-
5 -
(1) Wiring operation should be done according to the instruction for the terminal arrangement in section 2-6. Exercise care that no wrong
connection is made.
(2) Crimp terminal should accommodate the M3.5 screw and should have a width of less than 7mm.
(3) For thermocouple input, select the compensation wire suitable to the thermocouple type.
(4) For R.T.D.input, leads should be less than 5
Ω
in resistance and three leads should have the same resistance.
(5) Input signal line should be conducted safety apart from the high voltage power line.
(6) Shield wiring (single point grounding) is effective for static induction noise.
(7) Short interval twisted pair wire for input signal is effective for electromagnetic induction noise.
(8) When wiring, use wire (1mm
2
minimum in sectional area) of 600V Grade Polyvinyl Chloride insulated Wire or equivalent wire which has
the same ratings.
(9) Earth grounding should be performed with earth resistance less than 100
Ω
and with wire thicker than 2mm
2
.
(10) Noise filter
In case where the instruments are affected by the power supply noise, use a noise filter for preventing malfunction.
Noise filter should be mounted on the grounded panel, the shorted wire should be used to connect between the noise filter output and the
power line terminal.
2-6. Terminal arrangement
SR71
SR73
SR72
SR74
2-7. Terminal arrangement table
NOTE: For SR71, input terminal of heater break and set value bias is common. Start operation after checking the additional function.
For Thermocouple, Voltage, and Current input, measurement error results by connection between B and B terminal.
Recommendable noise filter: TDK ZMB2203-13
Name of terminal and description
Power terminal 100-240V AC±10% 50/60Hz 11VA
Protective conductor terminal (
)
Input terminal R.T.D.A,Thermocouple,Voltage,
Input terminal R.T.D.B,Thermocouple,Voltage, Current–
R.T.D.B
Output terminal Contact COM,SSR Drive voltage,Voltage,
Contact NO, SSR Drive voltage,Voltage, Current–
Contact NC
Alarm output (option) terminal
COM Contact rating 240V AC 1.5A (resistive load)
AH Higher limit alarm
AL/HB Lower limit alarm or heater break alarm
Heater break alarm (option) CT input terminal
Set value bias (option) input terminal
Terminal number
SR71
11 - 12
1
2
3
5
6
7
8
9
10
13 - 14
13 - 14
SR72
8 - 9
10
4
5
7
11
12
13
17
18
19
15 - 16
1 - 2
SR73 • 74
11 - 12
13
7
8
10
14
15
16
18
19
20
5 - 6
3 - 4
Grounding
Grounding
100-
~
240V AC
Noise filter
IN OUT
Controller
100-240V AC
50 / 60Hz
~
The shorted wire should be used here.
IN PUT
RTD
TC • mV
V • mA
+A
-B
B
Power
1
6
7
8
9
10
2
3
4
5
1
2
3
4
5
6
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
15
16
17
18
19
20
21
8
9
10
11
12
13
14
N
L
C OM+
NO -
C OM
AH
AL/HB
CONTROL
OUTPUT
C OM+
NO -
NC
CONTROL
OUTPUT
ALARM
OUTPUT
CT
or
SB
11
12
13
14
L
N
~
Power
~
SB
CT
COM
AH
AL/
HB
IN PUT
RTD
TC • mV
V • mA
+A
-B
B
C OM+
NO -
NC
CONTROL
OUTPUT
L
N
Power
~
C OM
AH
AL/HB
ALARM
OUTPUT
SB
CT
IN PUT
RTD
TC • mV
V • mA
+A
-B
B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
C OM+
NO -
NC
CONTROL
OUTPUT
L
N
Power
~
C OM
AH
AL/HB
ALARM
OUTPUT
SB
CT
IN PUT
RTD
TC • mV
V • mA
+A
-B
B
2-5. Wiring
•
Always disconnect this product from any power source during wiring operation to prevent electrical shock.
•
Be certain that the protective conductor terminal (
) is properly grounded. Otherwise, a serious electric shock may result.
•
Avoid touching the wired terminal and charged devices while supplying power.
WARNING
