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Series HD

2 Amp / 60 Vdc True Output Status, Short Circuit Protection

This all solid state relay utilizes the latest technology to provide a low ON resistance and an optically isolated output. The control (input) and load (output) are optically isolated to protect input logic circuits from voltage and current transients which can occur on the output supply. The optical isolation also provides a full floating output, thus allowing the load to be connected to either output terminal. The control circuit is buffered to enable the relay to be driven directly from standard CMOS or open collector TTL logic circuits. Available options include short circuit and current overload protection, which provides complete protection for both the relay and the system wiring. This feature not only provides protection should a short or overload occur while the relay is on, but will also provide protection should the relay be switched into a short. In either case, the relay will sense the short circuit condition and then block it indefinitely until the short is removed and the unit is reset by cycling the input control. The second option is a status output line. This feature is available in either switch status or trip status configurations. Switch status returns the true status of the output switch and is optically isolated from the load. It provides status indication independent of the control circuit of the relay. The status line provides a logic (0) low when the input circuit is off and load circuit continuity is present. The status line provides a logic 1 (high) when the output is on. Trip status, available only with HD24 Series relays, returns a logic 0 (low) if the output trips off and a logic 1(high) when the output is in a normal mode (on or off). These options are available either together or separately as standard features.

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