Model
1000
Installation and Operation Manual
Page
19
OFFICIAL 6/1/2001
H
OW
D
O
I …
GET RUN, ZERO SPEED, FAULT AND ENABLE INFORMATION?
The RUN relay contact at TB2 terminals 1 and 2 is a dry
contact rated at 1 Amp (Resistive load) at 125VAC. You may
use it in an external circuit as long as the voltage does not
exceed 125 VAC (limitation of the terminal strip).
You may use an auxiliary relay if you need more power, or
if you need more contacts, as shown in the drawing at the left.
You should use a 48VDC coil (highly recommended) since this
reduces the burden on one supply. The diode is a general
purpose type rated for at least 1 Amp at 100VDC PIV (1N4002
or equivalent).
The ZERO SPEED output at TB2 terminal 16 is an open
collector NPN transistor, rated at 50 ma at 50 VDC. The
ZERO SPEED transistor turns on at about 10 RPM and turns
off at about 5 RPM
The transistor emitter is at drive common and it may
interface directly with a PLC as a sinking input.
The output can operate a relay as shown in the top
drawing on the left. The transistor returns to drive common, so
it is not possible to use a 48VDC relay with the drive’s
supplies. If you use a 24VDC relay, the current must be as low
as possible. The diode is a general purpose type.
The ZERO SPEED relay will chatter at very low speeds.
You can overcome this with a latching circuit that releases at
the first dropout of the zero speed relay.
The FAULT output at TB1 terminals 12 and 13 is the
output transistor of an optical coupler. The coupler’s rating is
100VDC @ 50 ma.
Connect a FAULT relay with a 48VDC coil as shown in
the bottom figure at left. The external FAULT relay energizes
when the drive completes power-up and de-energizes when a
fault occurs. The diode is a general purpose diode.
The Model 1000 does not have a READY output or an
ENABLE output.
We can imitate an ENABLE relay by a combination of the
FAULT output and the RUN output. The RUN relay does not
drop out on a fault. The combination of the FAULT and the
RUN circuits shows that the drive is in the RUN mode and that
there is no fault.
The internal RUN relay drops out on RAMP STOP.
Therefore, do not use the ENABLE relay, as shown in the
diagram, to control dynamic braking or contactor functions.
TB2
16151413121110987654321 1817
RUN
RUN RELAY
AUXILIARY
48VDC Coil
ZERO SPEED
RELAY
24VDC Coil
ZERO
SPEED
TB1
16151413121110987654321
FAULT
OUTPUT
ISOLATOR
48V
DC
48V
DC
+24VDC
FROM TB2
TERM 17
4321
TB2
RUN
5
ENABLE
FAULT
-24VDC
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