Not all electronic circuit protectors (ECP) are batting a thousand, and some failures can cause damage to sensitive electronic components long before the breaker trips. What if you could mitigate your risk without relying on the power source? Historically, the power supply will control circuit protection but if the fault is the result of a wiring problem or mechanical failures, the power supply may not shut down in time.
Protecting 24vdc control circuits can be tricky. Electronic components can be more sensitive than traditional AC/electro-mechanical ones. Most fuses and mini circuit breakers were designed with AC in mind and can leave power supplies and 24v components exposed causing unexplained trips and damaged parts. As industrial controls migrate toward 24vdc we may want to reconsider the methods we use to protect them.
ECPs are specifically designed to be placed on the secondary of a power supply providing more accurate and safer protection. Rockwell’s 1694 ECP takes a modular approach to solving these issues; the user selects a power feed module, protection module(s) for individual load(s), and a distribution module.
First: ECP modules can act as a class 2 power source. Most power supplies are not rated for class 2; devices requiring class 2 power often require a second, energy limited, power supply (many sensors, PLCs, network switches). With an ECP you can feed multiple class 2 loads from a single set up.
Second: ECPs have multi-color status indicators allowing fast diagnosis of problems: green for connected loads, yellow for 90% load capacity and red for disconnected loads.
Third: ECPs can disconnect individual loads before a power supply self-protects/shuts down. Remaining loads will be unaffected by the single module tripping (i.e. increased productivity).
Rockwell Automation’s new 1694 ECP is like the Shortstop protecting your controls – nothing gets by the Shortstop. To learn more about how it can protect your controls, run through this interactive demo to review all the bases.
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