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3.5 COMPUTER SERIAL COMMUNICATIONS
The ANAFAZE 12LS offers two types of serial communications: RS- 232 and RS-485. The RS-232 is used primarily
for local communications of up to the recommended RS-232 distance of 50 feet. It can only be used with one
ANAFAZE 12LS. More than one unit requires RS-485
The RS-485 is a voltage balanced, 4-wire, long distance, multi- point transmission interface. Up to 32 addresses can be
set in the 12LS for one communication line.
Units must be ordered for the RS-485 communications, otherwise the factory standard of RS-232 will be supplied with
the ANAFAZE 12LS.
3.5.1 RS-232 CONNECTIONS
The optically-isolated RS-232 interface is connected using the Communications terminal block 1. See
Table 3-3
for
connections.
|--------------------------------------------------------------|
¦ TABLE 3-3. RS-232 CONNECTIONS ¦
|--------------------------------------------------------------¦
¦ Computer Connector ¦ 12 LS ¦
|------------------------------¦ TB 1 Pin Nr. ¦
¦ DB 25 ¦ DB 9 ¦ ¦
|--------------¦---------------¦-------------------------------¦
¦ RX Pin 3 ¦ RX Pin 2 ¦ TX Pin 26 ¦
¦ TX Pin 2 ¦ TX Pin 3 ¦ RX Pin 25 ¦
¦ GND Pin 7 ¦ GND Pin 5 ¦ GND Pin 23 ¦
|--------------------------------------------------------------|
The computer pins are for the normal 25 pin RS-232 connector [DB25] and the normal 9 pin connector [DB9]. On
some computers transmit TX and receive RX may be reversed. Please check your computer manual for details.
3.5.2 OTHER RS-232 LINES
Some host computers or other RS-232 devices use additional communication lines that are not required by the 12LS.
These include:
RTS - Ready to Send DSR - Data Set Ready
CTS - Clear To Send DTR - Data Terminal Ready
If the host computer uses RTS and CTS or DSR and DTR, these lines should be connected together in pairs [or as
shown in the computer manual]. Normally this is done in the RS-232 connector hood at the host computer.
Alternately, the effect of these lines can be eliminated in software. The ANAFAZE 12LS is ready to receive data;
therefore these lines are not required.
- 1.0 INTRODUCTION 8
- 2.0 SPECIFICATIONS 12
- 3.0 INSTALLATION 15
- 3.1.2 EXTERNAL WIRING 18
- 3.1.4 RECOMMENDED CABLES P/N 20
- 3.3.4 SOURCE IMPEDANCE 24
- 3.3 ANALOG INPUTS 24
- 3.3.1COMMON MODE VOLTAGE 24
- 3.3.2NORMAL MODE VOLTAGE 24
- 3.3.3GROUNDING 24
- 3.3.5 INPUT SCALING 25
- 3.3.6 VOLTAGE INPUTS 26
- 3.3.7MILLIAMP INPUTS 26
- 3.3.8THERMOCOUPLE INPUTS 26
- 3.3.9RTD INPUTS 27
- 3.4 CONTROL OUTPUTS 28
- 3.4.2 PID OUTPUT LIMITING 29
- 3.5.1 RS-232 CONNECTIONS 30
- 3.5.2 OTHER RS-232 LINES 30
- 3.5.3 RS-485 DESCRIPTION 31
- 4.1 FRONT PANEL KEYS 36
- 4.2 DISPLAYS 37
- 4.2.1 BAR GRAPH DISPLAY 37
- 4.2.2 SINGLE LOOP DISPLAY 38
- 4.2.3 SCANNING DISPLAY 39
- 4.2.4 ALARM DISPLAY 40
- 4.4 OPERATIONAL MENUS 42
- 4.4.1 CHANGE SETPOINT 42
- 4.4.2 SET LOOP TO MANUAL/AUTO 43
- 4.5 SETUP MENUS 44
- 4.5.2 SETUP LOOP INPUT 52
- 4.5.4 SETUP LOOP OUTPUTS 58
- 4.5.5 SETUP ALARMS 61
- 4.5.6 MANUAL I/O TEST 65
- 5.0 PID CONTROL 92
- 6.0 SOFTWARE 98
- 9.0 GLOSSARY OF TERMS 106
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