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TERMINAL CONNECTIONS
Connect the unit as in the diagram below.
■ EXTERNAL DIMENSIONS unit: mm (inch)
■ CONNECTION DIAGRAM
RTD
1
A
INPUT 1
2
B
11
B
RTD
3
A
INPUT 2
4
B
13
B
RTD
6
A
INPUT 3
7
B
16
B
RTD
8
A
INPUT 4
9
B
18
B
*For dual redundant communication.
27.5 (1.08)
1
20–M3
11
2
SCREW
12
3
13
4
14
5
15
6
16
7
17
8
18
9
19
10
TERMINAL
20
COVER
INTERNAL BUS A
INTERNAL BUS B *
INTERNAL POWER
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
109 (4.29)
• Unused Input Channels
Close across the unused input terminals with a resistor as
shown below and set the DIP switch for Pt 100 input.
INPUT 1
INPUT 2
1
3
100Ω
2
4
11
13
Unused channels left open are equal to the burnout,
which turns the red ERR LED on and sets a burnout flag at
the PLC or the host device.
Connecting the resistor means approx. 0°C. An alarm
setpoint must be set to a value that does not trip an
unwanted alarm.
Unused channels can be specified and set so on the PC
Configurator Software (model: R3CON) without needing to
connect resistors at the field terminals.
R3-AR4
POSITIONING
GUIDE
INPUT 3
INPUT 4
6
8
7
9
16
18
EM-8433 Rev.3 P. 3 / 4
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