TECHNICAL INFORMATION
52
87-900-854-01 (C)
Connection P1 - Logic Input Interconnections
P1 input connector
All the logic input to the controller
must
be connected
at J-1 mating connector.
With the provided J1 mating connector (shipped with
pin 3 and pin 8 shorted) make the connections with
AWG 24, (0.24 mm
2
) or smaller wire to the pins
indicated in the figure to obtain the desired capability.
The following table describes the signals available on
the connector.
1-6
Remote START/STOP optically isolated from
the internal circuit, requires a permanently
closed contact (relay contact. transistor, etc.).
When the contact closes, the turbopump
starts, and when the contact opens, the
turbopump is stopped. With the remote mode
operation selected, the front panel push-
button is inoperative.
2-7
Remote LOW SPEED optically isolated from
the internal circuit, requires a permanently
closed contact (relay contact, transistor. etc.).
When the contact closes, the turbopump runs
at low speed and when the contact opens, the
turbopump reverts to high speed mode. With
the remote mode operation selected, the front
panel push-button is inoperative.
3-8
INTERLOCK optically isolated from the
internal circuit, this signal can be used to
delay the starting of the turbopump. It
requires a permanent closed contact before
starting the turbopump.
4-9
SYSTEM OVERRIDE optically isolated from
the internal circuit, this signal is used to stop
the pump in emergency condition, requires a
closed contact.
When the contact is closed, the turbopump
and the interconnected devices are stopped.
NOTE
Pin
3-8
must
be
shorted
to
allow
the
Turbo-V 250 PCB pump to start if no interlock contact
is connected. If, after starting the pump, the interlock
contact opens, it has no effect on the operation and the
pump continues to turn.
The following figure shows a typical contact logic input
connection and the related simplified circuit of the
controller.
Typical logic input connection
+24 V
