I/O Expander

XM-8DR-BRD I/O Expander

XM-8DR-BRD I/O expander is dedicated to systems using RACS CLK/DTA protocol. Expander offers eight NO/NC inputs and eight relay outputs with single contact 1.5 A/30 VDC rated.
Optionally, XM-8DR-BRD can be used as standalone device (without communication with master device), when so, its outputs are controlled by signals applied to its inputs.

Ordering guide

I/O expander; 8 inputs; 8 relay outputs; electronic module only; brackets for mounting on DIN rail; operation with PRxx2 access controllers as elevator interface


  • power supply 12 VDC
  • average current consumption 25 mA (plus 40 mA per each activated relay)
  • eight NO/NC inputs
  • eight relay outputs with single NO/NC contact 1.5 A/30 VDC rated
  • RACS CLK/DTA communication protocol
  • electronic module only
  • can also operate in standalone mode as relay module
  • dimensions: 72.0 x 155.0 mm (height x width)
  • weight: ≈115.0 g
  • CE mark
  • environmental conditions of operation:
    • temperature from -25°C to +60°C
    • humidity from 10% to 95%