MCT12E Operating Manual
05.10.2020
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Fig. 1 MCT supply from MC16 access controller
Fig. 2 MCT supply from dedicated power supply unit
RS485 bus
The communication method with MC16 access controller is provided with RS485 bus which can encompass
up to 16 devices of RACS 5 system, each with unique address in range of 100-115. The bus topology can
be freely arranged as star, tree or any combination of them except for loop. The matching resistors
(terminators) connected at the ends of transmitting lines are not required. In most cases communication
works with any cable type (standard telephone cable, shielded or unshielded twisted pair etc.) but the
recommended cable is unshielded twisted pair (U/UTP cat.5). Shielded cables should be limited to
installations subject to strong electromagnetic interferences. The RS485 communication standard used in
the RACS 5 system guarantees proper communication in a distance of up to 1200 meters as well as high
resistance to interferences.
Note: Do not use more than single pair in UTP cable for RS485 communication bus.
