Roche Cobas C111 - RS-232 Serial Cable Specifications; Maximum Cable Length

cobas c 111
Host Interface Manual
Version
2
.1
17 / 93
5.2 RS-232 serial cable specifications
Figure2 and 3 shows the two possible wiring diagram of the
connection cable between the analyzer and the host.
The plug for the RS232 host interface cable is the topmost
RS232 connector on the right side of the analyzer (marked as
“Host”).
You can use the “industry standard “null modem cable or the
second one that can be ordered from the Roche stock and is
also used for other instruments i.e. cobas Amplicor.
5.2.1 Maximum cable length
The maximum cable length is 15 m
Figure2 : Host Interface Null modem Connection Cable
Figure3 : Host Interface Connection Cable GMMI 28053391001
Standard Null-Modem.
Host Cable wiring diagram for DB-9 type plug
Analyzer Host
Sig. Pin Sig. Pin
TxD 3 RxD 2
RxD 2 TxD 3
RTS 7 CTS 8
CTS 8 RTS 7
DTR 4 DCD 1
DSR 6 DSR 6
DCD 1 DTR 4
RI 9 RI 9
GND 5 GND 5
Note Max cable len
g
th = 15 m
Host Cable wiring diagram for DB-9 type plug
Analyzer Host
Sig. Pin Sig. Pin
TxD 3 RxD 2
RxD 2 TxD 3
RTS 7 DCD 1
CTS 8 DTR 4
DSR 6 CTS 8
DTR 4 DSR 6
DCD 1 RTS 7
RI 9 RI 9
GND 5 GND 5
Note cable len
g
th = 3 m