%
8
%.
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 5 3-pin mini DIN plug
%
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 10 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 11 Parallel interface pin out
Содержание ITHERM 280
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