Instruction manual

Underwriters Laboratories (UL) Compliance

Access Control Design Guide

Power-Limited Wiring

UL compliance requires power-limited and non-power-limited wiring to be separated by at least 0.25”

(7mm). Any additional power supply used (e.g. for door releases and auxiliary outputs) must be power

limited, UL Listed for Access Control Systems and Accessories. The recommended cable routing diagrams

in the cabinet installation instructions show power-limited and non-power limited wiring.

Strain Relief

All cables leaving the cabinet must be in conduit/trunking, or must employ a UL-listed strain relief device.

Minimum Requirements for Computer Accessory Equipment

The PC running the SMS software must be ITE UL Listed to UL 60950.

Please refer to the Software Installation Manual for details of the minimum hardware and software

requirements.

Transient Suppressors

Transient protection must meet or exceed the following UL standards for equipment safety:

• Communications circuits & network components; UL497A: Standard for Secondary Protectors for

Communications Circuits (UL274 27.2f).

• Signal Line Transients; UL497B: Standard for Protectors for Data Communications and Fire Alarm

Circuits, maximum rating of 50 volts (UL294 27.2e).

• Supply Line Transients; UL1449 Standard for Transient Voltage Surge Suppressors (UL294 27.2d).

Environmental

If the computer accessory equipment is to be installed in a temperature-controlled environment, 24 hours

of standby power supply must be provided for the Heating Ventilation and Control (HVAC) system, which

must maintain the environment between 55 and 95 degrees F (13-35 degrees C). The standby power

system for the HVAC system must be supplied by an engine-driven generator alone. A standby battery is

not required to be used (UL294 27.2g).

Emergency Egress and System Failure Mode

Locking mechanisms must be installed to allow fail-safe egress, such as during a total loss of main and

backup power. Consult the local Authority Having Jurisdiction (AHJ) when installing access control readers

and locking mechanisms to any portal in an egress path.

A system failure, such as loss of the system program, system lock-up or total failure, does not allow

unauthorized access, although a partial loss of operation may occur.