The license costs $300 USD per seat. A 10kΩ resistor costs $0.02. This is a forum for hobbyists and tinkerers. If you want to pay for software, go to the vendor's support portal.
Units manufactured between January 2021 and May 2022 shipped with firmware version containing a bug: under severe voltage sag, the device would latch into a "fault" state requiring complete power cycle. The patched firmware ( v2.4 ) corrects this and adds modbus-like debug output via an undocumented serial header (located JP4 on the PCB). gmr32b+phase+controller+manual+patched
The GMR32B has a 4-position DIP switch bank. The original manual described Switch 2 as "Unbalance Enable/Disable". The reveals it actually controls Response Time Mode . The license costs $300 USD per seat
| Parameter | Original (Erroneous) | Patched/Corrected | |-----------|----------------------|-------------------| | Supply Voltage | 200-480V AC (±10%) | 180-520V AC (±15%) | | Phase Unbalance Trip | 8% fixed | 5% to 15% adjustable | | Output Relay | 1x SPDT (5A@250V) | 2x SPDT (1 Alarm, 1 Trip) | | Trip Delay (Phase Loss) | 0.5 sec | 0.2 sec (fixed, non-adjustable) | | Reset Mode | Auto only | Auto / Manual (jumper configurable) | If you want to pay for software, go
The original manual had a scant error code table. The patched version expands it drastically.
Once you've identified the manufacturer, navigate to their support or product documentation section. Use the product name (GMR32B) and any other relevant details to locate the specific manual you're looking for.