Doc Ref UD112-61S.vp Page 3
Operation
Introduction
The 112-61s provides an analogue output
proportional to the number of active
inputs. Each unit will accept up to five
inputs but the outputs of multiple units
may be connected in series (voltage) or
parallel (current) for applications
monitoring more than five inputs - see
Note 2. below. The number of input
signals required for full scale output is set
by internal switches.
Notes:
1. Input and Output signal types are
configured during manufacture and
are not user selectable. Information on
the types set may be found on the
data label on the side of the enclosure
and the connection label on the
underside of the plug-in module.
2. In multiple unit configurations the
output signal range will have been
configured to suit the number of units
connected together. Connection
instructions will have been provided
separately.
Switch settings
SWITCH OFF ALL POWER
SUPPLIES AND ISOLATE
SIGNAL WIRING FROM
DANGEROUS VOLTAGES
BEFORE PROCEEDING.
The number of intput signals required for
full scale output is set by internal switches
located on the printed circuit board - for
location see Fig 1. The switches may be
accessed as follows:
Opening the module
(i) Isolate all supplies to the unit.
(ii) Unscrew two module retaining screws
and separate the plug-in module from
the base section.
(iii) With the fingers, ease apart the longer
sides of the cover releasing the
interlocking tongue and groove
fastenings to remove the plastic plate
with the connections label.
(iv) Slide out the printed circuit board
(PCB) noting the location and
orientation of the PCB.
Setting number of inputs
Set the ‘tens’ and ‘units’ switches to the
number of inputs being monitored. For
applications where multiple units are
being connected to cater for more more
than five inputs, the switches in each unit
must be set to the total number of inputs
being monitored. e.g. to provide a full
scale output with 15 input signals present,
three Status to Analogue Converters
would be required, each set for 15 inputs.
NB see Note 2 under ‘Operation’.
captive washers). Gently pull away the top
section of the module from its base to
expose the fixing points and wiring
terminals. To refit the module, align the
module edge connectors with the socket
in the base and carefully press home.
NB Do not over tighten the module
securing screws.
