Description

Sometimes a simple relay output remains the best choice. The kickoff for this device was the need for polarity reversal of a current source without influencing the potential of the current source connections. A four-quadrant source seemed a bit too excessive, so a couple of relay contacts were the way to go.

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

Specifications

• 4× SPDT (single pole / double throw) relay, suitable for 30VDC/2A or 125VAC/0.5A ^* (IEC 61131-2 type 0.25)
• OLED display shows status and allows for local control, CAN-bus configuration and SDO editing
• CANopen® device profile for generic I/O modules (CiA 401)
• Supports LSS node-ID assignment and Fastscan (CiA 305)
• Supports automatic bit-rate detection between 10kbps and 1Mbps (CiA 801)
• CAN-FD 'Ready' (no active support for FD datarates yet, but tolerates FD traffic on bus)
• Up-to-date EDS file generated by and downloadable from the device
• Supports power management & monitoring features (CiA 302-9 + custom for monitoring of bus voltage, input current, CPU voltage and CPU temperature)
• Bus powered, operating voltage 10-30VDC, <1W ^*
• 3-Pin 3.81mm terminal blocks for relay contacts
• DIN-rail enclosure 101x80, width 17.5mm
• T-Bus CAN-bus connection // 5-pin 3.81mm terminal block
• Micro-USB control & bus-powered capability
• Mating terminal blocks included, including the T-Bus contact block
• ATEX increased safety 'ec' (IEC 60079-7)

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