1651 Pressure Controller Pin-outs

Valve Connector - Please Consult Factory

Serial RS-232 Connector
Pin Description
1 No Connection
2 Transmit Data
3 Receive Data
4 No Connection
5 Digital Ground
6 Reserved
7 Reserved
8 No Connection
9 No Connection
I/O Connector
Pin Description
1 PLO Relay #1 - NC contact
2 PLO Relay #1 - NO contact
3 PLO relay #2 - NC contact
4 Digital Ground
5 Learn system (Low)
6 Hold both pin 6 and 11 Low to select analog set point with position control
7 Softstart (Low)
8 Close valve (Low)
9 Reserved
10 Analog set point divided by 10
11 Hold only pin 11 low to select analog set point with pressure control
Hold both pin 6 and 11 low to select analog set point with position control
12 Select set point E (Low)
13 Select set point D (Low)
14 Select set point C (Low)
15 Select set point B (Low)
16 Select set point A (Low)
17 Reserved
18 Reserved
19 Valve open status (Hi=open)
20 PLO relay 1 - common contact
21 PLO relay 2 - common contact
22 PLO relay 2 - NO contact
23 Valve closed status (Hi=closed)
24 Reserved
25 Remote zero (Low)
26 Stop valve (Low)
27 Open valve (Low)
28 PLO #2 status (Low=out of limit)
29 PLO #1 status (Low=out of limit)
30 +15 V Output
31 -15 V Output
32 Power Ground
33 + Set Point Input
34 - Set Point Input
35 Analog Ground
36 Pressure Output Voltage
37 Position Output Voltage
Transducer Connector
Pin Description
1 +15 V Supply
2 + Pressure Input
3 Reserved
4 Reserved
5 Power Ground
6 -15 V Supply
7 +15 V Supply
8 Reserved
9 -15 V Supply
10 Reserved
11 Digital Ground
12 - Pressure Input
13 Reserved
14 Reserved
15 Chassis Ground
Power Connector
Pin Description
1 +15 Volts
2 Reserved
3 Reserved
4 -15 Volts
5 Power Ground
6 +15 Volts
7 Chassis Ground
8 -15 Volts
9 Power Ground

Need help?

Contact an Application Specialist by sending an email to MKS Instruments or call 978-645-5500.