Zxd 3000 User | Manual 2021 !!install!!

| Terminal | Function (typical) | |----------|-------------------| | A1, A2 | Power supply (L, N or +24V, 0V) | | A3, A4 | Thermocouple input (TC) or RTD (Pt100) | | A5, A6 | 4–20mA transmitter input | | B1, B2 | Relay output (NO/COM) – heating control | | B3, B4 | SSR drive voltage (0-12V DC) | | B5, B6 | Alarm 1 (high/low deviation) | | B7, B8 | RS485 (Modbus RTU) A/B |

Steady light indicates the AC input is normal and the module is functioning. zxd 3000 user manual 2021

The manual recommends: