Motorized Valve; Connections; Input Connections - ABB COMMANDER 351 User Manual

5.6 Motorized Valve

Connections – Fig. 5.10
Note. Relays used to drive the motorized
valve must be set for 'Normally Open' operation –
see Section 5.3.1.
5
6
7
8
9
A – Relay Connections
Motorized
100Ω
Valve
(mA inputs
Drive
B – Feedback Connections
(V, mA or mV Input Types)
Motorized Valve
Drive
100%
0%
C – Feedback Slidewire
Motorized Valve
Drive
0%
100%
D – Alternative Feedback
Slidewire Connection
Note. The
connected at the motorized valve end,
NOT to the instrument terminals.
Fig. 5.10 Motorized Valve Connections
Motorized
Valve
100%
Drive
0%
(N)
Valve
N
Positioner
Power
L
Supply
(L)
–
+
only)
Link
33
34
35
Connection
Link
33
34
35
wire link must be

5.7 Input Connections

Make connections to each input – see Fig 5.7.
Refer to Table A on the rear fold-out for the
default input assignment settings.
5.7.1 Thermocouple (THC) Inputs
Note. Use the correct compensating cable
between the THC and the terminals – see Table 5.1.
Automatic Cold Junction Compensation (ACJC) is
incorporated by use of CJ sensors wired across the
input terminals of I/P1 and I/P3 – see Fig. 5.11.
Alternatively, the CJ sensor can be mounted remotely
at the point where the thermocouple cable terminates
into copper cable, e.g. where cables enter an
instrument panel – see Fig. 5.12.
It is possible to use an external fixed cold (reference)
junction, if the instrument is programmed for use with
millivolt inputs and the appropriate thermocouple
linearizer is selected. This is only possible via the PC
33
Configurator.
34
Fig. 5.11 CJ Sensor – Connections
–
33
+
34
35
I/P3
Fig. 5.12 Remote-mounted CJ
5 INSTALLATION...
Compensating
Copper
cable
cable
–
28
+
29
30
I/P1
Sensor – Connections
79