(under construction)

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
  • Modbus-RTU RS485 fieldbus*
  • 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
16-channel thermistor interface

Network functions (via our gateway)

  • Control outputs directly via HTML requests, no cloud needed
  • Logging to micro-SD card
  • Node-ID assigned via serial number
  • Remote configuration & firmware update

Specifications

  • 4× SPDT (single pole / double throw) relay, suitable for 30VDC/2A or 125VAC/0.5A *
  • 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 9-36VDC, <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
  • 3-pin 3.81mm Modbus/RS485 terminal block
  • Micro-USB control & bus-powered capability
  • Mating terminal blocks included, including the T-Bus contact block
  • ATEX (IEC 60079) 'ec' & 'ic'

Plug & Play configuration

Plug&play operation

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

CANopen

ATEX

Availability

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*) For ATEC 'ic', peak relay voltage is limited to 90V and input voltage 24V
'CANopen' is a registered trademark of CAN in Automation (CiA)
Modbus-RTU connectivity under development