PILZ-837300 Pilz Voltage Relays

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Pilz PILZ-837300 is a protection unit designed for 3-phase voltage monitoring, including overvoltage and undervoltage monitoring functions. It is suitable for DIN rail mounting and operates within an ambient air temperature range of -15 to +55°C. The unit has a net height of 87 mm and supports safety output contacts ratings from 0.1A to 5A at 24Vdc (DC-1; 120W) and 1.5A at 24Vdc (DC-13). Connection is facilitated through fixed screw terminal connections. As part of the S3UM sub-range, this unit measures 22.5mm in width, offers an IP40 degree of protection, and requires a supply voltage of 20.4-26.4Vdc (24Vdc nominal). It operates across a frequency measuring range of 40-400Hz and is housed in PPO material. Designed for a 3-phase (3AC) input network, it measures rated voltages of 208/400/480Vac and has a net width of 22.5 mm. Power consumption is rated at 1.5 W, with a net depth of 122 mm. Operating modes include fault latching/non-latching and normally energized/de-energized modes. Storage temperature tolerance ranges from -40 to +85°C. It features 1 x delayed auxiliary output (SPDT-NO/NC contacts; 0.1-5A 24Vdc DC-1 resistive load; 0.5-10s time-delay selectable), 1 x analog input for L1-L3 voltage measurement, and protection functions against undervoltage, overvoltage, phase sequence, phase failure, and asymmetry. Additionally, it includes 1 x automatic reset and 1 x switching commutation digital inputs.