4stage Multiplexer


The Digital Input Expander allows 4 volt free inputs to be monitored by a single analogue input channel. The resultant analogue value can be decoded by the A to D function module in an BMS controller to produce internal digital status bits for alarm monitoring or other status input applications.

Delivery in approximately 2-5 working days (subject to availability)

Download 4stage Multiplexer Datasheet

SKU: SS00560R8 Category:



  • Expand capacity of existing ddc for cost effective installation.
  • Visual indication of LED inputs for easy commissioning
  • Application includes lighting controls and monitoring status of equipments

Product Specification

  • Supply Voltage: 24Vdc or ac ± 15%
  • Supply Current: 50mA max (I mode), 30mA max (Vmode)
  • Input Channels: 4 volt free contact switch 24Vdc
  • Input Treshold: Upper 17.5V max (ON) level, Lower 7.5V min (OFF) level
  • Distance: Max. distance of IOD4 from controller 25m (V mode) 1000m (I mode)
  • Output: Mode selectable by link header current/voltage (I/V)
  • I: 0 to 20mA, max. resistance of load 250Ω
  • V: 0 to 100Vdc, max. current 1mA
  • LED: Single LED per input channel, LED on indicates contact closed

Ambient limits

  • Storage: -10°C(14 °F) to +70°C(158 °F)
  • Operating: -10°C to +50°C
  • Humidity: 0 to 90%RH non-condensing
4stage Multiplexer


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