Raritan
DX-PD2C5
Two active dry contacts powered by 12V to support door locks. Five digital Normally Closed (NC) or Normally Open (NO) contact closures which require customer-provided NC or NO switches, e.g. door open/close, smoke present/absent, etc. Each of the five ports (channels) can be independently set to NC or NO, factory default is NC (Not supported by DPX, PX or PX2 models.) RJ-45 connector.
DX2-CC2
Dual Contact Closure Sensor - requires customer-provided Normally Closed (NC) or Normally Open (NO) switch like door open/close, door locked/unlocked, smoke (present or absent). Factory default is NO. Each of the two ports (channels) can be independently set to NC or NO. RJ-45 connection to the PX3 PDU
DX2-DH2C2
Intelligent Door Sensor - Two active dry contacts powered by 12V to support 3rd party door locks. Two digital Normally Closed (NC) or Normally Open (NO) contact closures that require customer-provided NC or NO switches, e.g. door open/closed, smoke present/absent, etc. Each of the two ports (channels) can be independently set to NC or NO, factory default is NC. Dual RJ-45 connectors