ZEL508 Local Zone Expander


8-Zone Local Expansion Card for the FORCE system

ZEL508 is a local expander that allows adding 8 hardwired zones to the Force Security System’s 8 onboard zones.
It is connected to the Force control panel via the ForceBus interface, and assembled inside the control panel’s enclosure.


  • 8 zone inputs
  • Interfacing with the BUS
  • Card and communication status LEDs
  • Detection options:
    No EOL resistors: Open (Short) and Open (open circuit).
    One EOL resistor protection: Close (resistance), Open (open circuit) and short fault (short circuit)
    Two EOL resistors: Close (resistance), Open (open circuit), short fault (short circuit), and Cut fault (open circuit).
  • Programmable EOL resistors
  • Optional EOL loop supervision
  • Sensitivity setting

Technical specifications

  • Baud rate: 19,200bps
  • Voltage levels: 0,+12V
  • Differential, Half Duplex
  • Terminal block for zone connections
  • Operating Voltage Range: 9-14VDC
  • Current Consumption: @13.8V – 40±10 mA
  • Molex connector for panel
  • Operating temperature range: -10° C to +55° C