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[DRR245] Isolation

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user7736
Posts: 19
Joined: 25/02/2014, 13:37

[DRR245] Isolation

Post by user7736 »

Hello,

Is DRR245 grounds isolated?
Pixsys tecnico 1
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Re: DRR245 ground

Post by Pixsys tecnico 1 »

Hi,
power supply is isolated form Analog input, also analog output is isolated form power supply. Power supply only need neutral and phase line, not ground (isolated).
user7736
Posts: 19
Joined: 25/02/2014, 13:37

Re: [DRR245] Isolation

Post by user7736 »

Hi,

we have one place where we have some problems with Modbus communication.
When there is no connection with Input sensor (PT100 - 3 wire), then we can read process value trough Modbus, but when we connect PT100, we can not reach DRR245.
HAve You seen such kind of situation?
Pixsys tecnico 1
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Joined: 29/10/2010, 10:09
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Re: [DRR245] Isolation

Post by Pixsys tecnico 1 »

Hi,
try to connect the PT100 to the DRR245 but keep the probe on your hand or on a isolated table (wood etc). I think is because the rs485 shield is connected to the ground and also the cable of the probe (in this way you lose the insulation).
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