R7HL-PA4E
EM-7812-AM Rev.1 P. 4 / 5
■
CONNECTION DIAGRAM
24V DC
SHIELD
TXD
+ (
TRD
+)
TXD
– (
TRD
–)
RXD
+ (
NC)
RXD
– (
NC)
0V
24V DC
0V
Note:
Terminal numbers in parentheses are for half-duplex
communication model.
IN0
GND
NC
+
24V
IN1
GND
NC
+
24V
IN2
GND
NC
+
24V
IN3
GND
NC
+
24V
GND
GND
+
24V
+
24V
1
2
4
3
1
2
4
3
1
2
4
3
1
2
4
3
1
2
4
3
INPUT
CH0
INPUT
CH1
INPUT
CH2
INPUT
CH3
SENSOR
EXCITATION
1
5
2
4
3
1
2
4
3
NETWORK
POWER
SUPPLY
Xn
GND
NC
+24V
1
2
4
3
■
Input Connection Examples
IN1
GND
NC
+
24V
IN2
GND
NC
+
24V
IN3
GND
NC
+
24V
IN4
GND
NC
+
24V
GND
GND
+
24V
+
24V
NPN output 3-wire sensor
NPN output 3-wire sensor
1
2
4
3
1
2
4
3
1
2
4
3
1
2
4
3
1
2
4
3
Sensor
circuit
Sensor
circuit
•
•
•
•
•
■
2-Wire Sensor
Detecting Circuit
COMMUNICATION CABLE CONNECTIONS
Master Module
RXD+
RXD–
TXD+
TXD–
FG
(SHIELD)
Slave Module
RXD+
RXD–
TXD+
TXD–
FG
(SHIELD)
Slave Module
TXD+
Terminating
Resistor
TXD–
RXD+
RXD–
SHIELD
Terminating
Resistor
Master Module
TR+
TR–
FG
(SHIELD)
Slave Module
TR+
TR–
FG
(SHIELD)
Slave Module
TR+
TR–
SHIELD
Note: Be sure to turn ON the switch of the terminating resistor located at both ends of the modules.
Terminating
Resistor
Terminating
Resistor
■
MASTER CONNECTION
• Full-duplex communication
• Half-duplex communication
056 222 38 18
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AG
