Industrial Controller
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Infinite Innovation, the Future of Industrial Control Systems
Infinite Innovation, the Future of Industrial Control Systems
PRODUCT POSITION:HOMEPRODUCT—TO-2-1/EA/SVB
TO-2-1/EA/SVB
Category Parameter Specification / Typical Value Application & Configuration Protected Circuit Signal circuits (e.g., 4-20 mA, digital I/O) Circuit Configuration 2-pole (Line-to-Line and Line-to-Ground protection) Connection In-series with the signal line Electrical Characteristics Nominal Voltage 8 - 24 V DC Max. Continuous Operating Voltage (Uc) ~30 V DC Nominal Current (In) Up to 250 mA Voltage Drop < 1.5 V Surge Protection Performance Standards Complies with IEC 61643-21 Nominal Discharge Current (In) 5 kA (8/20 μs) Max. Discharge Current (Imax) 10 kA (8/20 μs) Protection Level (Up) < 40 V (at In) Monitoring & Signaling (EA Option) Alarm Contact Floating changeover contact (SPDT) Contact Rating Typically 24V DC / 2A (or 230V AC / 2A) Function Changes state upon internal failure of the SPD, signaling the need for replacement. General Data Mounting 35 mm DIN Rail Connection Type Screw terminals (for both signal and alarm contacts) Housing Material Plastic (PA 6.6) Operating Temperature -40 °C to +80 °C Status Indication None (Visual status may not be present; reliance on alarm contact)
DESCRIBE
The Eaton TO-2-1/EA/SVB is a compact, two-pole surge protection device (SPD) designed to safeguard sensitive electronic signal lines, such as 4-20 mA loops, from destructive transient overvoltages. A key feature of this model is the integrated remote alarm contact (EA option), which provides a dry contact signal that changes state if the protective components within the SPD degrade or fail due to repeated surges. This allows for proactive maintenance and system monitoring, making it ideal for critical applications where power quality and system uptime are paramount. It is easily mounted on a standard DIN rail within a control cabinet.
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