SDV-DM7 AC200/220 Omron, SDV-DM7 AC200/220 Datasheet - Page 60

• Manufacturer Part Number: SDV-DM7 AC200/220
• Description: Sensor Hardware & Accessories VOLTAGE SENSOR
• Manufacturer: Omron

Specifications of SDV-DM7 AC200/220

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

K2CU-F Series
When power is supplied to the heater (when the contactor is ON), a
current flows through the wires to the heater elements. At the same
time, a voltage is imposed on the power circuit of the K2CU-F.
The current flowing to the heater wires is detected by the detector
sections through each Current Transformer (CT) incorporated by the
K2CU-F.
The current signals transmitted by the two CTs are sent to the cur-
rent-voltage converters, smoothing circuits, and comparators as
shown in the diagram.
K2CU-P Series
The K2CU-P operates basically in the same way as the K2CU-F.
The comparator compares external current signals and the reference
value and outputs the result of the comparison to the output circuit.
58
Heater elements
Power supply
Heater elements
Power supply
CT
2
CT
Heater Element Burnout Detector
1
Note: The dotted lines indicate the line conductors passing through the windows of the current transformers.
1
2
Contactor
Contactor
CT
Note: The heater and the operating power supply
connected via terminals 6 and 8 or terminals 7
and 8 must be turned ON at the same time.
To each circuit
To each circuit
Alarm indicator
Output relay
K2CU
200/220 V 100/110 V
X
Alarm indicator
Output relay
6
S
1
X/c
X
X/c
7
S
2
CM
b
a
5
4
3
8
1
1
The signal generated by the reference voltage generator is sent to
the setting circuit to provide a reference value. The reference value
is sent to the comparators. Each comparator compares its heater
element current input and the reference value. If the input is lower
than the reference value, a signal is sent to the output circuit.
There are two detector sections operating independently. If either of
the input signals from the CTs is lower than the reference value, the
output relay and alarm indicator will be activated.
The K2CU-F incorporates a voltage fluctuation compensation func-
tion which automatically corrects the reference value if the supply
voltage fluctuates.
0 V
1
Buzzer
BZ
BZ
Buzzer