Rs232 / Rs422 / Rs485 - ELGO Electronic LIMAX2 Series Operating Manual

10.4 RS232 / RS422 / RS485*

*) Attention: RS485 only unidirectional
If the measuring system is equipped with an RS232, RS485 or RS422 interface, the data communication has the
following format:
19200 baud (other baud rates on request)
1 Start bit
8 data bits
1 stop bit
no parity
10.4.1 Data Protocol
The measured absolute position will be represented in the three ABS-position data bytes.
Version 2321 / 4221 / 4851
STX MSB
xxh
02h xxh
ABS position
Figure 30: Data Protocol Version 2321 / 4221 / 4851
Version 2320 / 4220 / 4850
STX MSB
02h xxh xxh
ABS position
Figure 31: Data Protocol Version 2320 / 4220 / 4850
10.4.2 Pin Assignment
Table 7: Pin Assignment
Open cable ends (Standard)
Color
White
Brown
Pink
Grey
Yellow
Green
Shield
LSB MSB LSB ETX
xxh yyh yyh 03h
Speed
LSB ETX
xxh 03h 00h 0Dh
RS232
0 V / GND
+ 24 VDC
TX
RX
-
-
PE
STX = starts a message
00h 0Dh
ETX = ends a message
STX = starts a message
ETX = ends a message
RS422
0 V / GND
+ 24 VDC
TX -
TX +
RX -
RX +
PE
- 32 -
Connections and Interfaces
RS485
0 V / GND
+ 24 VDC
TX -
TX +
PE