Gas Detection MDD-R4/T Ourput Relay control unit

The MDD-R4 / T digital control modules are designed to
expand the Digital Gas Detection System (CSDG).
They enable the separation of local control of executive
devices / signalling devices for a selected group of up to 32
detectors working in CSDG. They have four contact outputs
and two alarm outputs 12V.
MDD-R4 / T are additional modules, requiring cooperation
with an MDD-256 / T supervisory module.
Communication with the supervisory module takes
place in the industrial standard RS-485 in accordance
with the MODBUS RTU protocol. The MDD-R4 /T module
constantly receives from the supervisory unit information
on the alarm state of a selected group of detectors and
performs the set alarm functions by activating the optical
alarm signalling and activating its own contact and alarm
outputs 12V.

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