Technical Specifications Rated operating voltage 24 V DC. Maximum discharge current 25 kA. Response time less than 25 ns. Operating temperature ‑40 ℃ to +80 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Module surface protection grade IP20. Complies with IEC 61643‑11 surge protection standards.
Functional Features Absorbs transient surge voltage on signal loop. Provides bidirectional surge protection for signal lines. Built‑in thermal over‑temperature protection unit. Front‑panel status indicator displays module health condition. Supports quick replacement without modifying existing signal wiring.
Application Scenarios Applied for surge protection of analog and digital signal loops in chemical, power and water‑treatment industries. Used for signal‑loop protection of field transmitters and solenoid valves. Suitable for new project construction and on‑site spare‑part replacement.
Performance Parameters Fast surge response effectively suppresses fast transient pulse. Thermal protection safely cuts off module under over‑temperature fault. Status indicator provides clear failure prompt. Normal control signal passes without obvious signal attenuation.
Material Composition Surge absorbing components, thermal protection unit. Flame‑retardant engineering plastic housing. Screw‑type signal wiring terminals. Metal DIN‑rail fastener assembly.
Structural Characteristics Compact DIN‑rail mounting structure. Front‑panel fitted with working‑status indicator. Signal input and output terminals arranged on two sides.
Working Principle When transient surge over‑voltage invades signal loop, internal surge absorbing components conduct rapidly and release surge energy to grounding loop. Thermal protection unit triggers when continuous surge impact causes module over‑temperature. Normal low‑amplitude control signal passes through module without interference.
Installation Requirements Mount module on standard 35 mm DIN‑rail inside cabinet. Connect incoming field signal cable and outgoing cable to I/O module strictly according to wiring diagram.
Usage Notes Ground wire shall adopt short and thick copper conductor. Do not exceed rated operating voltage. Replace module immediately after status indicator shows fault. Periodically inspect wiring and grounding connection condition.
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