Connection A (P1) - Logic Input Interconnections - Varian Turbo-V 550 PCB Bedienungshandbuch

Connection A (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 hand held terminal
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 hand
held terminal push-button is inoperative.
3-8 INTERLOCK optically
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.
isolated from the
52
TECHNICAL INFORMATION
Pin 3-8 must be shorted to allow the Turbo-V550 pump
to start if no interlock
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
NOTE
contact is connected.
+24 V
87-900-885-01 (B)