Radionics D1255 Command Center Installation Instructions
These installation instructions describe the D1255 Command Center, an SDI‑bus compatible keypad with a 16‑character display, illuminated keys, and a built‑in speaker. The document explains how the unit communicates with control panels, provides audible tones, and can be programmed for various system functions.
The guide covers mounting options, wiring with a 4‑wire flying lead, DIP switch address configuration, and includes a full specifications table with dimensions, power requirements, environmental limits, and maximum wire length.
| Height | 4.56" |
|---|---|
| Width | 8.15" |
| Depth | 0.816" |
| Color | Warm Gray |
| Display | 16‑character vacuum fluorescent, soft blue |
| Operating Temperature | 32° to 122° F (0° to 50°C) |
| Relative Humidity | 5% to 85% @ 86°F (30°C) |
| Nominal Power Supply | 12 VDC supplied by the panel |
| Idle Current | 104 mA |
| Maximum Current | 206 mA |
| Maximum Wire Run | 2000 ft with 22 AWG wire |
Use the six‑position DIP switch under the cover; switches 1‑4 and 6 assign the address, while switch 5 toggles the encoding tone.
The maximum recommended wire run is 2000 ft using 22 gauge wire.
Turn the potentiometer clockwise to increase volume and counter‑clockwise to decrease it.