed in the board reference.

Pin	Signal	Pin	Signal
R1	MDI_LAN1_P0	R6	LAN1_CT
R2	MDI_LAN1_N0	R7	MDI_LAN1_P2
R3	MDI_LAN1_P1	R8	MDI_LAN1_N2
R4	MDI_LAN1_N1	R9	MDI_LAN1_P3
R5	NC	R10	MDI_LAN1_N3
L1	LAN1_LED0_R_ACT#	L3	LAN1_LED1_R_1G#
L2	+V3.3_DUAL	L4	LAN1_LED2_R_100M#

7. LAN2, 2.5 GbE RJ45

Signal and LED contacts are shown as listed in the board reference.

Pin	Signal	Pin	Signal
R1	MDI_LAN2_P0	R6	LAN2_CT
R2	MDI_LAN2_N0	R7	MDI_LAN2_P2
R3	MDI_LAN2_P1	R8	MDI_LAN2_N2
R4	MDI_LAN2_N1	R9	MDI_LAN2_P3
R5	NC	R10	MDI_LAN2_N3
L1	LAN2_LED2_R_ACT#	L3	LAN2_LED1_R_2.5G#
L2	+V3.3_DUAL	L4	LAN2_LED0_R_1G#

8. LAN3, 2.5 GbE RJ45

The source section is titled LAN3 but its signal rows repeat LAN2 net labels. This table preserves those labels; verify the system board revision and silkscreen before using them.

Pin	Signal	Pin	Signal
R1	MDI_LAN2_P0	R6	LAN2_CT
R2	MDI_LAN2_N0	R7	MDI_LAN2_P2
R3	MDI_LAN2_P1	R8	MDI_LAN2_N2
R4	MDI_LAN2_N1	R9	MDI_LAN2_P3
R5	NC	R10	MDI_LAN2_N3
L1	LAN2_LED2_R_ACT#	L3	LAN2_LED1_R_2.5G#
L2	+V3.3_DUAL	L4	LAN2_LED0_R_1G#

9–10. HDMI1 and DP1 shared display connector

Board-level signal map for the combined display connector. The assembled chassis exposes separate HDMI and DisplayPort connectors.

Pin	Signal	Pin	Signal
P1	HDMI1_Z_D2+	P20	DP1_0+
P2	GND	P21	GND
P3	HDMI1_Z_D2-	P22	DP1_0-
P4	HDMI1_Z_D1+	P23	DP1_1+
P5	GND	P24	GND
P6	HDMI1_Z_D1-	P25	DP1_1-
P7	HDMI1_Z_D0+	P26	DP1_2+
P8	GND	P27	GND
P9	HDMI1_Z_D0-	P28	DP1_2-
P10	HDMI1_Z_CLK+	P29	DP1_3+
P11	GND	P30	GND
P12	HDMI1_Z_CLK-	P31	DP1_3-
P13	x	P32	DP1_AUX_EN#
P14	x	P33	GND
P15	HDMI1_SCL	P34	DP1_AUX+
P16	HDMI1_SDA	P35	GND
P17	GND	P36	DP1_AUX-
P18	+V5_HDMI1	P37	DP1_HPD
P19	HDMI1_HPD	P38	GND
		P39	+V3.3_DP1

11. LGA1700 CPU socket (CPU1)

The PDF shows the CPU socket illustration but does not provide a separate pin-assignment table for item 11.

12. Platform controller hub (PCH1)

The PDF shows the platform controller component drawings but does not provide a separate pin-assignment table for item 12.

13. Rear HD analog audio interface (AUDIO1)

Internal audio connections are for qualified system integration only.

Pin(s)	Signal
Green jack	Line-out
Pink jack	Microphone input

14. Rear line-out header (CN_REAR_LINE1)

Internal audio connection for qualified system integration only.

Pin(s)	Signal
1	Rear line-out L
2	Sense
3	GND
4	Rear line-out R

15. Rear microphone header (CN_REAR_MIC1)

Internal audio connection for qualified system integration only.

Pin(s)	Signal
1	Rear MIC-in L
2	GND
3	GND
4	Sense
5	Rear MIC-in R

16. Audio amplifier output connector (CN_AMP1)

These headers are not exposed as speaker outputs on the standard system chassis.

Pin(s)	Signal
1	Speaker R+
2	Speaker R−
3	Speaker L+
4	Speaker L−

17. Front HD analog audio interface (CN_FPAUD1)

Internal audio connection for qualified system integration only.

Pin(s)	Signal
1 / 2	MIC-in L / GND
3 / 4	MIC-in R / Front audio detect#
5 / 6	Line-out R / Sense R1
7 / 8	Sense / Key
9 / 10	Line-out L / Sense R2

18. M2M1, M.2 2280 M-key socket

Complete 75-contact board map. Socket wiring and supported modules are configuration-dependent; use pin 1/orientation marks and qualified service procedures.

Pin	Signal	Pin	Signal
1	GND_1	2	3p3V_1
3	GND_2	4	3p3V_2
5	PERN3	6	NC_1
7	PERP3	8	NC_2
9	GND_3	10	DAS/DSS-I/O/LED1-I-03p3V
11	PETN3	12	3p3V_3
13	PETP3	14	3p3V_4
15	GND_4	16	3p3V_5
17	PERN2	18	3p3V_6
19	PERP2	20	NC_3
21	GND_5	22	NC_4
23	PETN2	24	NC_5
25	PETP2	26	NC_6
27	GND_6	28	NC_7
29	PERN1	30	NC_8
31	PERP1	32	NC_9
33	GND_7	34	NC_10
35	PETN1	36	NC_11
37	PETP1	38	DEVSLP-O
39	GND_8	40	NC_12
41	PERN0/SATA-B+	42	NC_13
43	PERP0/SATA-B-	44	NC_14
45	GND_9	46	NC_15
47	PETN0/SATA-A-	48	NC_16
49	PETP0/SATA-A+	50	PERST-O-0/3p3V/NC
51	GND_10	52	CLKREQ-I/O-0/3p3V/NC
53	REFCLKN	54	PEWAKE-I/O-0/3p3V/NC
55	REFCLKP	56	NC_17
57	GND_11	58	NC_18
59	Connector KEY	60	Connector KEY
61	Connector KEY	62	Connector KEY
63	Connector KEY	64	Connector KEY
65	Connector KEY	66	Connector KEY
67	NC_19	68	SUSCLK-32KHZ-O-0/3p3V
69	PEDET-NC-PCIE/GND-SATA	70	3p3V_7
71	GND_12	72	3p3V_8
73	GND_13	74	3p3V_9
75	GND_14

19. M2M2, M.2 2280 M-key socket

Complete 75-contact board map. Socket wiring and supported modules are configuration-dependent; use pin 1/orientation marks and qualified service procedures.

Pin	Signal	Pin	Signal
1	GND_1	2	3p3V_1
3	GND_2	4	3p3V_2
5	PERN3	6	NC_1
7	PERP3	8	NC_2
9	GND_3	10	DAS/DSS-I/O/LED1-I-03p3V
11	PETN3	12	3p3V_3
13	PETP3	14	3p3V_4
15	GND_4	16	3p3V_5
17	PERN2	18	3p3V_6
19	PERP2	20	NC_3
21	GND_5	22	NC_4
23	PETN2	24	NC_5
25	PETP2	26	NC_6
27	GND_6	28	NC_7
29	PERN1	30	NC_8
31	PERP1	32	NC_9
33	GND_7	34	NC_10
35	PETN1	36	NC_11
37	PETP1	38	DEVSLP-O
39	GND_8	40	NC_12
41	PERN0	42	NC_13
43	PERP0	44	NC_14
45	GND_9	46	NC_15
47	PETN0	48	NC_16
49	PETP0	50	PERST-O-0/3p3V/NC
51	GND_10	52	CLKREQ-I/O-0/3p3V/NC
53	REFCLKN	54	PEWAKE-I/O-0/3p3V/NC
55	REFCLKP	56	NC_17
57	GND_11	58	NC_18
59	Connector KEY	60	Connector KEY
61	Connector KEY	62	Connector KEY
63	Connector KEY	64	Connector KEY
65	Connector KEY	66	Connector KEY
67	NC_19	68	SUSCLK-32KHZ-O-0/3p3V
69	PEDET-NC-PCIE/GND-SATA	70	3p3V_7
71	GND_12	72	3p3V_8
73	GND_13	74	3p3V_9
75	GND_14

20. M2E1, M.2 2230 E-key socket

Complete 75-contact board map. Socket wiring and supported modules are configuration-dependent; use pin 1/orientation marks and qualified service procedures.

Pin	Signal	Pin	Signal
1	GND	2	+3.3V
3	USB_D+	4	+3.3V
5	USB_D-	6	WiFi_LED# (I)(OD)
7	GND	8	I2S SCK (O/I)(0/1.8V)
9	NC	10	I2S WS (I/O)(0/1.8V)
11	NC	12	I2S SD_IN (I)(0/1.8V)
13	NC	14	I2S SD_OUT (O)(0/1.8V)
15	NC	16	BT_LED# (I)(OD)
17	NC	18	GND
19	NC	20	UART WAKE# (I)(0/3.3V)
21	NC	22	UART RXD (I)(0/1.8V)
23	NC	24	Connector KEY
25	Connector KEY	26	Connector KEY
27	Connector KEY	28	Connector KEY
29	Connector KEY	30	Connector KEY
31	Connector KEY	32	UART TXD
33	GND	34	UART CTS
35	PETp0	36	UART RTS
37	PETn0	38	NC
39	GND	40	NC
41	PERp0	42	NC
43	PERn0	44	COEX3
45	GND	46	COEX2
47	REFCLKp0	48	COEX1
49	REFCLKn0	50	SUSCLK(32kHz) (O)(0/3.3V)
51	GND	52	PERST0# (O)(0/3.3V)
53	CLKREQ0#	54	W_DISABLE2# (O)(0/3.3V)
55	PEWAKE0#	56	W_DISABLE1# (O)(0/3.3V)
57	GND	58	NC
59	NC	60	NC
61	NC	62	NC
63	GND	64	RESERVED
65	NC	66	RESERVED
67	NC	68	NC
69	GND	70	PCIE_WAKE#
71	NC	72	+3.3V
73	NC	74	+3.3V
75	GND

21. PCIEX16_1, PCIe expansion connector

Complete A/B contact map for the board expansion connector. iPC402 slot routing, power, and card limits are defined by the system configuration.

Pin	Signal	Pin	Signal
B1	+12V	A1	PRSNT1#
B2	+12V	A2	+12V
B3	+12V	A3	+12V
B4	GND	A4	GND
B5	SMB_CLK	A5	Reserved
B6	SMB_DATA	A6	Reserved
B7	GND	A7	Reserved
B8	+3.3V	A8	Reserved
B9	Reserved	A9	+3.3V
B10	+3.3VAUX	A10	+3.3V
B11	WAKE#	A11	PWRGD
B12	Reserved	A12	GND
B13	GND	A13	REFCLK+
B14	TX0+	A14	REFCLK-
B15	TX0-	A15	GND
B16	GND	A16	RX0+
B17	Reserved	A17	RX0-
B18	DETECT#	A18	GND
B19	TX1+	A19	Reserved
B20	TX1-	A20	GND
B21	GND	A21	RX1+
B22	GND	A22	RX1-
B23	TX2+	A23	GND
B24	TX2-	A24	GND
B25	GND	A25	RX2+
B26	GND	A26	RX2-
B27	TX3+	A27	GND
B28	TX3-	A28	GND
B29	GND	A29	RX3+
B30	Reserved	A30	RX3-
B31	Reserved	A31	GND
B32	GND	A32	Reserved
B33	TX4+	A33	Reserved
B34	TX4-	A34	GND
B35	GND	A35	RX4+
B36	GND	A36	RX4-
B37	TX5+	A37	GND
B38	TX5-	A38	GND
B39	GND	A39	RX5+
B40	GND	A40	RX5-
B41	TX6+	A41	GND
B42	TX6-	A42	GND
B43	GND	A43	RX6+
B44	GND	A44	RX6-
B45	TX7+	A45	GND
B46	TX7-	A46	GND
B47	GND	A47	RX7+
B48	Reserved	A48	RX7-
B49	GND	A49	GND
B50	TX8+	A50	Reserved
B51	TX8-	A51	GND
B52	GND	A52	RX8+
B53	GND	A53	RX8-
B54	TX9+	A54	GND
B55	TX9-	A55	GND
B56	GND	A56	RX9+
B57	GND	A57	RX9-
B58	TX10+	A58	GND
B59	TX10-	A59	GND
B60	GND	A60	RX10+
B61	GND	A61	RX10-
B62	TX11+	A62	GND
B63	TX11-	A63	GND
B64	GND	A64	RX11+
B65	GND	A65	RX11-
B66	TX12+	A66	GND
B67	TX12-	A67	GND
B68	GND	A68	RX12+
B69	GND	A69	RX12-
B70	TX13+	A70	GND
B71	TX13-	A71	GND
B72	GND	A72	RX13+
B73	GND	A73	RX13-
B74	TX14+	A74	GND
B75	TX14-	A75	GND
B76	GND	A76	RX14+
B77	GND	A77	RX14-
B78	TX15+	A78	GND
B79	TX15-	A79	GND
B80	GND	A80	RX15+
B81	Reserved	A81	RX15-
B82	Reserved	A82	GND

22. 8-bit GPIO header (CN_GPIO1)

GPIO direction is configured in BIOS. Confirm signal voltage and connected-device requirements before use.

Pin(s)	Signal
1 / 2	GPIO0 / GPIO4
3 / 4	GPIO1 / GPIO5
5 / 6	GPIO2 / GPIO6
7 / 8	GPIO3 / GPIO7
9 / 10	+VCC / GND

23. SMBus header (CN_SMBUS1; PDF pinout label CN_CPUSMB1)

The connector inventory calls this CN_SMBUS1, while the item 23 pinout page labels it CN_CPUSMB1. The source table does not clearly align all four pin numbers with the signal names, so verify the board marking or an authoritative pinout before wiring.

Pin(s)	Signal
Pin assignment	Source list: +3.3 V dual, GND, SMB_CLK, SMB_DAT. Exact pin-number mapping is unclear in the PDF.

24. CPU fan connector (CPUFAN1)

Verify the board marking and fan requirements before connecting.

Pin(s)	Signal
1	GND
2	Fan VCC
3	Fan speed
4	Fan PWM

25. System fan connectors (SYSFAN1 ~ 2)

Verify the board marking and fan requirements before connecting.

Pin(s)	Signal
1	GND
2	System fan VCC
3	System fan speed
4	System fan PWM

26. DDR5 SO-DIMM sockets 180° (DIMMA1, DIMMB1)

The PDF shows the socket illustration but does not provide a separate pin-assignment table for item 26.

27. DDR5 SO-DIMM socket 90°, 9.2 mm (DIMMA2)

The PDF shows this alternate socket footprint in a shared illustration with item 28; it is not an additional socket in the standard iPC400-MB configuration.

28. DDR5 SO-DIMM socket 90°, 5.2 mm (DIMMB2)

The PDF shows this alternate socket footprint in a shared illustration with item 27; it is not an additional socket in the standard iPC400-MB configuration.

29. EDP1, 40-pin embedded DisplayPort header

Board-level panel connector. It is not the external DisplayPort port on the assembled system. Do not connect a panel without RSI service approval.

Pin	Signal	Pin	Signal
1	GND	21	+VDD_EDP
2	GND	22	GND
3	EDP_TX3-	23	GND
4	EDP_TX3+	24	GND
5	GND	25	GND
6	EDP_TX2-	26	GND
7	EDP_TX2+	27	EDP_HPD
8	GND	28	GND
9	EDP_TX1-	29	GND
10	EDP_TX1+	30	GND
11	GND	31	GND
12	EDP_TX0-	32	EDP_ENBKL
13	EDDePf_iTnXit0i+on	33	EDP_DIMMING
14	GND	34	GND
15	EDP_AUX+	35	GND
16	EDP_AUX-	36	EDP_Inverter_Power
17	GND	37	EDP_Inverter_Power
18	+VDD_EDP	38	EDP_Inverter_Power
19	+VDD_EDP	39	EDP_Inverter_Power
20	+VDD_EDP	40	GND

30. Case-open detect header (CN_CASE1)

This input is available only if the system build includes a compatible case-open switch.

Pin(s)	Signal
1	Case Open
2	GND

31. COM3/COM4 internal header (CN_COM34)

Pin numbers refer to the 2-row internal header. COM3 and COM4 use RS-232 in the iPC400/iPC402 system specification.

Pin(s)	Signal
1 / 2	COM3 DCD# / COM3 DSR#
3 / 4	COM3 RXD / COM3 RST#
5 / 6	COM3 TXD / COM3 CTS#
7 / 8	COM3 DTR# / COM3 RI#
9 / 10	GND / GND
11 / 12	COM4 DCD# / COM4 DSR#
13 / 14	COM4 RXD / COM4 RST#
15 / 16	COM4 TXD / COM4 CTS#
17 / 18	COM4 DTR# / COM4 RI#
19 / 20	GND / GND

32. COM1/COM2 internal header (CN_COM12)

Pin numbers refer to the 2-row internal header. Use the board orientation marking when identifying pin 1.

Pin(s)	Signal
1 / 2	COM1 DCD# / COM1 DSR#
3 / 4	COM1 RXD / COM1 RST#
5 / 6	COM1 TXD / COM1 CTS#
7 / 8	COM1 DTR# / COM1 RI#
9 / 10	GND / GND
11 / 12	COM2 DCD# / COM2 DSR#
13 / 14	COM2 RXD / COM2 RST#
15 / 16	COM2 TXD / COM2 CTS#
17 / 18	COM2 DTR# / COM2 RI#
19 / 20	GND / GND

33. Front panel header (CN_FP1)

This is an internal system connection, not an external user port.

Pin(s)	Signal
1 / 3	HDD LED + / HDD LED −
2 / 4	Power LED + / Power LED −
5 / 7	System reset switch
6 / 8	Power switch
9	GND

34. SATA signal connector (SATA2)

Internal service connections. Match the cable and drive interface; never force a connector.

Pin(s)	Signal
1	GND
2	TX+
3	TX−
4	GND
5	RX−
6	RX+
7	GND

35. SATA signal connector with SATA DOM support (SATA1)

Internal service connection. Match the cable and drive interface; never force a connector.

Pin(s)	Signal
1	GND
2	TX+
3	TX−
4	GND
5	RX−
6	RX+
7	GND
8	+5 V, SATA DOM support

36. SPI firmware socket (BIOS1)

Service use only. Incorrect programming can prevent system startup and may require board replacement.

Pin(s)	Signal
1 / 2	CS# / MISO
3 / 4	WP# / IO2 / GND
5 / 6	MOSI / SCK
7 / 8	HOLD# / IO3 / +3.3 V dual

37. eSPI service header (CN_ESPI1)

Service use only. Not a customer expansion port.

Pin(s)	Signal
1 / 2	ESPI_IO1 / ESPI_CLK
3 / 4	ESPI_IO0 / ESPI_RST#
5 / 6	+3.3 V / ESPI_CS#
7 / 8	GND / ESPI_IO3
9 / 10	+3.3 V dual / ESPI_IO2

38. Out-of-band management header (CN_OOB1)

This 10-pin service header is shown in the board reference but is not a user interface on the standard iPC400/iPC402 system. Do not connect external equipment without RSI service direction.

Pin(s)	Signal
1	+V5_DUAL
2	OOB_Power Switch
3	OOB_Reset Switch
4	OOB_UART0_TX
5	OOB_UART0_RX
6	OOB_SML_CLK
7	OOB_SML_DAT
8	OOB_GPI
9	OOB_EVENT#
10	GND

39. SATA power headers (CN_SATAPWR1/2)

Internal power headers can damage components if miswired. Do not attach external devices.

Pin(s)	Signal
1 / 2 / 3 / 4	+12 V / GND / GND / +5 V

40. Standby power header (CN_V5SB_ATX1)

Internal power headers can damage components if miswired. Do not attach external devices.

Pin(s)	Signal
1 / 2 / 3	+5 V standby / GND / PS_ON#

41. USB 2.0 internal header (CN_USB2_1)

Internal header only. Confirm pin 1 and cable orientation before connecting.

Pin(s)	Signal
1 / 2	+5 V / +5 V
3 / 4	USB2 D7− / USB2 D8−
5 / 6	USB2 D7+ / USB2 D8+
7 / 8	GND / GND
9 / 10	NC / Reserved

42. RTC battery connector (BAT1)

Use the correct approved battery type and observe polarity. Do not recharge, crush, heat, or dispose of a lithium battery in fire.

Pin(s)	Signal
1	GND
2	VBAT

43. Expansion I/O Type-C Connector male (EIO1 ~ 2)

The PDF shows the EIO1 and EIO2 connector illustrations but does not provide a separate pin-assignment table.

44. Buzzer (BZ1)

The PDF shows the buzzer symbol but does not provide a separate pin-assignment table.

System applicability notes

• The iPC400-MB is a 170 × 170 mm mini-ITX board.
• External ports are grouped along the system rear I/O: 3 Ethernet, 8 USB 3.2 ports, 2 USB 2.0 ports routed by an internal cable, HDMI, DisplayPort, audio, and serial connections according to the ordered configuration.
• Memory, M.2 sockets, RTC battery, fan headers, SATA connections, and service headers are beneath the system heatsink or inside the chassis.
• The iPC402 expansion assembly provides PCIe card access. Supported shared-lane configurations are one x16, two x8, two x4, or one x4 plus one x8. Total add-in-card power is limited to 75 W across both cards and card length to 180 mm.
• The system and board references list an operating range of 0°C to 60°C, storage from −40°C to 85°C, and non-condensing humidity. Use the exact assembled-system rating for the iPC400/iPC402 configuration.
• The 2024 board reference lists processor-specific graphics capabilities, legacy CPU options, and thin mini-ITX configurations. Those configurations do not define this system; refer to the iPC400/iPC402 system specifications above for applicable CPU, graphics, memory, and I/O limits.