9
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
1.6 the terminal layout is shown here.
