Setup Procedures iTherm
®
280 Programmer’s Guide
Page 42 Rev C 28-07764
Earth Ground
+24 Volt Supply
Ground (+24 V dc)
External Supply
If an external supply is used a 3 pin mini DIN plug is provided for the external 24 Volt supply.
Figure 4 3-pin mini DIN plug
Connecting Communications Cables
The iTherm
®
280 has a number of different communications interfaces.
Serial
The serial interface connector is either a 9-pin or 25-pin mail D shell interface. The pin-out is
shown below
9-pin 25-pin Signal Description
Pin 2 Pin 3 RX Receive Data
Pin 3 Pin 2 TX Transmit Data
Pin 4 Pin 20 DTR Data Terminal Ready
Pin 5 Pin 7 GND Signal Ground
Pin 6 Pin 6 DSR Data Set Ready
Pin 7 Pin 4 RTS Request to Send
Pin 8 Pin 5 CTS Clear to Send
Table 7 Serial interface pin out
Parallel
The parallel interface connection is very similar to the serial interface connection. It can be a
36-pin Centronics (IEEE 1284-B) or a 25-Pin female D-Shell (IEEE 1284-A) connector. The pin-
out of both connectors are shown below
25-pin
Connector
36-pin
Connector
Signal Description Direction
Pin 1 Pin 1 STROBE Clock data to printer Host to Printer
Pins 2-9 Pins 2-9 D0 - D7 Data Host to Printer
Pin 10 Pin 10 ACK\ Printer accepted data Printer to Host
Pin 11 Pin 11 BUSY Printer busy Printer to Host
Pin 12 Pin 12 PE Paper Out/Status Printer to Host
Pin 13 Pin 13 SLCT Printer selected Printer to Host
Pin 14 Pin 14 AUTOFD Auto-feed paper Host to Printer
Pin 15 Pin 32 FAULT\ Printer error Printer to Host
Pin 16 Pin 31 INIT\ Initialize printer Host to Printer
Pin 17 Pin 36 SLIN Select printer Host to Printer
Pin 17 FG Frame ground Printer to Host
- Pin 18 +5V Peripheral logic high Printer to Host
Pins 18-25 Pins 16, 19-30 GND Ground
Table 8 Parallel interface pin out
