www.linearcorp.com 11 e3 eMerge Installation Instructions
To determine standby battery time:
1. Determine the total standby load of the system by adding the maximum and standby current
draw of the devices connected to the panel. For example, if the system consists of the control
panel (200 mA) and one 75 mA reader the total standby load is 275 mA (200 mA+ 75 mA).
2. Divide the total standby load by 1000 to convert it to amps. For example, 275 / 1000 = .275.
3. Divide the amp-hour rating of the battery by the total standby load to determine the standby
time for the system. For example, 7.0 / .275 = 25.5 hours standby time using a 7 AH battery
with a system that consists of the control panel and one 75 mA reader.
Power Fault
If AC power loss is detected, the power supervision module will automatically switch to the
backup battery and activate the fault input. e fault input can be con gured via programming to
trigger an event such as e-mail or popup message. e transaction will be logged in the history of
the controller.
Tamper Protection
A tamper switch is mounted inside the enclosure and is pre-wired to the tamper input on the
terminal strip. If the cover is removed for any reason the tamper switch will activate, triggering a
condition that can be linked to an event action in programming (e.g., send an e-mail or generate
an output).
4.3 PoE Connection (optional)
Systems can be powered using Power over Ethernet (PoE), which is a method for providing
power via Ethernet cabling. To place the controller in PoE mode, move the Power Input Jumper
to the left position as illustrated in Figure 4.4.
A Power over Ethernet installation must use a high-power 30W PoE injector and the Linear
E3-POE module. Refer to the PoE module’s installation guide for speci c installation
information.
Figure 4.4. Power Input Jumper
e3 PoE Module Installed
Note: For PoE
applications only use
UL294B listed PoE power
supplies. PoE is not
supported for installations
requiring UL294.
Note: Each controller
consumes 200 mA of
current at 12VDC (2.4W).
Note: When a power
fault is detected, and
the battery backup is
used, system may be
confi gured to back up
database and log fi les to
the microSD card.
Note: A PoE module
is required for each
controller that will use the
PoE option.
Note: Linear E3-POE
module; P/N 620-100159
(requires additional high
power injector) Linear
30W PoE injector:
POE-PLUS
JP1
EXTERNAL 12VDC
POE
(Default)
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