Larco Guardian II - Manual (Page 6)

Access Controller
Installation Guide
Page 6 of 15
Mechanical installation of the electric strike
An installation diagram and a template for cutout requirements are supplied in the packaging box with the strike.
Depending on your specific requirements, strike installation may require additional mechanical work. In any case,
make sure that there is ample space for connecting the wires of the strike to those coming from the Guardian II
controller.
The standard mounting hardware (screws) supplied with the strikes are not stainless steel. You may want to
replace this hardware with stainless steel materials, along with a tamper-resistant head.
Wiring the controller
Use continuous runs of wire with no splices. Avoid running the low power and strike wires parallel or near high-
voltage AC lines. When crossing AC lines always try to cross at 90-degree angles. Never run AC power cables or
AC transformer lines with any communication or alarm signal lines. Avoid high-voltage lighting fixtures when
routing wires. Do not allow wires to contact any hot surfaces such as hot water pipes or heating elements.
The Guardian II system should not be connected to earth ground. Earth ground should only be made to the
Guardian II metal enclosure (if so equipped) and to any remote release button enclosure, if it is metal. Do not mix
electrical and earth grounds.
Use of externally supplied power for electric strike or magnetic latch
If a voltage other than 12 VDC or VAC is required or if the current requirement for the electric strike or latch is
greater than 2 amps, an outside source of power will be required. There may also be the need to wire the
Guardian II controller into an existing fire control system that is already supplying power to an electric strike or
magnetic latch. Refer to the appropriate wiring diagram if external power needs to be supplied to the electric
strike or magnetic latch. Always double-check your connections prior to re-applying power.
Externally supplied power for the strike may be either AC or DC. However, voltage and operating current of the
controller device must not exceed the maximum rating of the relay within the Guardian II controller which is:
2 Amps @ 30 VDC resistive load.