MCX402DR Operating Manual.doc
2018-09-03
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Design and application
The MCX402DR-BRD is I/O expander dedicated to the RACS 5 system. The device is connected to MC16
access controller to provide control of 1 or 2 doors with Wiegand or PRT (RACS CLK/DTA) readers but in
case of PRT readers new firmware must be uploaded to the expander. The expander offers eight NO/NC
inputs, two relay outputs, two transistor outputs, 1.0A main power supply output and 0.2 auxiliary power
supply output. All outputs of the expander are protected against overload. MCX402DR-BRD is supplied from
18VAC and it offers 13.8VDC at AUX and TML outputs to supply all door devices including door lock and
readers. The expander can be equipped with backup battery.
The expander is offered individually as electronic module or as a component of MCX402-1-KIT for read-
in/out door control or as a component of MCX402-2-KIT for two read-in doors control.
In case of upgrade from RACS 4 to RACS 5 system, PR411 and PR402 controllers can be converted into
MCX402DR expanders by upload of new firmware.
Characteristics
RS485 interface for communication with MC16 access controller
Wiegand 26-66bit interface for communication with two readers of third party
RACS CLK/DTA interface for communication with two PRT series readers
8 inputs NO/NC
Relay output NO/NC 1,5A/30V
Relay output NO/NC 5A/230VAC
2 transistor outputs 1A/15VDC
Power output 13.8VDC/1.0A
Power output 13.8VDC/0.2A
18VAC, 12VDC or 24VDC power supply
Battery charging with 0.3A current
Protection against full battery discharge
Reporting of power supply status to access controller
Fig. 1 General concept of MCX402DR-BRD application
