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2 3 Wiring Precautions
2 3 Wiring Precautions
Before wiring, verify the label for correct model number and options. Switch
Before wiring, verify the label for correct model number and options. Switch
*
off the power while checking.
off the power while checking.
*
Care must be taken to ensure that maximum voltage rating specified on the
Care must be taken to ensure that maximum voltage rating specified on the
label are not exceeded.
label are not exceeded.
It is recommended that power of these units to be protected by fuses or circuit
It is recommended that power of these units to be protected by fuses or circuit
*
breakers rated at the minimum value possible.
breakers rated at the minimum value possible.
All units should be installed inside a suitably grounded metal enclosure to
All units should be installed inside a suitably grounded metal enclosure to
*
prevent live parts being accessible from human hands and metal tools.
prevent live parts being accessible from human hands and metal tools.
All wiring must conform to appropriate standards of good practice and local
All wiring must conform to appropriate standards of good practice and local
*
codes and regulations. Wiring must be suitable for voltage, current, and
codes and regulations. Wiring must be suitable for voltage, current, and
temperature rating of the system.
temperature rating of the system.
The " stripped " leads as specified in Figure 2.2 below are used for power and
The " stripped " leads as specified in Figure 2.2 below are used for power and
*
sensor connections.
sensor connections.
Beware not to over-tighten the terminal screws.
Beware not to over-tighten the terminal screws.
*
Unused control terminals should not be used as jumper points as they may
Unused control terminals should not be used as jumper points as they may
*
be internally connected, causing damage to the unit.
be internally connected, causing damage to the unit.
Verify that the ratings of the output devices and the inputs as specified in
Verify that the ratings of the output devices and the inputs as specified in
*
Chapter 8 are not exceeded.
Chapter 8 are not exceeded.
Electric power in industrial environments contains a certain amount of noise in
Electric power in industrial environments contains a certain amount of noise in
*
the form of transient voltage and spikes. This electrical noise can enter and
the form of transient voltage and spikes. This electrical noise can enter and
adversely affect the operation of microprocessor-based controls. For this
adversely affect the operation of microprocessor-based controls. For this
reason we strongly recommend the use of shielded thermocouple extension
reason we strongly recommend the use of shielded thermocouple extension
wire which connects the sensor to the controller. This wire is a twisted-pair
wire which connects the sensor to the controller. This wire is a twisted-pair
construction with foil wrap and drain wire. The drain wire is to be attached to
construction with foil wrap and drain wire. The drain wire is to be attached to
ground at one end only.
ground at one end only.
2.0mm
0.08" max.
22
~
4.5
7.0 mm
~
0.18"
0.27"
OUT2
OUT1
ALM2
_
1
2
3
4
5
L
N
90-264 VAC
2A/240 VAC
2A/240 VAC
47-63 Hz,15VA
V ,CT
EI ,TC
V+ ,CT+
AO+ AO
TC+
_
_
PTA
PTB
PTB
EI+,COM
TX1
8
9
10
11
12
_
RTD
B
B
A
_
V
_
V
CT
_
I
ALM1
_
6
7
TX2
13
14
_
ALM1
CAT. I I
CAT. I I
UM25001C
Figure 2.2 Lead Termination
Figure 2.2 Lead Termination
Figure 2.3 Rear Terminal
Figure 2.3 Rear Terminal
Connection Diagram
Connection Diagram
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