RS-232 Pinout
RS-422/485 Pinout
www.quatech.com
March, 2003
Made in USA
Pin 1
Chassis Ground
Pin 2
Transmit Data
Pin 3
Receive Data
Pin 4
Request to Send
Pin 5
Clear to Send
Pin 6
Data Set Ready
Pin 7
Signal Ground
Pin 8
Carrier Detect
Pin 11
Receive Clock Out
Pin 15
Transmit Clock In
Pin 17
Receive Clock In
Pin 18
Local Loopback
Pin 20
Data Terminal Ready
Pin 21
Remote Loopback
Pin 24
Transmit Clock Out
Pin 25
Test Mode
Pin 1
Chassis Ground
Pin 2
Transmit Data+
Pin 3
Receive Data+
Pin 4
Request to Send+
Pin 5
Clear to Send+
Pin 6
Data Set Ready+
Pin 7
Signal Ground
Pin 8
Carrier
Pin 9
Receive Clock In-
Pin 10
Carrier Detect-
Pin 11
Transmit Clock Out-
Pin 12
Transmit Clock In-
Pin 13
Clear to Send-
Pin 14
Transmit Data-
Pin 15
Transmit Clock In+
Pin 16
Receive Data-
Pin 17
Receive Clock In+
Pin 18
Chassis Ground
Pin 19
Request to Send-
Pin 20
Data Terminal Ready+
Pin 21
Sync In (RS-422 only)
Pin 22
Data Set Ready-
Pin 24
Transmit Clock Out+
Pin 25
Chassis Ground
