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2.2.3
Connecting a Data Terminal or a
Printer to the VPS
The pin configuration of the EIA (RS-232C) connector
is
as follows.
Pin
Number
Signal Name
1
FG
Frame Ground
Transmit-
AA
101
2
TXD
ted Data
BA
103
3
RXD
Received Data Request To
BB
104
4
RTS
Send
CA
105
5
6 I
I
CTS
cE;r~ To Send Data
Set 1 C$
/
DSR
Readv
:irl
7
SC
Signal Ground
Data Car-
AB
102
8
DCD
rier Detect
CF
109
20
DTR
Data Terminal Ready
CD
108.2
EIA (RS-232C)
SIGNALS:
Frame Ground (FG)
Connects to the unit frame and the earth ground conduc-
tor of the AC power cord.
Transmitted Data (TXD)
. . . . . . ...*.. . . . . . . . . . . . . . . . . . . . . . . . . . . (output)
Conveys signals from the unit to the printer. A "Mark"
condition is held unless data or BREAK
signals are being
transmitted.
Received Data (RXD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (input)
Conveys signals from the printer.
Request To Send (RTS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (output)
This lead is held ON whenever DSR is ON.
Clear To Send (CTS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (input)
An ON condition of circuit CTS indicates that the printer
is ready to receive data from the unit. The unit does not
attempt to transfer data or receive data when circuit CTS
is OFF.
Data Set Ready (DSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (input)
An ON condition of circuit DSR indicates the printer is
ready. Circuit DSR ON does not indicate that communica-
tion has been established with the printer.
Signal Ground (SG)
Connects to the DC ground of the unit for all interface
signals.
Manager's Guide
Configuration
& Installation
M-2- 19
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