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4--1
Communications Connectors
4--1--1
Connection of E5AF-A20 and PC
Input circuit
4.7 k
Output circuit
Operation
Terminals
Input/output signal name
Input
DSL1 to DSL6
WD1 to WD4
VAL
Output
RD1 to RD4
BUSY
The E5AF Fuzzy Temperature Controller with BCD communications can be
directly connected to a PC (Programmable Controller) or a personal comput-
er.
E5AF-A20
1
DSL1
2
DSL2
3
External
DSL3
power
4
DSL4
supply
5
DSL5
+24 V
6
DSL6
8
WD1
9
WD2
10
WD3
11
WD4
12
VAL
14
RD1
15
RD2
16
RD3
17
RD4
18
BUSY
GND
23, 24
24 DC
13, 25
GND
Note The communications specifications of the E5AF-A20 and those of the
E5AX-A20 are identical.
Communications are possible as long as the VAL signal from the SYSMAC
PC is ON (low).
When a data select code (DSL1 to DSL6) is input from the PC to the
E5AF-A20, the E5AF-A20 either reads data from lines WD1 through WD4 or
writes data to lines RD1 through RD4 according to the data select code.
Note 1. Use the communications connector on the back of the E5AF to connect
the PC and the E5AF-20.
2. To communicate between one PC and several E5AF-A20 Models, use a
wired OR to connect each signal terminal other than the VAL terminal,
and select the Controller to communicate with using independent VAL sig-
nal lines.
Voltage
24 VDC
24 VDC
PC (SYSMAC)
OUT
OUT
COM
0 V
IN
COM
+V (24 VDC)
COM (0 V)
COM (24 VDC)
: IN
+24 V
0 V
Current
5.1 mA
5 to 15 mA
Section 4--1
Output Unit
(Transistor output)
Input Unit
(24 VDC input)
OUT
Impedance
Remarks
4.7 k
------
------
Open collector
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