Wiring To Control Terminals; Using Shielded Control Cables - GE AF-650 GP Design And Installation Manual

Installation
Terminal Parameter
50
2 2
53
54
55
Table 2.4 Terminal Description Digital Inputs/Outputs,
Analog Inputs/Outputs
Terminal Parameter
61
68 (+)
69 (-)
01, 02, 03
04, 05, 06
Table 2.5 Terminal Description Serial Communication

2.5.5.3 Wiring to Control Terminals

Control terminal connectors can be unplugged from the
frequency converter for ease of installation, as shown in
Illustration 2.11.
1. Open the contact by inserting a small screwdriver
into the slot above or below the contact, as
shown in Illustration 2.13.
2. Insert the bared control wire into the contact.
3. Remove the screwdriver to fasten the control wire
into the contact.
4. Ensure that the contact is firmly established and
not loose. Loose control wiring can be the source
24
Terminal description
Default
setting Description
Digital inputs/outputs
– +10 V DC 10 V DC analog
supply voltage. 15 mA
maximum commonly
used for potenti-
ometer or thermistor.
AN-1# Reference Analog input.
Selectable for voltage
AN-2# Feedback
or current. Switches
A53 and A54 select
mA or V.
– Common for analog
– input.
Terminal description
Default
setting Description
Serial communication
– Integrated RC-Filter for
cable screen. ONLY for
connecting the shield
when experiencing
– EMC problems.
O-3# – RS485 Interface. A
control card switch is
O-3#
provided for
– termination resistance.
Relays
[0] No
Form C relay output.
E-24 operation
Usable for AC or DC
E-24 [0] No voltage and resistive
operation or inductive loads.
of equipment faults or less than optimal
operation.
See chapter 12 Terminal and Applicable Wire for control
terminal wiring sizes.
Illustration 2.13 Connecting Control Wiring

2.5.5.4 Using Shielded Control Cables

Correct screening
The preferred method usually is to secure control and
serial communication cables with screening clamps
provided at both ends to ensure best possible high
frequency cable contact.
If the ground potential between the frequency converter
and the PLC is different, electric noise may occur that
disturbs the entire system. Solve this problem by fitting an
equalizing cable next to the control cable. Minimum cable
cross-section: 16 mm
1
Minimum 16 mm
2 Equalizing cable
Illustration 2.14 Correct Screening
50/60 Hz ground loops
With long control cables, ground loops may occur. To
eliminate ground loops, connect one end of the screen-to-
ground with a 100 nF capacitor (keeping leads short).
Illustration 2.15 50/60 Hz Ground Loops
DET-767c All rights reserved.
2
(6 AWG).
2
(6 AWG)
MG35M402