Turck BL20-1RS232 Modular Digital Input Module

The Turck BL20-1RS232 serial communication module provides a single RS232 interface for the BL20 modular I/O system, delivering reliable full‑duplex serial device communication between field equipment and PLC networks. Commonly installed in packaging machinery, conveyors, barcode scanning stations, printing systems, and manufacturing equipment requiring RS232 serial communication between field devices and PLC networks, it connects serial devices to modern control systems while keeping the BL20 architecture adaptable to multiple fieldbus backplanes. Key specs include one RS232 channel at 300 to 115200 baud, RxD, TxD, RTS, CTS signals, 128‑byte receive and 64‑byte transmit buffers, 24 VDC supply via the BL20 backplane, typical power consumption ≤1 W, galvanic isolation through optocouplers, and IP20 protection. Its compact 12.6 × 74.1 × 55.4 mm form factor plugs into the BL20 base, supports screw or cage clamp terminal connections, operates 0 to 55°C (storage -25 to 85°C), and carries CE, cULus, Class I Division 2, Zone 2 approvals.