MKS Baratron 631D, Instruction Manual, Page: 41 / 64

Chapter Three: Overview
33
Interface Connector
The Interface connector (J1) is a 15-pin male type D-subminiature connector. Refer to Figure 2:
Top View of the Type 631D Transducer, page 30, for the location of the Interface connector for
the 631D without the optional relay system. Refer to Figure 3: Top View of the Type 631D
Transducer With Optional Relay System, page 31, for the location of the Interface connector for
the 631D without the optional relay system. It contains the pins to connect the 631D unit to a
power supply or power supply/readout. Table 6 specifies the pinout of the Interface connector.
Note
The state of the relay contacts at pins 13, 14 are for an energized heater
alarm relay (normal operation) – refer to Heater Status LEDs and Heater
Alarm Relay, page 40 for a description of relay functionality. To use a
631D transducer with any non-MKS power supplies or power
supply/readouts, consult the manufacturers’ specifications for electrical
and power considerations, and Appendix A: Product Specifications
, page
49 , for electrical requirements of the 631D transducer.
Pinouts of the Interface Connector (J1)
Pin Number Assignment Without Relay System Assignment With Relay System
1
No Connection Trip Point A Relay N/O
2
Pressure Output Pressure Output
3
No Connection Trip Point A Relay Common
4
No Connection Trip Point A Relay N/C
5
15 V Return 15 V Return
6
-15 VDC -15 VDC
7
+15 VDC +15 VDC
8
No Connection Trip Point B Relay N/O
9
No Connection Trip Point B Relay Common
10
No Connection Trip Point B Relay N/C
11
Heater Alarm Relay Common Heater Alarm Relay Common
12
Pressure Output Return Pressure Output Return
13
Heater Alarm Relay Open [when
energized]
Heater Alarm Relay Open [when
energized]
14
Heater Alarm Relay Closed [when
energized]
Heater Alarm Relay Closed [when
energized]
15
Chassis Ground Chassis Ground