{"id":"automationdirect-gs4-2020","model_id":"GS4-2020","name":"AutomationDirect GS4-2020","summary":"The GS4-2020 is a DURApulse GS4 series AC variable frequency drive in a NEMA 1 enclosure. It runs 3-phase induction motors from a 230 VAC supply, rated 20 hp with 3-phase input and 7-1/2 hp with 1-phase input, using either sensorless vector control (SVC) or V/Hz mode. It has an RS-485 port, integrated dynamic braking, a built-in keypad and screw terminals, with optional EtherNet/IP and Modbus TCP cards.","study_notes":["Rated 20 hp at 62 A with 3-phase 230 VAC input and 7-1/2 hp at 25 A with 1-phase input; variable torque amperage rating 65 A.","Nominal input and output voltage 230 VAC; 3-phase output; only 3-phase induction motors listed as the intended load.","Control mode is SVC (sensorless vector) or V/Hz; output frequency range 0.1 to 599 Hz; carrier frequency range 2 to 15 kHz.","Communication is one RS-485 port on an RJ12 connector supporting Modbus RTU, Modbus ASCII and BACnet at up to 115.2k baud.","Discrete I/O: 8 inputs at 24 VDC (sinking/sourcing) and 4 outputs at 240 VAC / 48 VDC, including 2 Form C (SPDT) relays; load current 3 A per relay point and 50 mA per discrete point.","Analog I/O: 3 inputs (11-bit, 0-20 mA and 4-20 mA, +/-10 VDC) and 2 outputs (10-bit, 0-20 mA and 4-20 mA, 0-10 VDC); input signal also accepts voltage or potentiometer input.","Output type is PWM; reverse capability is built in; the drive has no integrated EMI filter and is not internally bypassed.","Programmable in ladder logic; GSLOGIC drive PLC software and GSOFT2 configuration software are listed.","Frame size C; mounting is panel or wall; connection type is screw terminals.","Shipping weight 26.7 lb (about 12.1 kg).","Optional EtherNet/IP and Modbus TCP communication cards are available; BACnet and EtherNet/IP are not part of the built-in port protocols."],"safety_notes":["Safe Torque Off (STO) is built in.","A user-supplied external fuse is required.","Agency approvals: UL Listed file E198015; RoHS status Yes (see CE declaration); CE declarations and EU REACH document available; no UL Recognized, UL Hazardous or CSA file numbers."],"sources":[{"url":"https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-2020","title":"DURApulse AC High-performance Drive: 230 VAC, 20hp with 3-phase input, 7-1/2hp with 1-phase input, (VFD) (PN# GS4-2020) | AutomationDirect","accessed":"2026-10-26"},{"url":"https://cdn.automationdirect.com/static/specs/cutsheet/GS4-2020_cutsheet.pdf","title":"GS4 2020 cutsheet","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":10,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"hardware","spec":{"category":"vfd","manufacturer":"automationdirect","controllers":[],"weight_kg":12.11,"supply_voltage":"230 VAC","frame_size":"C","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-gs4-2020","license":"https://creativecommons.org/licenses/by/4.0/"}