E2
MOUNTING
Location
Install the controller in a location that meets the following criteria:
•
Common mode voltages of I/O except power supply and relay con-
tact output: The voltage to ground is 30 Vr.m.s. max., 42.4 V peak
max., and 60 V DC max.
•
Neither high nor low temperature/humidity.
•
Free from silicone gas and other corrosive gases such as sulfide gas.
•
Little dust or soot.
•
Protected from direct sunlight, wind or rain.
•
Little mechanical vibration and shock.
•
Not close to a high voltage line, welding machine or other source of
electrical noise.
•
At least 15 meters away from a high voltage ignition device for a boiler.
•
No strong magnetic field.
•
No flammable liquid or gas.
•
Indoors
Mounting Procedure
•
The mounting must be horizontal within 10 degrees tilted in back side
lowering or within 10 degrees tilted in back side rising.
•
The mounting panel should be used with a thickness of less than 9 mm
of firm board.
External Dimensions
z
C25
unit: mm
para
enter
display
mode
pv
out
sp
5
65
96
108
48
ot2
ot1
ev3
ev2
ev1
man
SDC25
Mounting bracket
(Accessory)
Terminal
screw M3
z
C26
mode
display
enter
para
man
ev1
ev2
ev3
ot1
ot2
sp
out
pv
Mounting bracket
(Accessory)
Terminal screw M3
SDC26
65
5
108
96
96
Handling Precautions
•
To fasten this controller onto the panel, tighten a mounting
bracket screws, and turn one more half turn when there is no
play between the bracket and panel. Excessively tightening
the screws may deform the controller case.
•
Be sure to mount the unit in a panel so that operators do not
touch the rear terminal block.
Panel Cutout Dimensions
z
C25
unit: mm
Individual mounting
30 min.
92
44
30
min.
+0.5
0
+0.5 0
Gang-mounting
(48×N−4)
92
+0.5
0
+0.5 0
z
C26
Gang-mounting
(96×N−4)
+0.5
0
92
+0.5 0
Individual mounting
30 min.
92
30
min.
92
+0.5
0
+0.5 0
Handling Precautions
•
When three or more units are gang-mounted horizontally, the
maximum allowable ambient temperature is 40 °C.
WIRING
All wiring should follow local regulations and be carried out by certified and
experienced personnel. Be sure to provide a switch within operator reach for
shutting OFF the main power supply to the controller in the main supply wir-
ing. Also, in case of AC power supply models, the main supply wiring also re-
quires a time-lagged type (T) fuse (rated current: 0.5 A, rated voltage: 250 V).
(IEC127) The following table
shows the meaning of the sym-
bols in the terminal wiring label
on the controller side:
Handling Precautions
•
Before wiring the SDC25/26, verify the controller’s model No. and
terminal Nos. written on the label on the side of the body. Inspect all
wiring once wiring work for the SCD25/26 has been completed.
•
Use M3 crimp-type terminal lugs for wiring to terminal.
•
Leave at least 50 cm between I/O signal wires and power wires. Do
not put them in the same electrical conduit or duct.
•
Be careful not to allow any crimp-type terminal lugs to touch adja-
cent terminals.
•
To connect 2 (max.) crimp terminals to the same terminal screw,
bend the crimp terminals beforehand.
•
When the power to this controller is turned off, the current input
circuit is cut off. If multiple current-input type SDCs are connected in
series and you want to turn them on/off individually, convert them
to voltage input by adding resistors (No. 81401325, sold separately)
to the circuit.
•
Prepare a heater current conductor to send a heater current through
the current transformer. Do not use a heater current that exceeds the
specified permissible current as this may damage the controller.
•
The current transformer input cannot be used for phase control.
•
There is no isolation provided between control output 1 and control
output 2. Install an isolator as required.
•
Do not connect a terminating resistor to either end of the RS-485
communications line. Doing so may interfere with communication.
•
Make sure that devices and equipment connected to this device
have reinforced insulation suitable for the maximum operating volt-
age of this device’s power supply and input/output ports.
•
The controller requires maximum 5 seconds to start up once the
power is turned ON. The controller can be used once it has started
up. However, it is recommended to allow a warm-up time of at least
30 minutes to attain the specified accuracy.
z
Connection of C25/26
7
8
9
CT1
CT2
13
14
15
2
1
2
1
16
17
+
−
1
2
1
2
Digital input
RS-485
22
23
24
DA
DB
SG
18
19
20
21
3
4
5
6
3
4
5
6
2
1
2
3
1
COM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
10
11
12
10
11
12
10
11
12
+
−
+
+
−
mA
V
C
B
A
13
14
13
14
15
13
14
13
14
15
+
−
+
+
−
+
−
+
+
−
COM
3
2
1
4
Inputs
Power supply
AC power supply
100 to 240 V AC
DC power supply
24 V AC/24 V DC
(non polar)
DI
Auxiliary output
Communication
Current
Relay
Control outputs
Event outputs
Relay
Relay
(independent
contact)
Current
Transformer
inputs
DC current
DC voltage
PV inputs
Thermocouple
RTD
Voltage pulse
Voltage pulse
Voltage pulse
Current
Current
Current
Symbols
Meaning
AC power supply
DC power supply
Caution, there is danger of electric shock
Caution
