Energy meter UMG 96RM-M with M-Bus, (UL) supply voltage 24V..90V (50/60Hz), 24V..90V DC, 150V CATIII voltage measurement, measurement category 300V CATIII, 3 voltage measurement inputs (LN: 20V-300V, LL: 34V- 520V, 45Hz-65Hz), 3 current measurement inputs 0..5A, response current 5mA, measurement in three-phase 4-wire systems with earthed neutral conductor up to max. 277V / 480V, measurement in unearthed three-phase 3-wire systems up to max. 480V, measurement in single-phase 3-wire systems up to max. 220V-440V, measurement in single-phase 2-wire systems up to max. 220V, 2 digital / pulse outputs interface: M-Bus accessories (included):33.03.218 Installation instructions, safety instructions and 'Software-GridVis' quick start guide29.01.036 Mounting brackets (already pre-mounted on the device)Programming software 'GridVis Basic' download: www.janitza.de/gridvis-download.html