Eurotherm 3200, User Manual

Page: 17 / 174

Part number HA028582. Issue 6.0 May-07 15
2.7 Remote Setpoint Input
•
There are two inputs; 4-
20mA and Volts which
can be fitted in place of
digital communications
•
It is not necessary to fit
an external burden
resistor to the 4-20mA input
•
If the 4-20mA remote setpoint input is connected
and valid (>3.5mA; < 22mA) it will be used as the
main setpoint. If it is not valid or not connected the
controller will try to use the Volts input. Volts
sensor break occurs at <-1; >+11V. The two inputs
are not isolated from each other
•
If neither remote input is valid the controller will
fall back to the internal setpoint, SP1 or SP2 and
flash the alarm beacon. The alarm can also activate
a relay if configured or read over digital
communications. See Engineering Handbook
HA027986
•
To calibrate the remote setpoint, if required, see the
Engineering Handbook HA027986
•
A local SP trim value is available in a deeper level
of access. See Engineering Handbook HA027986
2.8 Output 3
Output 3 is not available in model 3216. In 1/8 and
1/4 DIN controllers it is either a relay or a mA output.
Relay Output (Form A, normally open)
•
Isolated output 240Vac CATII
•
Contact rating: 2A 264Vac resistive
•
Output functions: Heating, or cooling,
or alarm or motorised valve open or
closed
DC Output
•
Isolated output 240Vac CATII
•
Software configurable: 0-20mA or 4-
20mA
•
Max load resistance: 500
Ω
•
Calibration accuracy: +(<0.25% of
reading + <50
μ
A
•
Output functions: Heating, or cooling, or
retransmission.
+
-
OP3
3A
3B
OP3
3A
3B
Volts
4-20 mA
Common
HD
HE
HF