Control Terminal Functions; Terminal 53 And 54 Switches - GE AF-650 GP Design And Installation Manual

Installation
50/60 Hz ground loops
With very long control cables, ground loops may occur. To
eliminate ground loops, connect one end of the shield-to-
ground with a 100 nF capacitor (keeping leads short).
Figure 2.22
Avoid EMC noise on serial communication
This terminal is grounded via an internal RC link. Use
twisted-pair cables to reduce interference between
conductors. The recommended method is shown below:
Figure 2.23
1 2 2
Min. 0.025 in [16 mm ]
2 Equalizing cable
Table 2.6
Alternatively, the connection to terminal 61 can be
omitted:
Figure 2.24
2 2
1
Min. 0.025 in [16 mm ]
2 Equalizing cable
Table 2.7
TM
AF-650 GP Design and Installation Guide

2.5.5.5 Control Terminal Functions

Adjustable frequency drive functions are commanded by
receiving control input signals.
•
•
•

2.5.5.6 Terminal 53 and 54 Switches

•
•
•
•
•
•
DET-767A
Each terminal must be programmed for the
function it will be supporting in the parameters
associated with that terminal. See Table 2.4 for
terminals and associated parameters.
It is important to confirm that the control
terminal is programmed for the correct function.
See 4 User Interface for details on accessing
parameters and 5 About Programming for details
on programming.
The default terminal programming is intended to
initiate adjustable frequency drive functioning in
a typical operational mode.
Analog input terminals 53 and 54 can select
either voltage (-10 to 10 V) or current (0/4–20
mA) input signals
Remove power to the adjustable frequency drive
before changing switch positions.
Set switches A53 and A54 to select the signal
type. U selects voltage, I selects current.
The switches are accessible when the keypad has
been removed (see Figure 2.25). Note that some
option cards available for the unit may cover
these switches and must be removed to change
switch settings. Always remove power to the unit
before removing option cards.
Terminal 53 default is for a speed reference signal
in open-loop set in DR-61 Terminal 53 Switch
Setting
Terminal 54 default is for a feedback signal in
closed-loop set in DR-63 Terminal 54 Switch
Setting
2 2
2-13