MPCe/LPCe Users Manual
38
Set Point/Analog Output, J104
J104 is a 37-pin, female Sub-D connector that provides connectivity for the MPCe’s or LPCe’s 8 set point signals
and 4 voltage/current analog output signals.
Pin
Set Point Signals
Pin
Analog Output Signals
1
Set Point 1 (Relay)
Common 20
HV1 On Indicator (5V)
2
500 mA, 28V, max.
NC
21
HV2 On Indicator (5V)
3
NO
22 … 28 Unused
4
Set Point 2 (Relay)
Common 29
GND2
5
500 mA, 28V, max.
NC
30
Analog HV Supply 1
6
NO
31
GND2
7
Set Point 3 (Relay)
Common 32
Analog Current/Pressure Supply 1
8
500 mA, 28V, max.
NC
33
GND2
9
NO
34
Analog Current/Pressure Supply 2
10
Set Point 4 (Relay)
Common 35
GND2
11
500 mA, 28V, max.
NC
36
Analog HV Supply 2
12
NO
13, 14, 16, 18
GND1
15
Set Point 5 (TTL), 15 mA max.
17
Set Point 6 (TTL), 15 mA max.
19
Set Point 7 (TTL), 15 mA max.
37
Set Point 8 (TTL), 15 mA max.
Analog Current/Pressure Measuring (pins 32,34)
The analog voltage output representing current can vary depending on the mode selected in the software. A list
of these modes is given in the Supply Menu.
Jumpers on the internal CPU board assembly allow selecting positive or negative outputs. Contact Gamma
Vacuum technical support for additional information.
Analog High Voltage Measuring (pins 30, 36)
HV supply outputs 1 and 2 provide 0 to 10 volt signals with a scale factor of 1V/1000V output voltage.
High Voltage Status Indication (pins 20, 21)
Pins 20 and 21 indicate the status of the each high voltage supply. A zero volt signal represents an off condition.
The signal changes to +5 volts when high voltage is enabled from the front panel or serial command.
