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3--1
Interface Specifications
3--1--1
RS-232C
Communications Signals
Connection Diagram
This interface is for the E5AF only. Electrical characteristics conform to EIA
RS-232C.
13
25
Signal
Frame ground (safety ground)
Signal ground or common return
Send data
Receive data
Request to send
Clear to send
Data set ready
Data terminal ready
The following diagram shows how the E5AF is connected to the host comput-
er using the RS-232C.
Host computer
RS-232C
Abbrevi-
Pin
ation
no.
FG
1
SG
7
SD
2
RD
3
RS
4
CS
5
DR
6
ER
20
Shielded cable
1
14
Abbreviation
Signal
direction
FG
------
SG
------
SD
Output
RD
Input
RS
Output
CS
Input
DR
Input
ER
Output
E5AF
RS-232C
Pin
Abbrevi-
LT1081CN or equivalent
no.
ation
1
FG
7
SG
2
SD
3
RD
4
RS
5
CS
6
DR
20
ER
If the terminals are connected as shown by the
dotted lines in the figure, which is not absolutely
necessary, the cable can be used regardless of
the direction.
Section 3--1
Pin no.
1
7
2
3
4
5
6
20
TX
RX
+V
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