3-13
Chapter 3. Wiring
Handling Precautions
•
Do not connect or disconnect any load while the power of this device is on.
Failure of this device or the load may result.
•
The CT, VT, and current outputs inside the same block are not isolated.
•
The CT/VT common is a common terminal. Connect this terminal to an
external terminal, or use a ferrule without an insulation sleeve.
•
Do not apply a voltage/current exceeding the allowable maximum input
stated in the specifications to the CT/VT terminal. Doing so will cause device
failure.
•
When the current transformer input is used for phase angle control, the input
accuracy of the product may not be satisfied.
•
The voltage across terminals of the current output section of this device may
vary depending on the load and output value. The voltage is approx. 5 V in the
open state, but this is normal operation.
•
If a current transformer is used for a UL-compliant model, the transformer
must be compliant with UL 2808 (categories XOBA and XOBA7). Do not use an
uncertified current transformer.
z
Voltage pulse output block (voltage pulse outputs and 2 CT inputs)
1: CT1 input
2: CT common
3: CT2 input
4: Voltage pulse
5: Voltage pulse output −
Maximum allowable input
CT: 90 mA and 130 mA peak (AC),
1 V and 1.4 V peak (AC)
Transient overvoltage
CT: Supply v 250 V
Load current
Voltage pulse output: 25 mA max.
Handling Precautions
•
Do not connect or disconnect any load while the power of this device is on. A
failure of this device or the load may result.
•
The CT1, CT2, and voltage pulse outputs inside the same block are not
isolated.
•
The CT1 and CT2 common are common terminals. Connect this terminal to an
external terminal, or use a ferrule without an insulation sleeve.
•
Do not apply a current exceeding the allowable maximum input stated in the
specifications to the CT1/CT2 terminal. Doing so will cause device failure.
CT
CT
V
