2 - 3 Wiring Precautions
2 - 3 Wiring Precautions
Before wiring, verify the label for correct model number and options. Switch off the power while checking.
Care must be taken to ensure that maximum voltage rating specified on the label are not exceeded.
It is recommended that power of these units to be protected by fuses or circuit breakers rated at the lowest
value possible.
All units should be installed inside a suitably grounded metal enclosure to prevent live parts being accessible
from human hands and metal tools.
All wiring must conform to appropriate standards of good practice and local codes and regulations. Wiring must
be suitable for voltage, current, and temperature rating of the system.
Beware not to over-tighten the terminal screws. The torque should not exceed 1 N-m ( 8.9 Lb-in or 10.2 KgF-cm )
Unused control terminals should not be used as jumper points as they may be internally connected, causing
damage to the unit.
Verify that the ratings of the output devices and the inputs as specified in Chapter 6 are not exceeded.
Except the thermocouple wiring, all wiring should use stranded copper conductor with maximum gauge 18 AWG.
Before wiring, verify the label for correct model number and options. Switch off the power while checking.
Care must be taken to ensure that maximum voltage rating specified on the label are not exceeded.
It is recommended that power of these units to be protected by fuses or circuit breakers rated at the lowest
value possible.
All units should be installed inside a suitably grounded metal enclosure to prevent live parts being accessible
from human hands and metal tools.
All wiring must conform to appropriate standards of good practice and local codes and regulations. Wiring must
be suitable for voltage, current, and temperature rating of the system.
Beware not to over-tighten the terminal screws. The torque should not exceed 1 N-m ( 8.9 Lb-in or 10.2 KgF-cm )
Unused control terminals should not be used as jumper points as they may be internally connected, causing
damage to the unit.
Verify that the ratings of the output devices and the inputs as specified in Chapter 6 are not exceeded.
Except the thermocouple wiring, all wiring should use stranded copper conductor with maximum gauge 18 AWG.
*
*
*
*
*
*
*
*
*
Figure 2.2
Lead Termination
Figure 2.2
Lead Termination
Figure 2.3
Rear Terminal Connection
Figure 2.3
Rear Terminal Connection
4.5 ~7.0 mm
0.18" ~0.27"
2.0mm
0.08" max.
+
+
_
_
RTD
A
+
+
COM
TC+
_
B
PTB
B
PTA
TXD
RXD
90-250 VAC
47-63 Hz,10VA
OP2
2A/240 VAC
2A/240 VAC
L
N
OP1
CAT. I I
1
8
9
10
11
12
13
14
2
3
4
5
7
6
I
V
V+,mA+
PTB
_
TC
V ,mA
_
_
TX1
TX2
RS-485
RS-232
_
50°C max. Air ambient
Use copper conductors
(except on T/C input )
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