Installation Guide

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
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
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ve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.