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According to precisioin digital, the term 'loop-powered' is synonymous with the term '2-wire'. Meaning that only 2 connections/wires are involved in any of the connections between the transmitter, the power source and the output device.
However, PRtrans and M-System, Japan, distinguish between 2-wire and loop-powered elements. For example PRetrans 6185 is Loop-powered signal isolation device, and PRtrans 5131 is 2-wire device.
Is there really a difference between 2-wire and loop-powered devices? In other words, can a 2-wire device NOT be loop-powered or a loop-powered device not be 2-wire?
Thank you in advance
However, PRtrans and M-System, Japan, distinguish between 2-wire and loop-powered elements. For example PRetrans 6185 is Loop-powered signal isolation device, and PRtrans 5131 is 2-wire device.
Is there really a difference between 2-wire and loop-powered devices? In other words, can a 2-wire device NOT be loop-powered or a loop-powered device not be 2-wire?
Thank you in advance