04. 20.11.18
MICROgarde controller I and II
Page 31
3.2.1
Safety Notices
Product description
These notes apply to TDSi MICROgarde Access Control Units when driven from an external,
third party, mains power supply. The mains supply must be connected to the equipment by a
permanently connected wiring installation as described below.
Rating
The TDSi MICROgarde Access Control Units, without built-in Mains PSU, draw a maximum
of 150mA from the low voltage (10 to 14V) DC supply, but may be connected to readers,
lock-strikes or ancillary equipment that draw substantially more current. The system
designer or installer must ensure that the power supply, or power supplies used to drive the
system are of sufficient capacity to drive the whole system, and that they are installed
correctly.
Safety WARNING:
CAUTION! DISCONNECT THE MAINS SUPPLY BEFORE REMOVING THE COVERS OR
MAKING CONNECTIONS TO THE EQUIPMENT.
All regulations and requirements MUST be must strictly followed to prevent hazards to life
and property both during and after installation, and during any subsequent servicing and
maintenance.
Positioning and fixing of equipment
The equipment must not be installed out of doors or in damp or exposed conditions.
To ensure mechanical stability the equipment must be secured using appropriate fasteners
or brackets to a wall, pillar or other part of the building structure, or to associated, stable
equipment.
The equipment must not be sited near to sources of heat. It is designed for use in ambient
temperatures ranging from 0 to 40°C.
Connecting a permanently wired mains supply to the
equipment.
Ensure that the mains supply to associated equipment or power supply is SWITCHED OFF
before starting any wiring. Wiring should be in accordance with the current I.E.E. regulations,
or the appropriate standards in your country, and should be performed by a properly
qualified electrician. For permanently connected equipment a readily accessible disconnect
device shall be incorporated in the fixed wiring.
Any mains wiring should be via a switched, fused spur with a 3A fuse (UK) rating, and
should use approved 3 core mains cable of minimum cross section area 0.75 sq mm. The
installation MUST be provided with a double pole isolator switch with a contact separation of
at least 3mm.
Connecting signal wiring to associated equipment.
TDSi MICROgarde Access Control Units must be connected to other equipment forming part
of an overall control system using signal wiring connections made with screened cable with
the screen securely connected to an earth point at the controlled equipment end and at earth
points within the MICROgarde equipment. Where individual remote equipment is locally
earthed it is permissible to disconnect the cable screen earth connection at one end of the
cable. Certain simple control signals to inputs and relay control lines may be connected
using unscreened cable, but remote equipment must be independently and correctly
connected to a safety earth
