GE Industrial Solutions AF-300C AC Drive - Manual (Page 40)

GEK-85716
Alarm Reset Switch Connection
If an external RESET is required, connect a momen-
tary pushbutton to the RST terminal as shown in
Figure 4-10.
NOTE: The application of this terminal allows a
parallel operation to be performed with the
on the Keypad Panel. Carelessness when setting
Function Codes and/or retrieving faults may result in
inputting a RESET signal.
Equivalent Control Circuit
The equivalent circuit as shown in Figure 4-11 is pres-
ent in the control circuits (FWD, REV, BX, THR, RST,
PU, IL,
X2, X3, , RT2, The contacts used
must be highly reliable contacts for low voltage sig-
nals. 24 VDC is present when the switch is open; 3
DC is present when the switch is closed. The
maximum leakage current that can be tolerated and
still maintain an OFF state is 80
The maximum
voltage drop that can be tolerated and still maintain
an ON state is one volt.
Flgure 1. EQUIVALENT CONTROL
Fault Relay Contact Rating
The Fault Relay contacts are rated at 250 VAC, 300
milliamps inductive cos 0.3. When a large MC
Contactor is used, use a pilot relay with the appropri-
ate contact rating and coil rating. (See Figure 4-12.)
Open Collector Output Terminal Connection
It is recommended to use the optional relay output
unit when using these output signals, however it is
possible to use a customer furnished power supply
and relays. The open collector outputs are “sink
circuits. If customer supplied relays are to be con-
trolled, an external DC power supply (27 VDC max.) is
required. A diode must also be installed (reverse
biased) for relay coil suppression (see Figure 4-13).
CAUTION: that the of the power
supply connections are correct. Damaue will occur if
RESET
SWITCH
Figure 0. FAULT RESET CONNECTION
, . supplied.
Figure 4-12. FAULT RELAY CONTACTS
THAN
UP TO
(CUSTOMER
SUPPLIED)
Figure 4-13. OPEN COLLECTOR CONNECTION
4-8