Connections For Internal Relay Operation - bioscrypt V-Flex 4G Installation Manual

Installation Guide – October 2009 – Edit Purposes Only
Assuming the current drawn by the deadbolt/door strike is less than 170 mA, the
connections between the V-Station 4G or V-Flex 4G device, deadbolt/door strike, and
power supply for the deadbolt/door strike should be made. Note that a snubber diode (1
N4007 or equivalent) must be connected across the deadbolt/door strike to protect the
DC power supply from inductive kickback.
If the current required to operate the deadbolt/door strike exceeds 170 mA, an external
relay must be used in conjunction with the V-Station 4G or V-Flex 4G device. The
external relay must be specified so that its contacts are rated to carry the current
required by the deadbolt/door strike, and that the current required to operate its
energizing coil is within the 170 mA capacity of the V-Station 4G or V-Flex 4G device's
internal relay.
October 15 2009 – Installation Guide Draft – Edit Purposes Only
The internal relay is limited to a maximum current of 170 mA. If the
deadbolt/ doorstrike to be controlled draws more than 170 mA,
damage to the device may occur. If the deadbolt/door strike load
exceeds 170 mA, an external relay must be used, as described
below. Do not use the same power supply to power a V-Series 4G
device and a door strike.
The snubber diode and DC power supply for the deadbolt/door strike
are not supplied with the V-Station 4G and V-Flex 4G devices. The
power supply should be specified in accordance with the voltage and
current requirements of the deadbolt/door strike, but it must be
ensured that the current to operate the dead bolt/door strike does
not exceed 170 mA.
Figure 4-13 Connections for Internal Relay Operation
WARNING
CAUTION
2009
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