Lake Shore 234, User Manual

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Lake Shore Model 234/234D User’s Manual
Remote Operation 4-1
CHAPTER 4
REMOTE OPERATION
4.0 GENERAL
This chapter covers the Serial Interface in Paragraph 4.1, and Serial
Interface Commands in Paragraph 4.2.
4.1 SERIAL INTERFACE
The Model 234 has a serial interface for communications with a host
computer. It is an unbalanced (single ended), non-terminated line used over
short distances (typically 10 feet or less). The Model 234 serial interface
complies with the electrical format of the RS-232C Interface Standard.
Table 4-1. Serial Interface Specifications
Type: RS-232C Electrical Format, Serial, Three Wire
Baud Rate: 9600
Timing Format: Asynchronous
Bits per Character: 1 Start, 8 Data, No Parity, 1 Stop
Parity Type: None
Voltage Levels: EIA
Terminators: Carriage Return (0DH) and Line Feed (0AH)
Connector: RJ11 Modular (Telephone) Jack
4.1.1 Serial Interface Connections
A standard 6 wire RJ-11 modular (telephone) jack is the serial interface
connector (see Figure 4-1). Lake Shore Model 2001 data type cables, which
maintain pin 1 polarity, simplify interconnection. Lake Shore offers the Model
2002 RJ-11 to DB-25 adapter and Model 2003 RJ-11 to DE-9 adapter for
connecting to the host computer. See Figure 4-2.
Figure 4- 1. Serial I/O
(RJ11) Connector
Pin Definitions
PIN DESCRIPTION
1
2
3
4
5
6 No Connection
Serial In (RxD)
Serial Ground
Serial Ground
Serial Out (TxD)
No Connection