VAT 64246-UEHC-0001, Installation, Operating, & Maintenance Instructions

Page: 31 / 73

Series 642 INSTALLATION
603685EA Edition 2013-08-22 31/73
4.5.9 Analog inputs and outputs
Pin Function Signal
type
Description
25 SETPOINT
Analog
input
1)
The meaning of the setpoint input depends on the operation mode.
LEARN:
A voltage of 0-10V shall be applied to this input as pressure limit for learn.
The limit pressure is in linear relation to the applied voltage. 10V relates to
sensor full scale.
In case of 2 sensor operation 10V relates to sensor 1 full scale (high
range).
To activate pressure limit function for remote operation it must
be configured accordingly. Refer to «Interface configuration»
PRESSURE CONTROL:
A voltage of 0-10V shall be applied to this input as pressure setpoint. The
pressure setpoint is in linear relation to the applied voltage. Depending on
selected SETPOINT RANGE 10V means either sensor full scale or 10%
of sensor full scale.
In case of 2 sensor operation 10V relates to sensor 1 full scale (high
range).
POSITION CONTROL:
A voltage of 0-10V shall be applied to this input as position setpoint. The
position setpoint is in linear relation to the applied voltage. 0V is closed
but not isolation function and 10V is open position.
(Use digital input for isolation function)
12 PRESSURE
Analog
output
1)
This output indicates the current pressure as 0-10V. The output voltage is
in linear relation to the pressure. Depending on the selected SETPOINT
RANGE 10V means either sensor full scale or 10% of sensor full scale.
In case of 2 sensor operation sensor full scale relates to sensor 1 (high
range).
11 POSITION
Analog
output
1)
This output indicates the current valve position as 0-10V voltage range.
The voltage is in linear relation to the valve position. 0V is closed but not
isolation function and 10V is open position.
(Use digital output for isolation function)
13 ANALOG GROUND
Analog
ground
Ground for analog input and analog outputs.
1 CHASSIS GROUND
Chassis
ground
Chassis ground connected to case. Shall be used to connect cable shield.
1) Refer to «Function and wiring» for details about input / output circuit.