Datamax H-Class Manual page 10

COM C (J4)
►
Recognized by the printer as Serial Port C, COM C functions as an auxiliary RS-232
interface or dedicated device port for the RFID and Linear Scanner options. Pin
assignments for the port are as follows:
At default settings, the COM C port automatically selects its function. To force a
selection, however, change the jumper settings as denoted in the table below:
Selected Function
RS-232 Communications (default)
RFID
Linear Scanner
Note: Jumper settings override menu settings: If set for RS-232 (default) with

the RFID and Linear Scanner menu-enabled, the printer will assign RFID to
Serial Port B (back plane port J13) and the Linear Scanner to the COM C
port.
COM D (J3)
►
Recognized by the printer as Serial Port D, COM D is an auxiliary RS-232 interface.
Pin assignments for the port are as follows:
Pin Number COM C (J4)
1 +5V (@ .5 amps)
2
3
4
5
6
7
8
9
COM C Jumper Setting Functions
JMP 12
On
Off
On
Pin Number COM D (J3)
1 +5V (@ .5 amps)
2
3
4
5
6
7
8
8
RX
TX
DTR
Ground
Ground
RTS
CTS
N/C
Jumper and Setting
JMP 13 JMP 14
On On
On On
Off On
RTS
Ground
TX
RX
Ground
CTS
DTR
JMP 15
On
On
On