Special features The GARDENA 24 V Connecting Cable can connect up to six GARDENA 24 V Irrigation Valves (Art. No. 1278-20) to the Comfort Irrigation Control System 4040 modular and Extension Module 2040 (Art. No. 1276-20 and 1277-20), and to the Classic Irrigation Control Systems 4030 and 6030 (Art. No. 1283-20 and 1284-20). The maximum cable length is 30 metres and the maximum voltage is 30 V. The GARDENA 24 V connecting cable is 15 metres long and has a cable cross-section of 7 x 0.5 mm².