Quad SPDT Relay module

Description

Sometimes a simple relay output remains the best choice. Less worries of switching potentials, AC or DC, PNP vs NPN, etc. Just the plain and simple switching contacts which replace what could have been a toggle switch. Except these are controlled remotely over the CAN(open) bus.

Functionality

• Drive four 2A relay outputs
• CANopen® fieldbus, generic I/O module profile CiA 401
• Manual override via control panel
• Configuration via CANopen, control panel or using PC application via micro-USB port
• Possibility for custom firmware with specific signal processing functions

Plug & Play configuration

Out of the box, the device is configured as self-starting to switch to OPERATIONAL state autonomously. The node-ID is programmed to 44 and one RPDO is configured to receive output updates. This means the device can be used out-of-the-box by writing 2 bytes to ‘raw’ CAN-ID 0x22C. First byte carries a bitmask to indicate which bits must be processed and which are to be ignored. Second byte contains 4 output bits relating to the respective outputs. (Raw meaning without any CANopen stack or functionality on the receiving end.)

• Automatic switch to NMT state OPERATIONAL
• RPDO1 (CAN-ID 0x200+$NODEID) receives 2 bytes with 4LSB assigned to the 4 relays