Connection P1 - Logic Input Interconnections - Varian Turbo-V 250 969-9423 Bedienungshandbuch

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
2
AWG 24, (0.24 mm ) 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.
PIN DESCRIPTION
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
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.
Pin
Turbo-V 250 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.
from the
53
TECHNICAL INFORMATION
NOTE
3-8 must be shorted
Typical logic input connection
to allow the
+24 V
87-900-852-01 (B)