Signal button insert, security technology, Busch-Infoline, signal button insert According to DIN0834 For triggering alarm messages, e.g. in a disabled toilet. With reassurance light and control display via LED. With RED pull cord, length 2.5 m. Actuation feedback (individual/group triggering) can be selected via internal jumper. An emergency power supply is required for installations according to DIN0834. Nominal frequency: 50 Hz Control/signal outputs: 1, normally open contact, potential-free, 30 V~/35 V-, 100 mA Protection class of device: SELV Temperature range of device: 5 °C to 40 °C