16
IMPORTANT: Before you proceed with cabling, you must know
whether the devices that you will connect to Print Master are DTE
(Data Terminal Equipment) or DCE (Data Communication
Equipment). The following devices are generally DTE: terminals,
printers, and computers like the IBM PC. The following devices are
DCE: modems and some computers.
If your device transmits data on Pin 2 and receives data on Pin 3, it is
DTE. If your device receives data on Pin 2 and transmits data on Pin
3, it is DCE. However, to verify the interface requirements, please
refer to the Owner's Manual for your device.
Serial ports on Print Master have DB-25 female DCE connectors.
DCE ports use the following signals for communication:
DCE PORT PIN/SIGNAL DEFINITION
Pin
Signal
(EIA-232)
Direction
Description
1
PGND
---
Protective Ground
2
Tx
Input
Data In
3
Rx
Output
Data Out
4
RTS
Input
Request To Send (Not Used)
5
CTS
Output
Clear To Send: - Voltage When Print Buffer Full
6
DSR
Output
Data Set Ready: + Voltage When Print Master Powers Up
7
SGND
---
Signal Ground
8
DCD
Output
Data Carrier Detect: + Voltage When Print Master Powers Up
20
DTR
Input
Print Master Transmit Enabled When +12 Volts. Internally
Enabled If No Wire Connected.
Содержание PRINT MASTER 706A
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