Specifications

D1256/D1257

Overview

D1256/D1257 Installation Instructions

2.2.1 Display

Both the D1256 and D1257 feature a 16-character English language display, with custom programmable text.

The custom text is provided through programming the control/communicator. See Figure 1: D1256/D1257

Internal Arrangement.

Both display the latest status conditions of the fire system using words, numbers, and symbols. When an alarm

occurs, it is displayed until the user acknowledges the event at a command center. When a series of events

affecting the system occur, each event displays in order of its priority.

2.2.2 Audible Tones

Both the D1256 and D1257 have a built-in speaker that produces several distinct warning tones. The speaker

volume can be changed by adjusting the potentiometer. See Figure 1: D1256/D1257 Internal Arrangement. Turn

the potentiometer clockwise to increase and counterclockwise to decrease the volume. You cannot connect

external annunciation devices to the annunciators.

The following signals are silenced by pressing the correct key at the D1256 Fire Command Center.

• Fire Signal – When the system is in alarm, the annunciators emit a pulsed, high pitched "bell" tone.

• Invalid Key Buzz – When an invalid key, or sequence of keys, is pressed, the annunciators emit a flat buzz

tone.

• Keypad Encoding Tone – Emits a muted beep tone as each key is pressed to indicate that the entry has

been accepted. To disable this feature, see Setting the DIP Switches.

• Trouble Buzzer – When a trouble event occurs, such as a service alert, the annunciators emit a two tone

warble until you press the "Trouble Silence" button on the D1256.

2.2.3 Switch Settings

A six-position switch located under the D1256 and D1257 cover allows you to select the address of each

annunciator and silence the keypad encoding tones. See Figure 1: D1256/D1257 Internal Arrangement.

To access the switches:

Remove the front cover.

Using a small flat-bladed screwdriver, gently push in the two bottom tabs of the enclosure cover.

As the tabs are pushed in, lift the cover away from the base.

Set the switches as follows:

Switch

Address # 1 2 3 4 5 6

Address #1 ON ON ON ON ON

Address #2 OFF ON ON ON ON

Address #3 ON OFF ON ON ON

Address #4 OFF OFF ON ON ON

Address #5 ON ON OFF ON ON

Address #6 OFF ON OFF ON ON

Address #7 ON OFF OFF ON ON

Address #8 OFF OFF OFF ON

ENCODING TONE ON/OFF

Table 2: Switch Address Settings