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10
Electrical Connections
WARNING
Before mounting or installing positioner, check nameplate
data to make certain positioner is suitable for application
desired. DO NOT AT ANY TIME EXCEED THE RATINGS LISTED
ON THE NAMEPLATE.
WIRING REQUIREMENTS
Under ideal conditions, the use of conduit and shielded wire
may not be required. However, to avoid noise problems, it is
recommended that wiring be enclosed in conduit. Just prior to
entering the housing, rigid conduit should be terminated and a
short length of flexible conduit should be installed to reduce
any stress.
RADIO FREQUENCY INTERFERENCE
Most electronic equipment is influenced by radio frequency in-
terference (RFI). Caution should be exercised with regard to
the use of portable communications equipment in the area.
ABB recommends posting appropriate signs in the plant. Refer
to the Site Planning and Preparation instruction for additional
information on RFI.
GROUNDING
Grounding positioners should be done in accordance with local
electrical codes (in U.S, National Electrical Code, ANSI/ NFPA
70. In Canada, Canadian Electrical Code, CSA c22.1). A ground-
ing screw is provided inside the AV enclosure for grounding.
NOTES:
1. The grounding screw located inside the AV enclosure is a
safety ground & should not be used to ground the shielded pair.
2. The positioner must be grounded to avoid ground loop con-
ditions.
Figure B-11A. Electrical Connections
Figure B-11. Wiring Connections
AVI and AV2 POSITIONERS | SOI/AV12 RE V. A
Type AV1 Positioner Wiring
This section applies to the following positioners:
• Type AV1_ _ _ _1_ _
• Type AV1_ _ _ _2_ _
NOTE:
1. For Type AV1_ _ _ _0_ _ no electrical wiring is required.
2. If using a twisted shielded pair for signal wiring, ground
one end of the shielded pair at the source. Trim the other
end of the pair, located inside the enclosure, so that bare
wires are not exposed.
1. If equipped with optional 4 to 20-mA position transmitter
(Type AV1_ _ _ _1_ _), connect a 24-VDC power supply in series
with the required output load (500 at 24 VDC, 1000 at 34
VDC) to terminals TB1-1 (+) and TB1-2 (-) (Fig. B-11). Refer to Ap-
pendix A of Installation Manual for detailed information about
position transmitters.
2. If equipped with optional potentiometric position transmit-
ter (Type AV1_ _ _ _2_ _), connect a power supply (maximum 35
VDC or 30 VAC) across TB1-1 and TB1-3. Use the signal across
TB1-1 and TB1-2 or TB1-2 and TB1-3 for position transmitter
feedback. Refer to Appendix A for detailed information about
position transmitters.
NOTE: Route the wiring inside the positioner so it does
not become entangled with moving parts. A cable clamp
(Fig. B-12) is provided inside the positioner so entangle-
ment can be avoided.
Type AV2 Positioner Wiring
This section covers the wiring connections for Type AV2
positioner:
1. Connect the 4 to 20mA position demand signal wires to
terminals TB1-4 (+) and TB1-5 (-) of the terminal block (Fig. B-
11). If you have a Type AV2_ _ _ _0_ _ positioner, go to Step 4.
NOTE: If using a twisted shielded pair for signal wiring,
ground one end of the shielded pair at the source. Trim
the other end of the pair, located inside the enclosure,
so that bare wires are not exposed.
2. If equipped with an optional 4 to 20-mA position
transmitter (AV2_ _ _ _2_ _), connect a 24-VDC power supply in
series with the required output load (500 at 24 VDC, 1000
at 34 VDC) to terminals TB1-1 (+) and TB1-2 (-).
3. If equipped with optional potentiometric position transmit-
ter (AV2_ _ _ _1_ _), connect a power supply (maximum 35 VDC
or 30 VAC) across TB1-1 and TB1-3. Use the signal across TB1-1
and TB1-2 or TB1-2 and TB1-3 for position transmitter feed-
back. Refer to Appendix A of Installation Manual for detailed in-
formation about position transmitters.
NOTE: Route the wiring inside the positioner so it
does not be-come entangled with moving parts. A ca-
ble clamp (Figure B-12) is provided inside the
positioner so entanglement can be avoided.
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