Emerson Bettis Q series, Руководство по установке

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6
Bettis Q-Series Installation Guide
February 2017 DOC.IG.BQC44.1 Rev. 1
0.5W
Fig. 4.3 Default Pilot valve wiring connections
4.1 Connecting Pilot valve(s)
The Control Module can be equipped with one or
two pilot valves:
* One pilot valve is default and suitable for normal
operation of double acting or spring return
actuators
* Two pilot valves are required for Fail in Last
Position for double acting actuators.
IMPORTANT
For hazardous area installations see instructions in
Chapter 11.
1. Before connecting the pilot valve, check the
voltage on the control module label.
2 Remove control module cover (see figure 4.1).
3 Guide the cable(s) through the electrical
entry(ies).
- Use and mount cable glands as required by
national or local legislation.
4 For normal operation, make the electrical
connections as shown in figure 4.3.
For double acting actuators with Fail in
Last Position function, make the electrical
connections as shown in figure 4.4
5 Mount the control module cover to the housing
(see figure 4.1) or continue with chapter 5. Take
care that the cover seal is in place to comply to
dust and water tightness according to IP66 or
NEMA4X.
6 Lock the cover in position by turning the lock
screw in, until it blocks.
4.1.1 Tools
Table 4.1 Tool table
For terminals Screw driver 0.6 x 3.5
Cover lock screw Allen key nr 2
4.1.2 Typical functional ratings Pilot Valve
The pilot valve inside the Control Module sends the
actuator to its open or closed position.
IMPORTANT
The below mentioned typical functional ratings are
applicable for non-hazardous areas.
Cable range:
0.2 - 2.5mm
2
or
30-12AWG
0.5W
Cable range:
0.2 - 2.5mm
2 or
30-12AWG
Fig. 4.4 Pilot valve wiring connections for
Fail in Last Position
Table 4.2 Typical functional ratings Pilot Valve
Voltage Turn on V 16.4 ... 28
Turn off V 5.7
Current Turn on mA 25mA±10%
Turn off mA 7
Coil Resistance = 563 (T
a
+ 234 + 10)
254