W&T 85210 User manual

W&T
Manual
RS232 T-Box
Release 1.0
Typ 85210

W&T
2
© 06/2002 by Wiesemann und Theis GmbH
Subject to error and alteration:
Since it is posssible that we ma e mista es, you mustn’t use
any of our statements without verification. Please, inform us of
any error or misunderstanding you come about, so we can iden-
tify and eliminate it as soon as possible.
Carry out your wor on or with W&T products only to the ex-
tent that they are described here and after you have completely
read and understood the manual or guide. We are not liable for
unauthorized repairs or tampering. When in doubt, chec first
with us or with your dealer.

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W&T
WWW.WUT.DE
RS232T-Box
# 85210
1. Function
The W&T RS232 T-Box #85210 allows bi-directional interconnection of three de ices with RS232
interfaces. The T-Box has 2 RS232 ports with DTE assigned (Port A and B), with their plug-in connectors
attached directly to the T-Box housing, and one port with DCE assigned (Port C) which is connected to
the T-Box with a 2-meter cable.
The T-Box supports a data line and a hardware handshake line in each direction at each port. Data can
be transferred either between connections A and C or between connections B and C; a direct link between
connections A and B is not possible. Data and handshake signals from Port C are transmitted to both
Port A and Port B; the signals for Ports A and B are interconnected logically and output to Port C. The
interface multiplier has no conflict protection, so the user must ensure that only one of the de ices
connected to Ports A and B is sending data at a time.
The T-Box gets its energy from the signal lines, so that no additional external power supply is needed.
The T-Box consumes so little power that the de ices can be cascaded without problem in order to obtain
a greater number of inputs.
2. Connectors
All three ports of the W&T RS232 T-Box 85210 use DB25 connectors. The connector pin assignments
are shown in the table below:
3. Application
PC network via RS232 with hardware handshake control
3
2
5
8
6
4
PC (Slave)
2
3
7
5
6
20
TxD
RxD
GND
CTS
DSR
DTR
DB9 male
PC (Slave)
DB25 male DTEDB25 female DTE DB25 female DTE
85210
3
2
7
20
5
Port A
Port B
Port C
3
2
7
20
5
TxD
RxD
GND
CTS
DSR
DTR
2 3 7 5 20
2 3 7 5 6
20
PC (Master)
TxD RxD GND CTS DSR DTR
DB25male DTE
RS232 interface A and B
(DB25 female)
RS232 interface C
(DB25 male)
function
Data In
Data Out
Handshake Out
Signal GND
Handshake In
pin#
2
3
5
7
20
function
Data Out
Data In
Handshake In
Signal GND
Handshake Out
pin#
2
3
5
7
20

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W&T
WWW.WUT.DE
5. Technicaldata
Baudrate: 0..115200Baud
Data format: any data format
RS232signals: RxD,TxD, CTS,DTR
Powersupply: not necessary
Inputimpedance: > 20 kW
RS232interfaces: Port A and B: DB25 femaleconnector,DTEpin assignment
Port C: DB25male connector,DCE pinassignment
Housing/ Dimensions: Small plastic housing, 63 x 54 x16 mm
Weight: 150 g incl. cable
Packing list: 1 xRS232T-Box,type 85210
RS232T-Box
# 85210