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7000 Bus Converter User Manual (version 1.2,Feb/2003, 7PH-006-10) --------------- 26
The 7520R is designed for PLC networking. During normal
conditions, the PLC system will have a stable DC-24V power source. The
user may use this power source to 7520R(configuration A). When using
7520, the user must use another power source, PWR-24
(configuration B).
The isolation feature is very important in real world applications, therefore
the user should pay attention when selecting the correct module. If the wrong
module is selected, the isolation will be removed but the module will still
function OK. This may cause unexpected damaged by high-energy transients
on a RS-485 network.
7520R
7520
RS-485
PWR-24