Digital Monitoring Products Inc 1128 User Manual

1128 INSTALLATION GUIDE     |     DIGITAL MONITORING PRODUCTS 

3

1. 

With the 1128 already open, place the 1128 base on the 
wall in the desired location.

2. 

Use the provided hardware pack to mount the base to 
the wall. See Figure 5 for mounting hole locations.  

3. 

Reinstall the 1128 cover back on to the base and tighten 
the holding screw.

4

5

To test the 1128, use a hand-held tester like the DMP Model 
5709C-W to imitate glass breaking.

1. 

Set the tester to tempered glass mode.

2. 

Stand near the protected glass and activate the tester. 
When the 1128 red LED momentarily lights solid red, 
the glass is within the detection range. Repeat this 
step for all detection areas in order to ensure adequate 
coverage. 

Note: Room acoustics can artificially extend the 

1128's sensor range. The 1128's specified range is 
established for worst-case conditions. While the 
1128 may function at an additional range, it may miss a minimum output break. 

Perform a Wireless Walk Test to confirm that the 1128 is communicating clearly with the panel.

1. 

At the keypad, enter 

8144 (WALK) and select WLS. 

2. 

If the 1128 fails to check in at the keypad, relocate the 1128 or the receiver.

1. 

Remove the holding screw and open the 1128 housing.

2. 

Remove the old battery from the holder.

3. 

Observe polarity and insert the new battery in the holder (3 V lithium CR123A battery).

4. 

Replace the cover on the 1128 and secure the housing with the holding screw.

1. 

Hold the 1128 in the exact desired location.

2. 

Press the tamper switch to send data to the receiver and determine if communication is 

confirmed or faulty. See Figures 2 and 3 for tamper switch and LED locations.

Confirmed: If communication is confirmed, the survey LED turns on when data is 

sent to the receiver and off when acknowledgement is received. 
Faulty: If communication is faulty, the LED remains on for several seconds or flashes 

multiple times in quick succession. 

Relocate the 1128 or receiver until the LED confirms clear communication. Proper 

communication between the 1128 and receiver is verified when for each press or 

release of the tamper switch, the LED blinks immediately on and immediately off.