OEM Rebuilt MKS 651C Pressure Controller

Pressure Controller: 651C Self-Tuning/Digital PID

$1,500 OEM Rebuilt 90 day warranty. The MKS Instruments 651C self-tuning pressure controller provides a fast response to set point under varying operating conditions when operating Type 253 or 653 Valves. Includes integral power supply for valve and most general purpose transducers.

Model#: 651CD2S1N

MKS Instruments 651 Serial RS-232 Connector Specifications

NOTE:
The MKS RS-232 Serial communications cable (CB651-10-10) must be used for the 9 pin Serial Interface connector. Unlisted pins on this connector are not compatible with the Type "D" 9 pin, industry standard cable.

Pin Description

No Connection
Transmit Data
Receive Data
No Connection
Digital Ground
Reserved
Reserved
No Connection
No Connection

I/O Connector

PLO relay #1 - NC contact
PLO relay #1 - NO contact
PLO relay #2 - NC contact
Digital Ground
Learn system (Low)
Hold both pins 6 and 11 Low to select analog set point with position control
Softstart (Low)
Close valve (Low)
Reserved
Analog set point divided by 10
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
1Select set point E (Low)
Select set point D (Low)
Select set point C (Low)
Select set point B (Low)
Select set point A (Low)
Reserved
Reserved
Valve open status (Hi=open)
PLO relay 1 - common contact
PLO relay 2 - common contact
PLO relay 2 - NO contact
Valve closed status (Hi=closed)
Reserved
Remote zero (Low)
Stop valve (Low)
Open valve (Low)
PLO #2 status (Low=out of limit)
PLO #1 status (Low=out of limit)
+15 V Output
-15 V Output
Power Ground
+ Set point Input
- Set point Input
Analog Ground
Pressure output voltage
Position output voltage

Transducer Connector

Pin Description
+ 15 V Supply
+ Pressure Input
Reserved
Reserved
Power Ground
- 15 V Supply
+15 V Supply
Reserved
-15 V Supply
Reserved
Digital Ground
- Pressure Input
Reserved
Reserved
Chassis Ground