UMX-4, UMX-8

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UMX-4, UMX-8

Multi-Function Input / Output Expander UMX-4, UMX-8

Multi-Function Input / Output Expander


The UMX-8 multi-function input/output expander is a unique microcomputer-based multifunction interface that expands the input or output capability of building automation controllers. It has eight SPDT output relays that provide on/off control from a jumper-selectable PWM, current or voltage input signal. The sequence of operation can be easily selected by DIP switches. A dual mode allows two UMX-8s to be controlled in sequence from a single input signal. The HOA switch allows for manual override of each relay output. Feedback and LED's provide status indication of the UMX-8. The UMX-4 provides four SPDT output relays. All jumper positions and DIP switch settings are identical to the UMX-8. The operation of the UMX-4 is identical to relays 1-4 on the UMX-8. Feedback and LED's provide status indication of the UMX-4.


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QtyModelDescriptionIn StockList PriceInternet Price
UMX-4 4 LOAD MULTIPLEXERIn Stock530.40297.02
UMX-8 8 LOAD MULTIPLEXERIn Stock743.58416.40


No accessories found
  • Four or eight SPDT relay outputs
  • HOA switches
  • LED status indication
  • Field-selectable functions
  • Output status feedback
  • Override indication
  • Field-selectable PWM, current, or voltage inputs
  • Pull-apart terminal blocks

Supply Voltage:24 VAC ±10%, half-wave; or 24 VDC ±10%

Supply Current:

 :UMX-4 210 mA @ 24 VAC; 90 mA @ 24 VDC maximum

 :UMX-8 350 mA @ 24 VAC; 150 mA @ 24 VDC maximum

Input:PWM, 0-20 mA, 0-5V, 0-10V, 0-15V, jumper selectable

Input Impedance:250Ω (mA input) maximum; 46.4 kΩ minimum (VDC input)


 :UMX-4 Four SPDT relays

 :UMX-8 Eight SPDT relays

Override:Transistor switch, 30 VDC @ 100 mA maximum


 :UMX-4 One output, 1-5V (3 mA) for relays 1-4

 :UMX-8 Two outputs, 1-5V (3 mA) for relays 1-4 and for relays 5-8

Relay Output :5A @ 24 VAC/VDC

Wiring Terminations:Screw terminals

Operating Temperature:32° to 158℉ (0° to 70℃)

Operating Humidity:5% to 95% RH (non-condensing)

Dimensions:3.3"H x 7.0"W x 1.6"D (8.3 x 17.8 x 4.0 cm)


UMX-4:0.8 lb (0.4 kg)

UMX-8:1.0 lb (0.5 kg)

Approvals :RoHS

Warranty:1 year

Download Additional Data

document   UMX-4, UMX-8 Catalog Page
document   UMX Datasheet