Owner`s manual

47
The service port has an RJ-45 modular connector. Most
serial computers and terminals do not have modular
connectors. Therefore, adapters are required to convert
from DB-25 or DE-9 connectors to modular connectors.
The service port uses the following communication
signals:
SERVICE PORT 8-PIN MODULAR EIA-232 PIN/SIGNAL DEFINITION
PIN SIGNA
L
DIRECTIO
N
DESCRIPTION
1 DTR Output Data Terminal Ready. Enable/disable receiving
characters
2 DCD Output Data Carrier Detect. +12 Volts when unit is powered
on.
3 RTS Output Request To Send. +12 Volts when unit is powered
on.
4 TX Output Transmit Data
5 RX Input Receive Data
6 DSR Input Data Set Ready. Not used as a handshake line.
7 GND ---- Signal Ground
8 CTS Input Clear To Send. Enable/disable transmitting
characters
An adapter is required to connect an IBM PC to the
service port. Figure 9 shows the required adapter for a
terminal having a DB-25 serial connector. Figure 10 on
the following page shows the required adapter for a PC
with a DE-9 connector.