Rs-232C Signal Definitions - HP 16500A Service Manual

Pin No.
1
Protective Ground
2
Transmitted Data (TD)
3
Received Data (RD)
4
Request to Send (RTS)
5
Clear to Send (CTS)
6
Data Set Ready (DSR)
7
Signal Ground (SGND)
8
Data Carrier Detect (DCD)
20
Data Terminal Ready (DTR)
23
Data Signal Rate Selector
Table 2-2. RS-232C Signal Definitions
Function
HP 16500A/16501A - Installation
RS-232C
Standard Signal Direction and Level
AA
Not applicable
BA
Data from Mainframe
High = Space = "0" = +12V
Low = Mark = "1"= -12V
BB
Data to Mainframe
High = Space = "0" = +3V to +25V
Low = Mark = "1" = -3V to -25V
CA
Signal from Mainframe
High = ON = +12V
Low = OFF = -12V
CB
Signal to Mainframe
High = ON = +3V to +12V
Low = OFF = -3V to -25V
CC
Signal to Mainframe
High = ON = +3V to +25V
Low = OFF = -3V to -25V
AB
Not applicable
CF
Signal to Mainframe
High = ON = +3V to +25V
Low = OFF = -3V to -25V
CD
Signal from Mainframe
High = ON = +12V
Low = OFF = -12V
CH/CI
Signal from Mainframe
Always High = ON = +12V
2-9