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HP Designjet Printers - Serial Cable Pin Outs

25 pin to 9 pin cable

Pin outs

Printer
PIN
PIN
Computer
Request to Send
4
---------
1
Received Line Signal Detect
Transmit Data
2
----------
2
Receive Data
Receive Data
3
----------
3
Transmit Data
Clear to Send
5
----------
4
Data Terminal Ready
Data Set Ready
6
----------
Signal Ground
7
----------
5
Signal Ground
Data Terminal Ready
20
----------
6
Data Set Ready
----------
8
Clear to Send
Data Carrier Detect
8
----------
7
Request To Send

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25 pin to 25 pin cable

Pin outs

Printer
PIN
PIN
Computer
Protective Ground
1
----------
1
Protective Ground
Transmit Data
2
----------
3
Receive Data
Receive Data
3
----------
2
Transmit Data
Signal Ground
7
----------
7
Signal Ground
Clear to Send
5
----------
20
Data Terminal Ready
Data Set Ready
6
----------
Data Terminal Ready
20
----------
5
Data Set Ready
----------
6
Clear to Send

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25 pin to 25 pin cable

Pin outs

Printer
PIN
PIN
Computer
Protective Ground
1
----------
1
Protective Ground
Transmit Data
2
----------
3
Receive Data
Receive Data
3
----------
2
Transmit Data
4
----------
8
Signal Ground
7
----------
7
Signal Ground
8
----------
4
12
----------
11
----------
19
11
----------
12
19
----------
Clear to Send
5
----------
20
Data Terminal Ready
Data Set Ready
6
----------
Data Terminal Ready
20
----------
5
Data Set Ready
----------
6
Clear to Send

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25 pin to 25 pin cable

Pin outs

Printer
PIN
PIN
Computer
Protective Ground
1
----------
1
Protective Ground
Transmit Data
2
----------
3
Receive Data
Receive Data
3
----------
2
Transmit Data
Signal Ground
7
----------
7
Signal Ground
Data Terminal Ready
20
----------
5
Clear to Send
----------
6
Data Set Ready

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