12-2020
dormakaba Canada Inc. RAC5 MFC Installation Guide – PK3738 | 18
7 Annex C: Electromagnetic Interference
As per any other electronic equipment, the RAC5 MFC can be affected by electromagnetic interference cause
by industrial electrical equipment such as elevator motors. To prevent the unit from operational instability, such
as ‘freezing’ or losing programming, shielded cables should be used and connections made as per the diagram
below.
Figure 9 – Shielded Cable
Wall-Pluggable
Transformer
RAC5
Enclosure
RAC5 Main
PCB
Mounting
Screw
Ingress
Reader
Egress
Reader
Power Supply
Electrical
Connector
Shield Wire
of Cable
Ground Wire
Shield Wire
of Cable
To Ground
1- Use shielded cables for the readers
2- Connect the shield wire of the reader cables to the Ground wire
3- Connect the wires to the Mounting screw of the RAC5.
(Remove the paint under the mounting screw for good electrical contact.)
Shielded
Cables
