984-0013-04
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WIRING AND LAYOUT CONSIDERATIONS
1. Wiring from the EMS5(s) to Elevator Phones or phone devices:
You will need one pair of wires from each elevator phone (or phone device) to the
EMS5(s). Cabling can be telephone communication cable, which is normally 20-22
gauge twisted pair. Through the traveling cable you will need a twisted shielded pair
with the shield grounded at the elevator controller or a good earth ground. Note: the
shield needs to be connected throughout the entire run including any splices and
should only be grounded at the controller end.
CAUTION – To reduce the risk of fire, use only No. 26 AWG or larger
telecommunication line cords similar to the cords supplied with the system.
2. Wiring from the EMS5(s) to Machine Room Phones without display:
You will need two pair of twisted wires from each Machine Room phone back to the
EMS5(s) unit(s).
3. Wiring from the EMS5(s) to Master Stations with Display:
Because the signaling between the EMS5(s) and the Master Stations with displays is
digital, the digital signal noise WILL bleed over onto the pair coming from the Local
Service port. Add up the total length of wiring from Com-Out to Com-In on each
EMS5 plus the total length of cabling required to all Master Stations with a Display:
a. If the total length of wiring from COM-OUT to the Master Stations with Displays is
between 100 feet and 500 feet you will need two separate cables, one cable for
the wiring from the Local Service port and one cable for the wiring from the COM-
OUT port. You can pull a separate pair for the COM-OUT connection.
b. If the total length of wiring is over 500 feet you will need at least one pair for the
COM-OUT connection. The Local Service pair can be 2 pair twisted with each
pair shielded separately such as General Cable P/N 2GY-R-GCC. The
shield of the Local Service port pair should be grounded to building ground on
one end closer to the EMS5.
