Main logic card screws – Datamax-O'Neil A-Class Mark II Operator’s Manual User Manual
Page 23
A-Class Mark II
13
COM D Port Connections
COM D RS-232 Cable
Host DB-9S
Printer RJ45P
1
RXD
TXD
+5 VDC
GROUND
TXD
RXD
+5 VDC
GROUND
DTR
DSR
CTS
CTS
DTR
RTS
2
7
8
4
5
3
1
2
3
4
5
6
8
7
9
NC
6
NC
NC
Part # 32-2603-00
2.3.3 RS-422/485 Communications
To use RS-422/485 communications (Port A, only), the main logic card must be reconfigured:
Always wear a wrist strap and follow standard ESD prevention measures when
handling the Main Logic Card.
1. Turn OFF the power switch, unplug the AC Power Cord from the printer, and remove any
interface cable(s) already attached to the Main Logic Card.
2. Remove the two Screws securing the Main Logic Card to the printer. Slide the card out of
the printer and place it on a static free work area.
Main Logic Card
Screws
The Main Logic Card location varies depending upon the model of printer.
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