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Host Interface Specification
Hardware Interface
Host (DTE) PC/AT or equivalent
Pin #, DB-9
1
2
3
4
5
6
7
8
9
Data Structure
Baud
1200 - 115,200
ADP 4100 Printer Installation and Operators Manual, April 2007
The Unit has two RS-232 Asynchronous Serial Communications ports
to interface to the Host system. The physical connection is provided
using two DB-25 female pin connectors marked COMM 1 and COMM
2. The ports are configured as DTE connections and can be used to
connect to an associated DTE host using a null modem cable. The
pinout below provides the basic cabling requirements to connect the
Unit to a PC-type host system (table shown assumes the host system
uses a DTE DB-9 connector).
Signal Flow
Signal Name
CD
RxD
TxD
DTR
Signal GND
DSR
RTS
CTS
RING
The connection from pin 11 to RTS enables the Unit to function with
existing customer cabling. This connection can be removed if
necessary.
The Unit may also have optional hardware interfaces including
Ethernet, USB, and Modem. Custom firmware interfaces can be
written for these and the existing serial interface.
The Unit uses an asynchronous serial data transmission method.
Data is sent based on any combination of the following:
Data Length
7, 8
XP (COMM 1 and 2)
Signal Name
N/A
⇐
TxD
⇒
RxD
⇒
DSR
N/A
Signal GND
⇐
DTR
⇒
CTS
⇐
RTS
⇒
Parity
None, Even, Odd, Mark,
Space
ADP 4100 Printer
Pin #, DB-25F
2
3
6
7
20
5
4,11
Stop Bit
1, 2
13
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