Chapter 3 Specifications #1 : UP and ZP must connect the auxiliary power 24VDC (-15%~20%). 3_ 3-7 Item Content Resistance: 0.5A/1point （2A/ZP） Inductance: 13W（24VDC） Max. loading Bulb: 2.5W（24VDC） The shielded cable: 500m Max. cable length The unshielded cable: 300m