Datasheet ALDP105 (Panasonic) - 7

GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE ■ For cautions for use, please read " GUIDELINES FOR RELAY USAGE ". https://industry.panasonic.com/global/en/products/control/relay/cautions_use Precautions for Coil Input ■ Long term current carrying ■ Coil connection A circuit that will be carrying a current continuously for When connecting coils of polarized relays, please check coil long periods without relay switching operation. ( circuits polarity ( ＋, − ) at the internal connection diagram for emergency lamps, alarm devices and error inspection ( Schematic ). If any wrong connection is made, it may that, for example, revert only during malfunction and cause unexpected malfunction, like abnormal heat, fire and output warnings with form B contacts ) Continuous, long- so on, and circuit do not work. Avoid impressing voltages to term current to the coil will facilitate deterioration of coil the set coil and reset coil at the same time. insulation and characteristics due to heating of the coil itself. For circuits such as these, please use a magnetic-hold type ■ Maximum allowable voltage and temperature latching relay. If you need to use a single stable relay, use rise a sealed type relay that is not easily affected by ambient Proper usage requires that the rated coil voltage be conditions and make a failsafe circuit design that considers impressed on the coil. Note, however, that if a voltage the possibility of contact failure or disconnection. greater than or equal to the maximum continuous voltage is impressed on the coil, the coil may burn or its layers short ■ DC Coil operating power due to the temperature rise. Furthermore, do not exceed the Steady state DC current should be applied to the coil. The usable ambient temperature range listed in the catalog. wave form should be rectangular. If it includes ripple, the ripple factor should be less than 5 %. ● Operate voltage change due to coil temperature rise However, please check with the actual circuit since the In DC relays, after continuous passage of current in electrical characteristics may vary. The rated coil voltage the coil, if the current is turned OFF, then immediately should be applied to the coil and the set/reset pulse time of turned ON again, due to the temperature rise in the latching type relay differs for each relays, please refer to the coil, the operate voltage will become somewhat relay's individual specifications. higher. Also, it will be the same as using it in a higher temperature atmosphere. The resistance/temperature relationship for copper wire is about 0.4 % for 1 ℃, and with this ratio the coil resistance increases. That is, in order to operate of the relay, it is necessary that the voltage be higher than the operate voltage and the operate voltage rises in accordance with the increase in the resistance value. However, for some polarized relays, this rate of change is considerably smaller. Panasonic Industry Co., Ltd. Electromechanical Control Business Division industry.panasonic.com Panasonic Industry Co., Ltd. 2024 ASCTB412E 202408 ー 6 ー