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Conditions EIA SIGNALS:
The following combinations are disallowed.
Frame Ground (FG);
Connects to the unit frame and the earth ground
conductor 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.
stop bit length
If any of the above disallowed combinations are
selected, “INPUT ERROR” will be displayed.
Press the NEXT button and then repeat the
procedure of programming.
Clear To Send (CTS); . . . . . . . . . . . . . . . . . . (input)
An ON condition of circuit CTS indicates that the
printer is. ready to receive data frotn the unit.
A
The unit does not attempt to transfer data or receive
data when circuit CTS is OFF.
The pin conJguration of EZA (RS-232C) connector is
as follows.
Data Set Ready (DSR);
. . . . . . . . . . . . . . . . . . (input)
An ON condition of circuit DSR indicates the
Iprinter is ready.
‘Circuit DSR ON does not indicate that communica-
tion has been established with the printer.
101
103
104
105
106
107
1 FG Frame Ground AA
2
TXD Transmitted BA
Data
3
RXD Received Data BB
4 RTS Request To CA
Send
5 CTS
Clear To Send
CB
6
DSR Data Set Ready CC
.7 SG Signal Ground
A B
8
DCD Data Carrier CF
Detect
20
DTR Data Terminal CD
.’
Ready
Signal Ground (SG);
Connects to the DC ground of the unit for all
interface signal.
Data Terminal Ready (DTR) . _ . . . . . . . . . .
(output)
This signal line is turned ON by the unit to indicate
that it is ON LINE.
Circuit DTR ON does not indicate that communica-
tion has been established with the? printer.
It is switched OFF when the unit is OFF LINE.
102
109
108.2
Data Carrier Defect (DCD) . . . . . . . . . . . . . . . . (input)
The ON condition is an indication to data terminal
(DTE) that the carrier si@al is being received.