Relay Modules - ABB SM3000 User Manual

...4.7.1 Analog Inputs

4.7.2 Relay Modules

Offset adjust / Span adjust
Manually fine-tune the offset adjust and span adjust values to
remove process errors. These are calculated values applied
to the raw input signal.
Note. If simulating thermocouple inputs, connect the
millivolt source using appropriate compensating cable – see
Section 5.4.2. For 2-lead resistance thermometers, either
connect the resistance box at the sensor end of the leads or
add the lead resistance to the calibration values.
Engineering
High
Adjusted Value
Engineering
Low
Unadjusted Value
Engineering Engineering
Low
Without Adjustment
(Span Adjust = 1, Offset Adjust = 0)
Select the relay source (a digital source) to be used to
energize/de-energize the relay.
Note. If the relay is used to provide a totalizer count pulse,
the maximum pulse frequency is 5Hz. Consideration must
also be given to the mechanical life of the relay.
Select the relay source polarity.
Note. When polarity is set to 'Positive', the relay is
energized when the digital source is active (On).
4 CONFIGURATION...
Engineering
High
Adjusted Value
Engineering
Low
Engineering
High Low
With Adjustment
(typical example)
Span Adjust (<1)
Offset Adjust (>0)
Unadjusted Value
Engineering
High
95