Connection J2 - Logic Output Interconnections - Varian Turbo-V 300HT Instruction Manual

PIN DESCRIPTION
1-6 Remote START/STOP optically isolated from
the internal circuit, requires a
closed contact (relay contact.
etc. ). When
turbopump starts, and when the contact
opens. the turbopump is stopped.
the remote mode operation selected,
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
internal circuit, this signal can be used to
delay the starting
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 3-8 must be
Turbo-V 300HT 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
permanently
transistor,
the contact closes.
isolated from
of the turbopump.
NOTE
shorted to allow
Connection J2
Logic Output Interconnections
the
With
the
All the logic output from the controller must be
the
connected at P2 mating connector. With the optional
P2 mating connector make the connection with AWG
24 (0.25 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
1-2 Analog output Voltage of DC current drawn
by the turbopump (pin 2 positive,
negative). 2 Vdc proportional to 1A.
4-11 R1 signal 24 V, 60 mA, optically
output (pin 11 positive, pin 4
output Voltage will be present when the
the
rotational speed of the pump is higher than
the selected speed threshold.
5-12 LOW SPEED signal, 24 V, 60 mA, optically
isolated output (pin 12 positive, pin 5
negative). The output Voltage will be present
when the low speed mode is selected. either
through. the front panel. the remote signal, or
RS 232.
6-13 START signal 24 V, 60 mA, optically isolated
output (pin 13 positive, pin 8 negative). The
output Voltage will be present when the
START push-button on front panel is pressed
or the remote start is present. or the function
has been requested by
NORMAL operation is reached.
53
TECHNICAL INFORMATION
Logic output connector
DESCRIPTION
negative). The
RS 232, until
87-900-876-01 (B)
pin 1
isolated