1. Product Parameters
Input Voltage: DC 12V (±10%, Max 15V)
Control Voltage: DC ≤30V / AC ≤250V (10A Max)
Relay Life: 100,000 cycles (With diode surge protection)
Bluetooth Protocol: 2.1+EDR (Class 2, 2.4GHz ISM band)
Control Distance: 10m line-of-sight
Standby Current: ≤11mA, Operational Current: ≤45mA
Operating Temp.: -20°C to +70°C
Dimensions: 62×20×19mm

2. Key Terminal Functions
Power & Control
IN+: DC 12V input positive (Connect to PSU V+)
IN-: DC 12V input ground (Connect to PSU V-)
Relay Output
COM: Common terminal (Load power source input)
NO: Normally Open (Connects to COM when relay ON)
NC: Normally Closed (Disconnects from COM when relay ON)
⚠️ Critical Notes:

NO/NC Safety: Never connect L(Line) and N(Neutral) simultaneously to NO+NC to prevent short circuits .
Bluetooth Pairing: Default PIN 1234, HEX command format required .

3. Common Issues & Solutions
Q1: Relay fails to activate?

Check: Input voltage ≥11V (measure IN+/IN- with multimeter) .
Fix: Ensure HEX commands sent (A00101A2=ON, A00100A1=OFF) .
Q2: Bluetooth disconnects frequently?

Cause: 2.4GHz interference from Wi-Fi/microwaves → Maintain >3m distance .
Reset: Power cycle module + re-pair via "LCBS Control" APP .
Q3: Overheating at >5A load?

Solution:
Limit AC loads ≤80% rated capacity (e.g., ≤8A @250V AC) .
Add heatsink if ambient >50°C .
Q4: No status LED indication?

Diagnose:
Blue LED slow blink = unpaired; solid = paired .
Red LED off = relay open; on = relay closed .