Seaward B255 - Manual (Page 19)

Operating Manual Clare B255 Power Tool & Appliance Test Station
15
Rear Panel Connections
The various connectors shown in the illustration opposite are numbered,
where appropriate, to correspond with the accessories described on the
preceding pages – other connectors are described below.
a. Guard / Safety Switch – used to connect the guard (door) switch from the
Test Area barrier or other external safety interlock system – a mating plug top
is supplied for wiring purposes. Switch contacts must be normally open,
closing to start, and be volt-free but with a minimum rating of 2A / 24Vd.c.
As an alternative to the guard switch, a remote, manually operated Safety
switch can be supplied as an optional accessory.
Where no guard or safety switch is to be used, a shorting link must be wired
across the contact terminal pins.
b. Beacon Port – this socket can be used to connect any standard Green /
Red, 2 lamp, safety beacon fitted with 24V 5W bulbs. The mating plug should
be wired in accordance with the adjacent wiring diagram on the label. The
beacon provides a visual indication of instrument status – Green light shows
that the instrument is switched ON, with power on and safety interlock closed,
and ready for test application. The Red light shows that a test is being applied.
A pre-wired status beacon can be supplied as an optional extra.
c. 110V / 32A Inlet – when applying Earth Leakage or Load Current tests to
110V industrial equipment, an external supply source is required. Any
standard, single-phase, 240 / 110V safety-isolating transformer can be used,
provided that it has a VA rating to suit the product(s) to be tested.
FIG.3 Rear Panel Connectors