{"id":"automationdirect-gs4-4020","model_id":"GS4-4020","name":"AutomationDirect DURApulse GS4-4020","summary":"The GS4-4020 is a DURApulse GS4 series AC variable frequency drive rated for 20 hp on a 460 VAC three-phase input. It runs three-phase induction motors in either sensorless vector (SVC) or V/Hz mode, with an output frequency range of 0.1 to 599 Hz and integrated dynamic braking. It provides 8 discrete inputs, 4 discrete outputs and analog I/O, plus an RS-485 port using Modbus RTU, Modbus ASCII or BACnet.","study_notes":["Series GS4, high-performance controller type; enclosure NEMA 1, panel or wall mounting, frame size B.","Rated 20 hp with 3-phase input; amperage rating 30 A, variable torque rating 32 A; 460 VAC nominal input and output.","Control mode is SVC or V/Hz; carrier frequency 2-15 kHz; output frequency range 0.1-599 Hz.","Digital I/O: 8 discrete inputs at 24 VDC (sinking/sourcing) and 4 discrete outputs rated 240 VAC and 48 VDC (relay/sinking/sourcing), with 2 Form C (SPDT) relays.","Analog I/O: 3 input channels (current/voltage, 11-bit, 0-20 mA and 4-20 mA, +/-10 VDC) and 2 output channels (10-bit, 0-20 mA and 4-20 mA, 0-10 VDC).","RS-485 (RJ12) port supports Modbus RTU, Modbus ASCII and BACnet at up to 115.2k baud.","Optional EtherNet/IP and Modbus TCP cards are available; no integrated EMI filter; not internally bypassed.","Reverse capability is built in; programming language is ladder logic (GSLOGIC drive PLC software and GSOFT2 configuration software).","Shipping weight is 15.5 lb (about 7.03 kg); country of origin India."],"safety_notes":["Safe Torque Off (STO) is built-in.","IP20 rating with NEMA 1 enclosure.","Operating temperature rating -10 to +50 degrees C.","UL Listed File # E198015; RoHS status yes (see CE declaration); no CSA file listed.","A user-supplied external fuse is required."],"sources":[{"url":"https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-4020","title":"DURApulse AC High-performance Drive: 460 VAC, 20hp with 3-phase input, (VFD) (PN# GS4-4020) | AutomationDirect","accessed":"2026-10-26"},{"url":"https://cdn.automationdirect.com/static/specs/cutsheet/GS4-4020_cutsheet.pdf","title":"GS4 4020 cutsheet","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":9,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"hardware","spec":{"category":"vfd","manufacturer":"automationdirect","controllers":[],"supply_voltage":"460 VAC","frame_size":"B","output_type":"PWM output","ip_rating":"IP20","operating_temp_min_c":-10,"operating_temp_max_c":50,"joints":[],"protocols":["modbus-rtu","modbus-ascii"],"standards":[],"error_codes":[]},"url":"https://machineschema.com/hardware/automationdirect-gs4-4020","license":"https://creativecommons.org/licenses/by/4.0/"}