The F3-20Ex module through the RS485 interface enables access to the input/output circuits.

The device is available in two options:

  • version A – fully intrinsically safe structure, with possible installation in a potentially explosive area
  • version B – auxiliary device for installation beyond a potentially explosive area, provided with an additional intrinsically safe RS485 interface
  • great number of I/O channels supported: 36 digital inputs, 36 digital outputs
  • 3 (version A) or 4 (version B) RS485 ports – communication with the central controller and peripheral devices
  • operating status signalling by LED diodes (status of I/O and RS485 ports)
  • high resistance to mechanical vibrations and harsh environmental conditions
Type F3-20Ex version A F3-20Ex version B
Supply voltage 12 V DC 24 V DC
Communication 3 x RS485 4 x RS485
I/O channels 36 x digital input (NO contact with diode) 36 x digital input (NO contact with diode)
I/O channels 36 x digital output (0-12V/24, 50mA max) 36 x digital output (0-12V/24, 50mA max)
Permissible ambient temperature 0-80 °C 0-80 °C
IP degree IP55 IP55
Weight 2.1 kg 2.1 kg
Designation  1453  I M1 Ex ia I Ma  1453  I (M2) [Ex ib Mb] I