“Resistance is futile, Buwhahaha” exclaimed the villain, rubbing his hands together in glee as our hero struggled to free himself from the ropes that bound him. Yep, we’ve all seen those Grade B movies. Maybe in that situation resistance is futile, but in the world of electronics and HVAC controls resistance (electrical resistance) is very […]
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“Currently” Playing: Connecting A 4-20 mA Constant-Current Signal To Multiple Loads
One of the most popular and long-lived methods for transmitting analog control signals in the HVAC and industrial control worlds is the “constant-current signal loop.” In this scheme, the value of the current flowing in the circuit is the control variable, rather than any voltages that may appear at different points in the circuit. The […]
Read PostConnecting A Voltage-Output Signal Source To Multiple Loads
The Tech Support crew here at Kele frequently gets quizzed by customers who have a voltage-output signal source which must drive multiple voltage-input loads. Requests for “voltage signal replicators” come in frequently. Sometimes extra hardware is needed, but sometimes it isn’t! So we thought it might be a good idea to write an article addressing […]
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