719S 2 Door Switching Unit
PD-008 Iss 6
Installation & Operation Manual
Page 6 of 20
Important Safety Information
Connections to the 240V AC mains supply must be carried out by a qualified electrician
or similar competent person, and made in accordance with accepted safety practices. A
two-pole switch (as provided by a Consumer Unit or Switch-Fuse) must be included to
isolate both Live and Neutral during Installation or Maintenance. The circuit must be
protected by a fuse or other current-limiting device, rated according to the capacity of
the cable used, up to a maximum of 10A. Use only mains cable to BS6004, BS6500, or
equivalent, within the following specified limits:
Min
Max
Conductor Diameter
1.0 mm (0.8 mm
2
)
2.25 mm (4 mm
2
)
Cable Diameter
4.0 mm
8.0 mm
The Model 225, 340C or PS4 Power Supply (where used) must be wall-mounted onto
plasterboard, wood or a similar non-conductive material, in a protected indoor
environment such as an electrical cupboard. A fuse protects the internal transformer on
the 225; always replace with the correct type and rating.
Power Supply Model
Fuse
225
T125mA 250V
The fuse must be of the 20mm glass, 250V, and time delay type approved to BS EN
60127 or equivalent).
The 340C and PS4 do not have replaceable fuses.
When fitting the power supply cable (both mains and low voltage) ensure the cable
entry cut-outs in the enclosure lid are no larger than necessary for the cable diameter
used and under no circumstances must they be taken beyond the outer cut-out zones.
All equipment except the entrance panel must be placed in a protected indoor
environment.
