Reference

Keypad Bus Wiring Specifications

• DMP recommends using 18 or 22‑gauge unshielded wire for all Keypad Bus circuits. Do not use twisted pair or shielded wire for Keypad Bus data circuits. All 22‑gauge wire should be connected to a power‑limited circuit and jacket wrapped.

• When powering a 7-Inch Touchscreen Keypad from the keypad bus, to maintain auxiliary power integrity when using 22‑gauge wire do not exceed 100 ft. When using 18‑gauge wire do not exceed 500 ft. To increase the wire length or to add devices, install an additional power supply that is listed for Fire Protective Signaling, power limited, and regulated (12 VDC nominal) with battery backup.

• Maximum distance for any one bus circuit (length of wire) is 2,500 ft regardless of the wire gauge. This distance can be in the form of one long wire run or multiple branches with all wiring totaling no more than 2,500 ft. As wire distance from the panel increases, DC voltage on the wire decreases.

• Maximum voltage drop between the panel (or auxiliary power supply) and any device is 2 VDC. If the voltage at any device is less than the required level, add an auxiliary power supply at the end of the circuit. When voltage is too low, the devices cannot operate properly.

For additional information refer to the panel’s Installation Guide.

Specifications

Certifications

• FCC Part 15

• NDAA Compliant

FCC Information

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications made by the user and not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.