{"id":"automationdirect-gs21-20p5","model_id":"GS21-20P5","name":"AutomationDirect GS21-20P5","summary":"The GS21-20P5 is an enclosed DURApulse GS20 series general purpose AC variable frequency drive. It takes single-phase 230 VAC input and produces three-phase output for 3-phase induction and permanent magnet AC motors, rated 2.8 A continuous and 1/2 hp with 1-phase input. It supports SVC, V/Hz, FOC and torque control modes and includes integrated dynamic braking, an attached keypad and RS-485/USB communications.","study_notes":["Control modes: SVC, V/Hz, FOC or torque.","Input: 230 VAC single-phase; output: 230 VAC three-phase.","Amperage rating 2.8 A; variable torque amperage rating 3.2 A.","Output frequency range 0.1-599 Hz; carrier frequency range 2-15 kHz.","Communications: RS-485 (RJ45) and USB B; Modbus RTU Slave and Modbus ASCII Slave, up to 115.2k baud.","Optional EtherNet/IP and Modbus TCP card available (not built in).","Analog I/O: 2 input channels (10-bit and 12-bit) accepting +/-10 VDC or 0-20/4-20 mA; 1 output channel (10-bit) 0-10 VDC or 0-20/4-20 mA.","Discrete I/O: 7 sinking/sourcing inputs at 24 VDC; 3 relay/sinking/sourcing outputs at 240 VAC and 48 VDC, including one Form C (SPDT) relay.","Load current 3 A/point for relay outputs, 50 mA/point for discrete outputs.","Programming language: ladder; spring clamp terminals.","Frame size A3; panel or wall mounting; integrated dynamic braking; no integrated EMI filter; reverse capability built in.","Supplied with an attached keypad (GS20A-KPD) and a quick start insert."],"safety_notes":["Safe Torque Off (STO) is built in.","Enclosure rating IP20.","Temperature rating -20 to +50 deg C.","A user-supplied external fuse is required.","UL Listed File # E198015; CE declaration and RoHS status available."],"sources":[{"url":"https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/general_purpose_vfds/gs21-20p5","title":"DURApulse AC General Purpose Drive: 230 VAC, 1/2hp with 1-phase input, (VFD) (PN# GS21-20P5) | AutomationDirect","accessed":"2026-10-26"},{"url":"https://cdn.automationdirect.com/static/specs/cutsheet/GS21-20P5_cutsheet.pdf","title":"GS21 20P5 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":[],"supply_voltage":"230 VAC, 1-phase","rated_current_a":2.8,"frame_size":"A3","output_type":"PWM output","ip_rating":"IP20","operating_temp_min_c":-20,"operating_temp_max_c":50,"joints":[],"protocols":["modbus-rtu","modbus-ascii"],"standards":[],"error_codes":[]},"url":"https://machineschema.com/hardware/automationdirect-gs21-20p5","license":"https://creativecommons.org/licenses/by/4.0/"}