6-10 REMOTE/AUTOMATED CONTROL
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Pin
Number
Description
18
DB-37 control select. The pin is connected to common pin 7
or 8 to enable the DB-37 connector. When the connection is
left open, the DB-25 is active.
19
Run Fault. When the Auto Controller is enabled, this pin will
indicate a run fault if it is at a high logic level of 5 volts. If
there is no run fault, then this pin will be at a low logic level
of 0 volts
20
Discharge Current Output. 0-5 volts corresponds with 0 to
the maximum level of discharge current in amps for the Dis-
charge Power Supply that is being used.
21
Discharge Voltage Output. 0-5 volts corresponds with 0 to
the maximum level of discharge voltage in volts for the Dis-
charge Power Supply that is being used.
22
Discharge Current Setpoint. 0-5 volts corresponds with 0
to the maximum level of discharge current in amps for the
Discharge Power Supply that is being used.
23
Beam Good 1. Shorted to pin 24 when the operating param-
eters are in range.
24
Beam Good 2. Shorted to pin 23 when the operating param-
eters are in range.
25
No Contact
26
No Contact
27
Gas
fl
ow Output common. Return for gas
fl
ow output pins
8, 9, 28 and 29.
28
Channel 2 gas
fl
ow Output. 0-5 volt corresponds with 0 to
the maximum output in sccm for the channel 2 MFC. Refer-
enced to pin 27.
29
Channel 4 gas
fl
ow Output. 0-5 volt corresponds with 0 to
the maximum output in sccm for the channel 4 MFC. Refer-
enced to pin 27.
30
Channel 2 setpoint. 0-5 volts corresponds with 0 to the max-
imum output for the MFC connected to Channel 2. Refer-
enced to pin 13.
31
Channel 4 setpoint. 0-5 volts corresponds with 0 to the max-
imum output for the MFC connected to Channel 4. Refer-
enced to pin 13.
