Potter PFC-7500 Series - Manual (Page 10)

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4.3 Mounting Keypads
Potter keypads have removable covers that allow you to easily mount the base to a wall or other flat surface. After
installing the keypad mounting anchors and bringing the keypad wiring from the panel through the wall, mount the base
and connect the keypad wire harness leads to the keypad wiring. Next, attach the keypad wire harness connector to the
pin connector on the keypad circuit board and install the cover.
For mounting keypads on masonry walls, or for applications where conduit is required, use an appropriate Security
Command keypad conduit backbox.
4.4 Wiring Specifications for the Keypad Bus
1. You can install individual keypads on wire runs of up to 500 feet using 22 gauge wire or up to 1,000 feet using 18
gauge wire. To increase the wire length or add additional devices, a power supply is required.
2. Maximum distance for any one keypad bus circuit (length of wire) is 2,500 feet regardless of the gauge of wire.
This distance can be in the form of one long wire run or multiple branches with all wiring totaling no more than
2,500 feet.
3. Maximum number of devices per 2,500 feet circuit is 40. (Refer to the Keypad Bus section for the specific number
of supervised keypads that are allowed.)
4. Maximum voltage drop between the panel (or auxiliary power supply) and any device is 2.0 VDC. If the voltage at
any device is less than the required level, an auxiliary power supply should be added at the end of the circuit.
Note: Do not use shielded wire for the keypad bus.
4.5 Terminal Wiring Connections
See Figure 5.
Figure 5: Wiring Connections
Do not use looped wire under terminals.
Break wire run to provide supervision of
connections.