DIVEX MHE-02, Installation, Operating And Maintenance Manual

Page: 70 / 119

IMCB34-E1
3
3. WIRING
3.1 Wiring Cautions
For thermocouple input, use the appropriate compensation wire.
For RTD input, use low resistance lead wire with no difference in resistance between the three lead wires.
To avoid noise induction, keep input signal wire away from instrument power line, load lines and power lines of other electric equipment.
For the current input specification, an external resistor (250 0.02 %, 0.25 W or more, 10 ppm/ C) must be connected between the input
terminals. For external resistor (shunt resistor), use the KD100-55: sold separately (RKC product). If this resistor is installed, close horizontal
mounting is not possible.
Signal connected to Voltage input and Current input shall be low voltage defined as “SELV” circuit per IEC 60950-1.
If there is electrical noise in the vicinity of the instrument that could affect operation, use a noise filter.
- Shorten the distance between the twisted power supply wire pitches
to achieve the most effective noise reduction.
- Always install the noise filter on a grounded panel. Minimize the wiring
distance between the noise filter output and the instrument power
supply terminals to achieve the most effective noise reduction.
- Do not connect fuses or switches to the noise filter output wiring as
this will reduce the effectiveness of the noise filter.
Allow approximately 4 seconds for contact output when the instrument is turned on. Use a delay relay when the output line is used for an
external interlock circuit.
Power supply wiring must be twisted and have a low voltage drop.
This instrument with 24 V power supply is not provided with an overcurrent protection device.
For safety install an overcurrent protection device (such as fuse) with adequate breaking capacity close to the instrument.
- Fuse type: Time-lag fuse (Approved fuse according IEC60127-2 and/or UL248-14)
- Fuse rating: Rated current: 0.5 A
For an instrument with 24 V power supply input, supply power from "SELV" circuit defined as IEC 60950-1.
A suitable power supply should be considered in end-use equipment. The power supply must be in compliance with a limited-energy circuits
(maximum available current of 8 A).
Use the solderless terminal appropriate to the screw size.
- Screw size: M3 x 6
- Recommended tightening torque: 0.4 N m [4 kgf cm]
- Specified solderless terminals: With isolation
- Applicable wire: Solid/twisted wire of 0.25 to 1.65 mm
2
Make sure that during field wiring parts of conductors can not come into contact with adjacent conductive parts.
3.2 Terminal Configuration
Alarm output Power supply
Control output
Input
Communication
NO: Normally open
NC: Normally closed
7
8
9
10
11
12
13
14
15
16
17
18 1
2
3
4
5
6
100 to 240V
AC
24V
DC
24V
AC
2 2
1 1
2
1
L
N
L
N
13
14
15
T/R(A)
T/R(B)
SG
RS-485
(Optional)
CT input
Current
transformer input
18
17
CT1
TC
TC input
11
12
A
B
B
RTD
10
RTD input
11
12
IN
Voltage input
0 to 5 V DC
1 to 5 V DC
11
12
11
12
Current input
0 to 20 mA DC
4 to 20 mA DC
W, A action types
Relay contact Voltage pulse
Current
Triac
NO
OUT2
NO
OUT1
3
4
5
6
OUT2
OUT1
3
4
5
6
OUT2
3
4
Triac out
5
6
OUT1
Triac out
Relay contact Voltage pulse
Current Triac
Trigger
F, D action types
NC
NO
OUT1
4
5
6
OUT1
6
5
Triac out
OUT1
5
4
OUT1
T2
T1
G
4
6
5
CB100
* Cautions for Communication terminal wiring :
Make sure that lugs or unshielded cables of the communication terminals are not touched to the screw heads, lugs, or unshielded
cables of the power supply terminals to prevent electric shock or instrument failure. Use additional care when two lugs are
screwed to one communication terminal.
It is recommended that the host computer communication line be isolated from the power supply and earth.
!
External
resistor
(Optional)
(Optional)
Alarm 1
Alarm 2
NO
ALM1
ALM2
7
8
9
NO
Power supply
Control output
NO: Normally open
NC: Normally closed
100 to 240V
AC
24V
DC
24V
AC
2 2
1 1
2
1
L
N
L
N
Communication
13
14
15
T/R(A)
T/R(B)
SG
RS-485
Alarm output
Input
TC
TC input
11
12
A
B
B
RTD
10
RTD input
11
12
IN
Voltage input
0 to 5 V DC
1 to 5 V DC
11
12
11
12
Current input
0 to 20 mA DC
4 to 20 mA DC
W, A action types
Relay contact Voltage pulse
Current
Triac
NO
OUT2
NO
OUT1
3
4
5
6
OUT2
OUT1
3
4
5
6
OUT2
3
4
Triac out
5
6
OUT1
Triac out
Relay contact Voltage pulse
Current
Triac
Trigger
F, D action types
NC
NO
OUT1
4
5
6
OUT1
6
5
Triac out
OUT1
5
4
OUT1
T2
T1
G
4
6
5
CB400
The terminal arrangement of CB500 is as shown in
the following diagram, but the terminal configuration
of CB500 is the same as that of CB400.
1
2
3
4
5
6
7
8
10
11
9
12
13
14
15
16
17
18
19
20
22
23
21
24
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
CT input
Current
transformer input
24
23
CT1
External
resistor
(Optional)
(Optional)
(Optional)
Alarm 1
Alarm 2
NO
ALM1
ALM2
7
8
9
NO
OUT
Minimize
distance
Instrument
power
terminals
IN
Twist these leadwires
Shorten distance between
pitches
Instrument power
Noise filter
3.2 MIN
5.5 MAX
4 mm