Furness controls FCO770, Manual

Page: 79 / 101

FCO770 Users Guide Issue 1 Page 79
R
R
S
S
2
2
3
3
2
2
O
O
u
u
t
t
p
p
u
u
t
t
Note: RS232 connection to the instrument must be made using screened cable with the
screen connected to a metallic shell of the 'D' connector at the instrument end.
View looking at rear panel
1 5
9 6
9-way 'D' plug
PIN
1
2
3
4
5
6
7
8
9
INPUT/OUTPUT
No connection
Rx receive (input)
Tx Transmit (output)
DTR Data Terminal ready (output)
Ground
No connection
RTS Request to send (output)
CTS Clear to send (input)
No connection
Typical Printer Connections
FCO770 D Connector PRINTER D Connector
9-way 25-way 9-way
3 Tx 3 Rx 2 Rx
5 GND 7 GND 5 GND
8 CTS 20 DTR 4 DTR
Many serial printers use the DTR line to control data flow as shown here, however you
should check the printer’s specification.
Typical Computer Connections
FCO770 D Connector COMPUTER D Connector
9-way 9-way 25-way
2 Rx 3 Tx 2 Tx
3 Tx 2 Rx 3 Rx
5 GND 5 GND 7 GND
7 RTS 8 CTS 5 CTS
8 CTS 7 RTS 4 RTS
* 4 DTR 6 DSR 6 DSR
* 6 DSR 4 DTR 20 DTR
* These are not required but are normally made in a crossover cable. This type of cable is
often referred to as a “Null Modem” cable.