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A470e Users Guide
Pertech® 2006
18
Printer Computer
DB-9M DB-9M
Pin Pin
1 N/C 1 N/C
2.RXD ← 3
3 TXD → 2
4 DTR → 6
5 SIG. GND. ← 5
6 DSR ← 4
(TTL FORM IN) →
7 RTS → 8
8 CTS ← 7
(TTL LOW PAPER) →
9. N/C N/C
The RS-232 interface uses either XON/XOFF(Software) or DTR/DSR(Hardware) protocol. This
is set in the Conguration Mode under the serial interface selections for Flow Control for XON/
XOFF, a particular character is sent back and forth between the host computer and the printer
to regulate the communication. For DTR/DSR, changes in the DTR/DSR signal coordinate the
information ow.
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The A470e printer serial interface has a DB9 Pin Male connector. The cable must be Null Mo-
dem Serial for standard PC communications compatibility. The Baud Rate and Parity and Flow
Control are selectable through Command Codes or via the Conguration Mode. The settings
for the port on the PC must be congured the same as the printer or communication will fail.
Flow Control
Serial Interface Pinout
DB9F to DB9F Serial
Interface Cable
Pertech Part Number
106356010
RS232 Serial Interface