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MO 690 H3X
Power Relay I/O · CAN-bus module with eight relay outputs
MO 690 H3X is an economical CAN-bus relay module for commercial and off-road machines. Eight relay outputs with potential-free normally-open contacts switch loads apart from the module's own supply, and eight digital inputs read switches and signals, all through a single 24-pin connector.
- I/O
- Relay Module
- Connector
- 24 Pin Connector
- Supply
- 12 VDC / 24 VDC

Overview
Potential-free switching over CAN.
Highlights
- User programmable option New
- 8 relay outputs with potential-free normally-open (NO) contacts, 4 A per contact
- One common contact per relay pair (4 common pins)
- Suppression diode and capacitor across every contact
- 12 V (H30) or 24 V (H31) relay version to match the vehicle supply
- 8 active-high digital inputs
- Overvoltage protection up to 36 VDC via TVS diodes
Specifications
- Communication
- SAE J1939 (CAN 2.0A/2.0B), UDS (ISO 14229) protocol
- Operating Voltage
- 12 VDC (H30), 24 VDC (H31)
- Connector
- 24 Pin Connector (2x12, 4.2 mm pitch)
- I/O Class
- Relay Module
Order Code
Build the order code from its segments
Pick one option from each column of the table and join them with dashes — the result is the code to quote when you order.
- MO 690
- H3X
- SXXXX
X stands for the digits you pick from the table.
| MO 690 - | H3X - Hardware | SXXXX Software |
|---|---|---|
| H30 - 8 Active-High Inputs, 8 Relay Outputs (12 V) | S1000 - Default | |
| H31 - 8 Active-High Inputs, 8 Relay Outputs (24 V) |
* Available upon request with minimum order quantity.
Example:
- MO 690.H30.S1000
- 8 Active-High Inputs, 8 Relay Outputs (12 V) Relay Module with SAE J1939 interface.
Need a custom configuration?
Contact EngineeringTell our engineering team about your machine platform and signal requirements. We'll propose the right hardware variant and software baseline.