Crack-IT WK 971 AP outdoor alarm clock
Additional electromechanical signaling device for telephone operation. Very loud signaling due to the electromechanical system. WK 978 is the name of the identical device from German Telekom
Availability: In stock
["Additional electromechanical signaling device for telephone operation. Very loud signaling due to the electromechanical system. WK 978 is the name of the identical device from German Telekom", "reverse polarity protected (attention, please only use terminals 1 and 2) WK 971 pebble gray RAL 7032 1-509.15.1.07 A 103 641 C On small telephone systems that do not provide enough energy, it may be necessary to use the following items: WK 971 (230V) with high-power switching relay 1-509.15.1.11 Operating voltage WK971 (standard) AC voltage 45?50 V/ 23?54 Hz; Impedance > 8 kOhm at 25 Hz of the operating voltage Volume (measured in a small reverb room) WK 971 > 105 dB (A)"]
Specifications
| Feature 1 | Additional electromechanical signaling device for telephone operation. Very loud signaling due to the electromechanical system. WK 978 is the name of the identical device from German Telekom |
| Feature 2 | reverse polarity protection (attention, please only use terminals 1 and 2) WK 971 pebble gray RAL 7032 1-509.15.1.07 A 103 641 C On small telephone systems that do not provide enough energy, it may be necessary to use the following items: WK 971 (230V) with high-voltage switch |
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