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Chapter 6. Physical installation
6-8
The RS-232C connector also uses the EIA 25- Pin connector. The
assignment for this port is as follows:
Pin
No.
1
2
3
4
5
6
7
8
9
iO
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Notes:
Signal
Mnemonic
Direction
Name
Protective Ground
FG
Transmit Data
TXD
In
Received Data
RXD
Out
Request to Send
RTS
In
Clear to Send
CTS
Out
Data Set Ready
DSR
Out
Signal Ground
SG
Data Carrier Detect
(1)
DCD
Out
(Not Used)
(Not Used)
Printer Status (2)
STD
In
(Not Used)
(Not Used)
(Not Used)
(Not Used)
(Not Used)
(Not Used)
(Not Used)
(Not Used)
Data Terminal Ready
(2)
DTR
In
(Not Used)
(Not Used)
(Not Used)
(Not Used)
(Not Used)
Used
Always set to on
X
(1 )
(2)
Used for the printer monitor.
RS-
232C
X
X
X
X
X
X
X
X
X
X
The EIA 25-pin connector looks like this.
t
~
Female tapped #4-40
·1
1 1
I
I-+-+--t·
-I I I
I-H-t-
I
-----47.04mm (1.85 in.)
---~.~I
(
(
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