Power Supply Connector; Rs-232C Serial Interface Connector; Power Supply Connector Details - Lakeshore 642 User Manual

7.10.4

Power Supply Connector

The Power Supply connector provides the means to connect a water control valve (24 VAC) and an associated water
flow switch (closed during flow) to protect the Model 642 from loss of water flow. Pins 1 & 2 must be closed for normal
operation. Pins 3 & 4 supply 24 VAC at 1 A for operation of a water control valve.
7.10.5

RS-232C Serial Interface Connector

This connector provides one of two means of computer interface. Command descriptions are found in Section 5.
Model 642 Electromagnet Power Supply
DE-9P (DTE)
Pin
1 NC
2 Receive Data (RD in)
3 Transmit Data (TD out)
4 Data Terminal Ready (DTR out)
5 Chassis-common
6 Data Set Ready (DSR in)
7 Data Terminal Ready (DTR out) (tied to 4)
8 NC
9 NC
Service
Lake Shore Model 642 Electromagnet Power Supply User's Manual
Pin
1 Flow Switch (Com)
2 Flow Switch
3 Power Supply Water Valve A
4 Power Supply Water Valve B
Figure 7-10. Power Supply Connector Details
1
5
Description
Figure 7-11. RS232C (DTE) Connector Details
1
4
Name
6
9
Typical Computers
DB-25P (DTE)
Pin Description
2 TD (out)
3 RD (in)
4 RTS (out)
5 CTS (in)
6 DSR (in)
7 GND
8 DCD (in)
20 DTR (out)
22 Ring in (in)
DE-9P (DTE)
Pin Description
1 DCD (in)
2 RD (in)
3 TD (out)
4 DTR (out)
5 GND
6 DSR (in)
7 RTS (out)
8 CTS (in)
9 Ring in (in)
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