MCX2D Operating Manual
12.11.2020
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Fig. 3 MCX2D installation
Installation guidelines
All electrical connections should be done with disconnected power supply.
If the expander and controller are not supplied from the same PSU then GND terminals of both
devices must be connected with any wire.
3.
O
PERATION SCENARIOS
In typical scenario of operation, MCX2D expanders are used in MC16-PAC-2-KIT two-door access control
kits (fig. 4 and 6). In the alternative scenario of operation, multiple MCX2D expanders are connected to
multidoor MC16 access controller (fig. 5). In such scenario the maximal number of expanders operated by
MC16 controller depends on its type and it is limited by available range of addresses ID=100-115 on RS485
bus of MC16 controller where all MCX and MCT devices must have unique addresses. For example, in case
of read-in/out doors it is possible to control max. 6 doors in such setup as MC16-PAC-6 + 3 x MCX2D + 12 x
MCT while in case of read-in doors it is possible to control max. 10 doors in such setup as MC16-PAC-10 +
5 x MCX2D + 10 x MCT. In both cases, 15 addresses on RS485 bus are occupied. It is also possible to mix
read-in and read-in/out doors within single MC16 controller if the limitation related to the number of RS485
addresses is preserved.
