Digital Monitoring Products Inc PC0156 Manual Do Utilizador
InstallatIon
Digital Monitoring Products
2
Installation
4.1 Location Information
A location should be selected that is centrally located between the 1100 Series transmitters used in the
installation. Place the EM20 away from metal objects. Placing the EM20 on or near metal surfaces impairs
performance.
Primary Power Supply
5.1 AC Power Supply
1. Unpack the 16.5VAC power supply and fully unroll the cord.
2. Connect the power supply to the Red RJ22 connection on the back of the EM20.
3. Connect the power supply to a 120VAC outlet not controlled by a switch and
2. Connect the power supply to the Red RJ22 connection on the back of the EM20.
3. Connect the power supply to a 120VAC outlet not controlled by a switch and
secure with the screw provided.
Secondary Power Supply
6.1 Standby Battery
Install the Battery
Observe polarity when connecting battery. Ensure the
battery harness connectors are fully inserted to prevent
shorting.
1. Turn the EM20 over and remove battery cover.
2. The new battery comes with the harness pre-installed.
3. Connect the new battery harness to the locking 4-pin header
2. The new battery comes with the harness pre-installed.
3. Connect the new battery harness to the locking 4-pin header
battery connector inside the battery compartment. Because the
header is keyed, it can only be installed in one direction.
4. Re-install the battery cover and turn the EM20 upright.
6.2 Battery Supervision
The EM20 tests the battery once every hour when AC power is present.
This test occurs 15 minutes past each hour and lasts for five seconds.
A load is placed on the battery and if the battery voltage falls below
11.9V, a low battery is detected. If DC power has failed, a low battery is
detected any time the battery voltage falls below 11.9V.
Figure 3: Step 2 & 3.
Figure 2: Step 1.
Figure 4: Step 4.