⚠️ : The GMR-32B must always sample power from the input/power side of the three-phase electrical supply. Never install the phase controller on the output side of variable frequency drives (VFDs), inverters, or variable frequency currents. Doing so will cause immediate unit failure or severe diagnostic errors due to pulse-width modulation harmonics. Mounting the Base
The device utilizes a "Common" and "NO" (Normally Open) point for control wiring; if the power supply is correct, the relay completes the circuit to allow the motor contactor to operate. Wiring Summary
Never rely solely on generic online guides. Incorrect wiring or parameter settings can destroy the unit or create fire hazards.
380VAC (nominal, with variants for 440/460V) Contact Capacity: 250VAC / 6A or 30VDC / 3A Conventional Heating Current: 8A Power Consumption: ≤ 10VA Ambient Temperature: -10°C to +55°C gmr-32b phase controller manual
Press and hold for 3 seconds to enter the configuration menu. Use UP or DOWN to scroll through the parameter codes. Press ENTER to edit a parameter value. Adjust the value using UP/DOWN , then press ENTER to save. Key Parameter Codes P-01: Control Input Mode 0 : 4-20mA Input (Default) 1 : 0-10V DC Input 2 : Manual Potentiometer P-02: Output Soft-Start Time
Minimum 2500V AC between power and control circuits
Use insulated copper wire sized between 1.0 mm² and 2.5 mm². ⚠️ : The GMR-32B must always sample power
: Turn off power, safely swap incoming lines L1 and L2, and turn power back on. The Reverse Phase red LED must turn on immediately, and the downstream contactor must remain open. Switch power off and return the wiring to the original sequence. Troubleshooting Common Faults
If your motor or device fails to start, the GMR-32B may be protecting it from a faulty power supply. Potential Cause Wrong phase sequence Switch any two of the three input phases (L1, L2, L3). Relay flashes/flickers Voltage instability (high/low) Check for voltage fluctuations using a multimeter. Output circuit is dead Phase loss (one phase is down) Check incoming power lines for a dead phase. Device is hot Ambient temp too high / Overload Ensure ventilation in the control cabinet. 6. Maintenance and Safety
This usually indicates the phase sequence is incorrect. Power down and swap any two of the three input wires (L1/L2/L3) to correct the rotation. Relay Not Engaging: Mounting the Base The device utilizes a "Common"
Triggers when the physical phase sequence of R, S, and T lines is incorrectly ordered. If a reverse sequence is detected before or during system startup, the reverse phase lamp lights up, preventing motors from running backward and destroying internal mechanics. 4. Overvoltage Protection (Red Indicator)
If using single-strand solid wire, strip 8mm of insulation and insert it directly into the sampling terminals.
: The internal switching mechanism provides an electrically inseparable circuit with separate NC and NO pathways. Wire the chosen terminal pair inline with the primary electromagnetic contactor’s command loop. If a fault occurs, the loop de-energizes, snapping the contactor open and separating the motor load from the line. LED Status Diagnostics
