10
1.4.2
Power Supply Connection
The unit requires the following connections as shown in
the diagram below
1.4.2.1 Volt free alarm outputs
The unit has connections for volt free alarm outputs these
are on the three double terminals next to the main power
input terminals.
The top terminals are for unit volt free fault alarm as
follows:
542
common for fault alarm
543
Normally closed when no fault
544
Normally open when no fault
The bottom terminals are for unit volt free run signal as
follows:
545
Common for run signal
546
Normally closed when unit is in
standby or fault (not running)
547
Normally open when unit is in standby
or fault (not running)
If the unit is part of a master slave system or
network, the run & fault outputs can be selected (via
keypad & display) as either network (system) or unit
only. This is selectable at Service Engineers Level,
in the Engineering Menu, in the window “Fault/Run
Scope”. The default is “network”. It is possible to
get both alarm & Run indication in all units: Single
cylinder units will give this indication if the service
interval has expired; Twin Cylinder & Networked
units will give this indication if the service interval
has expired or if the master cylinder is operating and
any slave cylinder (or cylinders) are in fault.
1.4.2.2 Unit control terminals
For unit control and network termination see
section 1.5 the terminal layout is shown.