{"id":"automationdirect-gs4-4125","model_id":"GS4-4125","name":"AutomationDirect DURApulse GS4-4125","summary":"The GS4-4125 is an open-frame AC variable frequency drive in the AutomationDirect DURApulse GS4 series. It takes a 460 VAC three-phase input and is rated 125 hp with three-phase input, driving three-phase induction motors in either sensorless vector control (SVC) or V/Hz mode. It provides an RS-485 (RJ12) port, analog and discrete I/O, and requires an external dynamic braking unit.","study_notes":["Open frame enclosure, panel or wall mounting, frame size E.","Enclosure rating is IP00 and IP20.","Control mode SVC or V/Hz; carrier frequency range 2-15 kHz; output frequency range 0.1-599 Hz.","Rated 460 VAC input and output, 3 input phases and 3 output phases, 125 hp with 3-phase input.","Amperage rating 171 A; variable torque amperage rating 180 A.","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; an external dynamic braking unit is required.","Discrete I/O: 8 sinking/sourcing inputs at 24 VDC, 4 outputs (240 VAC and 48 VDC, relay/sinking/sourcing) with 2 Form C (SPDT) relays.","Analog I/O: 3 current/voltage inputs (11-bit, 0-20 mA and 4-20 mA, +/-10 VDC) and 2 current/voltage outputs (10-bit, 0-20 mA and 4-20 mA, 0-10 VDC).","Programming language is ladder; connectors are screw terminals; no integrated EMI filter and not internally bypassed.","Item shipping weight is 160 lb; country of origin Taiwan."],"safety_notes":["Safe Torque Off (STO) is built in.","UL Listed file # E198015; UL Recognized and UL Hazardous file numbers listed as none; CE and RoHS compliant.","Operating temperature rating -10 to +50 deg C.","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/gs4-4125","title":"DURApulse AC High-performance Drive: 460 VAC, 125hp with 3-phase input, (VFD) (PN# GS4-4125) | AutomationDirect","accessed":"2026-10-26"},{"url":"https://cdn.automationdirect.com/static/specs/cutsheet/GS4-4125_cutsheet.pdf","title":"GS4 4125 cutsheet","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":7,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"hardware","spec":{"category":"vfd","manufacturer":"automationdirect","controllers":[],"supply_voltage":"460 VAC","frame_size":"E","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-gs4-4125","license":"https://creativecommons.org/licenses/by/4.0/"}