User's Manual

Part # 430-4G-050-00-006
© 2011 - L-1 Identity Solutions Inc. All rights reserved
Planning the Installation
2.1.7 CHOOSE POWER SOURCE
4G CR-Pass, 4G V-Flex Lite, 4G V-Station Lite and 4G SecureControl devices can be
powered by several methods:
 12V DC regulated (4G CR-Pass, 4G V-Flex Lite, 4G V-Station Lite and 4G
SecureControl)
 Power Over Internet (PoE) through an inline PoE 802.3af power injector (4G
CR-Pass only)
Power sources should be:
 Isolated from other equipment
 Filtered
 Protected by an Uninterruptible Power Supply (UPS) or battery backup
 Protected by a voltage suppression device if transient electrical surges are
an issue in the location.
When planning a system, know the power requirement of each device. If multiple devices are
to share a common power supply, exercise care to avoid excessive voltage loss on the wires.
Voltage loss can lead to communication problems when devices are talking and/or listening
on different ground references.
Voltage loss is directly proportional to wire resistance and the current the wire carries. Always
place the device as close as possible to the power supply and always select a wire size
appropriate for the load. 4G Lite devices run on DC power between 12 V and 24 VDC.
Power requirements for all 4G CR-Pass, 4G V-Flex Lite, 4G V-Station Lite and 4G
SecureControl models are listed below:
Table 2-3 4G Lite Power Requirements
Power Requirement: 12 watts
Input Voltage Range: 12-24 VDC (-10%, +15%)
Peak Current (12 VDC) 500 mA
Peak Current (24 VDC) 250 mA
Most power supplies on the market today provide good input and output isolation. However,
power supplies which do not provide isolation (or have high leakage capacitance), coupled
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