Rs232 Interface - Elo TouchSystems E247 Operation Manual

3.2

RS232 interface

There are three different ways how to use the multiplexer ELO E246, E247 or
E248 with RS232 interfaces:
1 - Four independent duplex channels with RS232 interface. Firs with signals
TxD1 and RxD1 (contacts 6,1), second with signals TxD2, RxD2 (contacts 7,2),
third TxD3, RxD3 (contacts 8,3) and fourth TxD4 and RxD4 (contacts 9,4).
Contact 5 - GND is common for all channels. When the cable ELO E24E is used
each channel has its own standard connector DB9F with the signals RxD (contact
2), TxD (contact 3) and GND (contact 5).
2 - One duplex line, transmitting data (TxD and RxD) through the channel e.g.
(No.1) and accompaniing control and status signals, RTS, CTS, DTR, DSR and
DCD through the rest of channels.
3 – Two duplex lines, each uses one channel for data and second one for control
and status signal - handshake (e.g. RTS-CTS, or DTR-DSR).
The data rate is allowed in range from 0 to 230 000 bps.
The cable between end device and multiplexer must not exceed 15 m.
contact signal
1 RxD1
2 RxD2
3 RxD3
4 RxD4
5 GND
6 TxD1
7 TxD2
8 TxD3
9 TxD4
meaning
received data of the 1st RS232
received data of the 2nd RS232
received data of the 3rd RS232
received data of the 4th RS232
common signal ground
transm. data of the 1st RS232
transm. data of the 2nd RS232
transm. data of the 3rd RS232
transm. data of the 4th RS232
4
ELOE246,7,8,9,A,BZKE001
direction
from the multiplexer
from the multiplexer
from the multiplexer
from the multiplexer
into the multiplexer
into the multiplexer
into the multiplexer
into the multiplexer