MKS 651D Series User Manual

Chapter Two: Installation Connectors
21
Interface (I/O) Connector
The 37-pin female Type “D” Interface (I/O) connector provides access to the set points, process
relay limits, softstart control, and the valve control functions.
Interface Connector Pinout
Pin Number Assignment Pin Number Assignment
1 PLO 1 - NC contact 20 PLO 1 - common contact
2 PLO 1 - NO contact 21 PLO 2 - common contact
3 PLO 2 - NC contact 22 PLO 2 - NO contact
4 Digital ground 23 Valve closed status (hi = closed)
5 Reserved 24 Learn Valve (low)
6 Analog set point position control
Hold both pins 6 and 11 low.
25 Remote zero (low)
7 Softstart (low) 26 Stop valve (low)
8 Close valve (low) 27 Open valve (low)
9 Analog input channel select
hi = Channel 1; low = Channel 2
28 (output) PLO 2 status
(low = out of limit)
10 Analog set point ÷ 10 29 (output) PLO 1 status
(low = out of limit)
11 Analog set point control
Hold only pin 11 low to select
pressure control.
Hold both pins 6 and 11 low to
select position control
30 +15 V Output
12 Select set point E (low) 31 -15 V Output
13 Select set point D (low) 32 Power ground
14 Select set point C (low) 33 + Set point input
15 Select set point B (low) 34 - Set point input*
16 Select set point A (low) 35 Analog ground*
17 Zeroed pressure output voltage
for low range transducer
(Channel 2)
36 Zeroed pressure output voltage
for high range transducer
(Channel 1)
18 Reserved 37 Position output voltage
19 Valve open status (hi = open)
* The analog set point must be referenced to analog ground. If you are using an absolute

MKS 651D Series Specifications

General

Brand	MKS
Model	651D Series
Category	Controller
Language	English