Modbus RTU/TCP to Modbus TCP Gateway

Modbus Universal Gateway BL120 Series · 2 or 6 serial ports · Downlink: Modbus RTU Master, Modbus TCP Master · Uplink: Modbus RTU, Modbus TCP ✓ 2 or 6 RS485/RS232 ✓ 512 / 4,000 data points ✓ 10–50 devices ✓ 4G / WiFi / GPS optional ✓ -40~85°C wide temp ⚙️ BL120 2‑Port BL120P 6‑Port Supports 10–50 devices · 512–4,000 data points · Optional 4G/WiFi/GPS ⬇ Modbus RTU Master ⬇ Modbus TCP Master ⬆ Modbus RTU ⬆ Modbus TCP

Key specifications

BL120 (Standard)	BL120P (High‑Performance)
2 × RS485/RS232	6 × RS485/RS232
10	50
512	4,000
Modbus RTU Master · Modbus TCP Master	Modbus RTU Master · Modbus TCP Master
Modbus RTU · Modbus TCP	Modbus RTU · Modbus TCP
✓ L‑E / L‑A / L‑AU / CAT‑1	✓ L‑E / L‑A / L‑AU / CAT‑1
✓ 802.11a/b/g/n	✓ 802.11a/b/g/n
✓ NMEA‑0183	✓ NMEA‑0183
30 × 83 × 110 mm	40 × 83 × 110 mm
133 g	171 g
Small Buildings / Zones	Large Facilities / Campuses

Communication	Ethernet, 4G, WiFi
Downlink Protocol	Modbus RTU, Modbus TCP
Uplink Protocol	Modbus RTU, Modbus TCP
Serial Port	2CH or 6CH RS485/RS232
Baud Rate	2400bps-115200bps
Ethernet Port	1 WAN + 1 LAN

Supply information

Manufacturer	BLIIoT — Beilai Technology Co., Ltd.
Model code	BL120
Full name	BL120 | Modbus RTU/TCP to Modbus TCP Gateway
Category	Modbus gateways
Supplied in Korea by	ACUSYS Co., Ltd. · Official BLIIoT distributor in Korea