Motorized Valve Connections; Input Connections - ABB C505 User Manual

...5 INSTALLATION
5.6 Motorized Valve Connections – Fig. 5.11
Note. Relays used to drive the motorized
valve must be set for 'Normally Open' operation –
see Section 5.3.1.
12
13
14
15
A – Relay Connections
Motorized
100Ω
Valve
(mA inputs
Drive
only)
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 wire link must be
connected at the motorized valve end,
NOT to the instrument terminals.
Fig. 5.11 Motorized Valve Connections
88
Motorized Valve
Drive
0%
100%
(N)
Valve
N
Positioner
Power
L
Supply
(L)
–
+
Link
19
20
21
Connection
Link
19
20
21

5.7 Input Connections

Make connections to each input – see Fig 5.8.
Refer to rear fold-out/ Table A – Template
Applications 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. 5.12.
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. 5.13.
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
19
linearizer is selected. This is only possible via the PC
20
configurator.
CJ sensor,
I/P 3
Note. Only fit a CJ sensor to I/P 3 if
the option board is also fitted.
Fig. 5.12 CJ Sensor – Connections
–
19
+
20
21
I/P3
Fig. 5.13 Remote-mounted CJ Sensor –
Fitting the
CJ sensor
to I/P 1
Compensating
Copper
cable
cable
–
1
+
2
3
I/P1
Connections