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
DCE PORT PIN/SIGNAL DEFINITION
Pin | Signal | 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. |
|
|
|
|
16
