2 separate monostable relays with each 2 double-pole double-throw. The relays have no limit switch, nevertheless they can be driven with steady current. The control takes place by negative switch impulses resp. steady current, AC voltage or digital current. Due to internal electronics the relay is noiseless even by connection to digital circuits or pulsed signals. It is suitable to connect light signals to modules which otherwise only control colour light signals, e. g. items 5204, 5208 and 5214. The relay is particularly suitable for track current control by the double-multiplexer item 52292. Power input approx. 2 x 14 mA by 16 V. Contact rating max.: 2 A each changeover contact.