Instruction manual

Designing and Planning an M2150 System
24 Access Control Design Guide
Specifying the Door Furniture
The door furniture (Figure 2-3) can consist of a release device, door monitor, exit-request button/sensor
and bypass circuit. The exit-request button and bypass circuit are optional. The bypass circuit enables a
device such as an alarm sensor to be automatically bypassed while the lock is released.
Figure 2-3: Door Furniture
Determine whether exit-request and bypass circuits are required, the position of any exit-request button
and the cable routing path between the door controller and door furniture. The path may be the same or
similar to the path used for the reader.
Power for Door Releases
In most cases, power for door releases (and auxiliary outputs) can be sourced from the controller's internal
power supply unit. Make sure that the power supply is able to provide sufficient current for all required
devices. The section on page 27 explains how to do this.
If additional current is needed, you will need to order separate power supplies, but note that for sites
requiring UL compliance, all additional power supplies used must be power limited, UL Listed for Access
Control Systems and Accessories.
Using Noise Suppression
Door releases or other inductive loads (including relays) must contain noise suppression circuitry. Some
locks (e.g. Abloy Magneguard) already contain a metal-oxide varistor (MOV) to suppress noise. In this
case, no additional circuitry should be fitted, or the lock may fail. In all other cases, an IN4004 suppression
diode must be fitted across the coil connections (cathode bar to positive), as shown in Figure 2-4.
Determine whether any door releases need separate noise suppression circuitry, and if so, order the
correct components.