Door control relay modules ensure compatibility of access hardware components and simplify system installation and troubleshooting. Different modules may be specified for one power supply.
CR4 SDC Power Supplies
Door Control Board for Power Supplies, Four Fused SPDT Field Selectable Wet or Dry Outputs, Four Non-Fused SPDT Outputs, 2 Amps at 30VDC, Four Dry Contact Trigger Inputs
$144.14
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