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Cd 39 Helvetica CondensedHelvetica Appendix C— Communications Reference
EasyCoder 3400e Bar Code Label Printer User’s Manual 93
Shield
PC
Printer
9-Pin (Socket) D-Sub
Metal Backshell
25-Pin (Plug) D-Sub
Metal Backshell
Received Data
Transmitted Data
Clear to Send
Request to Send
Data Terminal Ready
Data Set Ready
Carrier Detect
Ground
Chassis Ground
Transmitted Data
Received Data
Carrier Detect
Data Set Ready
Data Terminal Ready
Clear to Send
Request to Send
Ground
2
3
8
7
4
6
1
5
1
2
3
8
6
20
5
4
7
3XXXU011.eps
RS-232 for PC/AT: This illustration shows the pin assignments for the RS-232 null
modem cable for PC/AT (P/N 048693).
Note: The metal backshell is connected directly to the shield to achieve
electrostatic discharge (ESD) immunity.
Shield
Printer
25-Pin (Socket) D-Sub
Metal Backshell
Chassis Ground
Transmitted Data
Received Data
Request to Send
Clear to Send
Data Terminal Ready
Signal Ground
25-Pin (Plug) D-Sub
Metal Backshell
Chassis Ground
Transmitted Data
Received Data
Request to Send
Clear to Send
Data Terminal Ready
Signal Ground
Modem
➤
➤
➤
➤
➤
1
2
3
4
5
20
7
1
2
3
4
5
20
7
3XXXU012.eps
Straight through DTE to DCE cable: This illustration shows the pin assignments for
the straight through DTE to DCE cable used with a modem (P/N 043237S). If you find
that you are losing data, you may need to isolate the chassis ground from one of the
two devices by connecting it to the shield.
Note: The metal backshell is connected directly to the shield to achieve
electrostatic discharge (ESD) immunity.