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Question
What should I be aware of when operating MY4 General-purpose Relays AC100V Relay from a distance?
Answer
The distance depends on the type and installation conditions of the cable. Wiring power supplies over a long distance in parallel with power lines may cause reset failure due to voltage generated at both sides of the Relays from float capacitance in the wires when the coil input power supplies are OFF. If reset failure occurs, connect bleeder resistors to both sides of the coil.
Reference Information
Guideline for Cable Length Limits
| Type | Relay coil | |
| AC Relays | ||
| Preconditions | Must-operate voltage of up to 90% of rated voltage allowed | |
| Calculation of cable length | Symbols |  |
| Formulas |  (Formula is applicable up to a cable length of 3 km.) | |
| Example: For MY4 Relays | 100 VAC, 60 Hz, MY4 with CW Cable Answer: Value exceeds 3,000 m so there is no problem with cables up to 3 km. | |
Other General Purpose Relays FAQ
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Could the Relays become detached from the Sockets if I don't have Hold-down Clips to prevent them from becoming loose?
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What is the life span of the coils when voltage is continuously applied to coils for MY2 AC100V General-purpose Relays?
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Are there restrictions on the direction that the MY General-purpose Relays can be mounted?
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