Turck BL20-2DO-R-NC Digital Relay Output Module

Description:

The TURCK BL20-2DO-R-NC digital relay output module is used in BL20 distributed I/O and PLC automation systems. Commonly installed in packaging machinery, conveyor systems, assembly equipment, material handling systems, and manufacturing lines requiring relay-based switching of field devices and control circuits. Maintenance teams, OEMs, and system integrators use this part for control system expansion, relay output replacement, machine retrofits, and automation upgrades.

Applications:

The TURCK BL20-2DO-R-NC provides two normally closed relay output channels for controlling contactors, solenoid valves, alarm devices, motors, and auxiliary control circuits within the BL20 modular I/O platform. It is commonly used in packaging machines, automated assembly systems, process automation equipment, conveyor controls, and machine tools where fail-safe relay outputs are required for switching AC or DC loads. The modular BL20 architecture allows the relay module to integrate with multiple industrial fieldbus systems while simplifying maintenance and future system expansion.

Technical Specifications:

• Brand: TURCK
• Part Number: BL20-2DO-R-NC
• Product Type: Digital Relay Output Module
• Series: BL20 I/O System
• Function: Relay output switching module
• Number Of Channels: 2 relay outputs
• Output Type: Normally Closed (NC) relay contacts
• Signal Type: Digital output
• Contact Type: Potential-free relay contacts
• Switching Voltage: Up to 250 VAC / 30 VDC
• Switching Current: Up to 2 A per channel
• Supply Voltage: 24 VDC via BL20 backplane bus
• Electrical Isolation: Galvanically isolated relay outputs
• Connection Technology: Screw terminal or cage clamp terminal base modules
• Mounting Type: Plug-in module for BL20 base system
• Protection Rating: IP20
• Operating Temperature: 0°C to +55°C
• Storage Temperature: -25°C to +85°C
• Dimensions: 12.6 x 74.1 x 55.4 mm
• Diagnostic Features: Channel status and diagnostic LEDs
• Approvals: CE, cULus, Class I Division 2, Zone 2
• Application: Relay switching of motors, contactors, valves, alarms, and industrial control devices
• Special Features: Fieldbus-independent operation, modular architecture, hot-swappable design, integrated diagnostics, isolated relay outputs, fail-safe normally closed contacts.

Common Replacements:

• TURCK BL20-2DO-R-NO
• TURCK BL20-2DO-R-CO
• TURCK BL67-2DO-R-NC