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REMOTE/AUTOMATED CONTROL 6-5
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Table 6-3. Pin descriptions for analog outputs on the DB-37 connector.
Pin
Number
Description
1
Emission Current Output. 0-5 volts corresponds with 0 to the maximum
Bias current in amps for the Emission Power Supply being used. Refer-
enced to pin 7 or 8.
6
Emission Voltage Output. 0-5 volts corresponds with 0 to the maximum
output voltage for the Emission Power Supply. Referenced to pin 7 or 8.
7
Common.
8
Common.
9
Channel 1 Gas Flow Output. 0-5 volts corresponds with 0 to the maxi-
mum output in sccm for the channel 1 MFC. Referenced to pin 27.
10
Channel 3 Gas Flow Output. 0-5 volt corresponds with 0 to the maxi-
mum output in sccm for the channel 3 MFC. Referenced to pin 27.
20
Discharge Current Output. 0-5 volts corresponds with 0 to the maximum
level of discharge current in amps for the Discharge 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 Discharge Power Supply that is
being used.
25
Keeper voltage output. 0-5 volts corresponds with 0-800 volts. Refer-
enced to common pin 7 or 8.
27
Gas
fl
ow Output common.
28
Channel 2 Gas Flow Output. 0-5 volts corresponds with 0 to the maxi-
mum output in sccm for the channel 2 MFC. Referenced to pin 27.
29
Channel 4 Gas Flow Output. 0-5 volts corresponds with 0 to the
maximum output in sccm for the channel 4 MFC. Referenced to pin 27.
37
Keeper current output. 0-5 volts corresponds with 0-2 amps. Referenced
to common pin 7 or 8.