Reliance 27106-27S
Description
Product Description
Model Number Interpretation
27106: Base part number for GV3000 brake interface module.
27: 27 Ω nominal braking resistance.
S: Standard duty (general-purpose, low-to-medium cycling).
Technical Specifications
Resistance: 27 Ω (±5%).
Power Rating: 1.2 kW continuous; 4 kW peak (10% duty cycle).
DC Bus Voltage: 380–460 VAC input (540–650 VDC bus).
Switching Element: Wearless transistor switch (terminals 1(−)/2(+)).
Control Logic: Closes when DC bus >50 V and braking current =0; opens during active braking.
LED Indicator: Right LED ON when braking current (IB) >0.
Enclosure: Open-frame PCB, panel-mount.
Operating Temperature: 0°C to +50°C.
Weight: ~0.5 kg (1.1 lbs).
Interface & Wiring
DC Bus Terminals: Connect to drive’s DC+ / DC−.
Resistor Terminals: 1(−) / 2(+) for external 27 Ω braking resistor.
Control Signal: Tied to drive’s braking logic (no external wiring needed).
LED Status: IB>0 (braking active) → ON; IB=0 → OFF.
Core Functions
Regenerative Energy Dissipation: Converts motor regenerative energy to heat via external resistors, preventing DC bus overvoltage.
Smooth Deceleration: Enables controlled stops for moderate-inertia loads (conveyors, pumps).
Overvoltage Protection: Shunts excess DC bus voltage during deceleration, safeguarding drive components.
Status Indication: LED provides visual braking status for troubleshooting.
Compatibility
Drive Series: GV3000/SE (Sensorless Enhanced), VTAC7 (HVAC).
Drive Models: 25V4160, 25G4160, 25G4260, 3V4160, etc.
Input Voltage: 380–460 VAC three-phase.
Installation & Maintenance
Mounting: Secure to panel near drive; allow 50 mm clearance for airflow.
Wiring: Use 14–16 AWG stranded wire for DC bus/resistor connections; torque terminals to 1.2 N·m.
Pre-Power Check: Verify resistor resistance (27 Ω ±5%); check for short circuits.
Maintenance: Inspect terminals annually for looseness/corrosion; clean dust from PCB.
Safety: Disconnect drive power and wait 5 minutes for DC bus discharge before service.
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