fastbike
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Hi
I have an automation network spread over a power and data bus that is about 1000 m (yards) long. Most of the equipment is is 3 panels spaced along this bus.
The power supply is provided by battery backed switched mode power supplies that output 13.8 volts - one in each panel.
Total current drawn is approx 5 Amps which should be shared between the power supplies.
I have recently replaced one of the power supplies with a smps rated at 12v (adj) 45 W (**broken link removed**). I adjusted the output to 13.8 v using a 35w bulb as a dummy load.
However, when I wire the power supply onto the bus, I find it is not providing any current. The power supply is not faulty as it will light the bulb when removed from the bus.
I have monitored the other power supplies and they are providing all the current. If I switch them off, the new power supply takes over.
Does anyone know what is going on here ?
Thanks
D
I have an automation network spread over a power and data bus that is about 1000 m (yards) long. Most of the equipment is is 3 panels spaced along this bus.
The power supply is provided by battery backed switched mode power supplies that output 13.8 volts - one in each panel.
Total current drawn is approx 5 Amps which should be shared between the power supplies.
I have recently replaced one of the power supplies with a smps rated at 12v (adj) 45 W (**broken link removed**). I adjusted the output to 13.8 v using a 35w bulb as a dummy load.
However, when I wire the power supply onto the bus, I find it is not providing any current. The power supply is not faulty as it will light the bulb when removed from the bus.
I have monitored the other power supplies and they are providing all the current. If I switch them off, the new power supply takes over.
Does anyone know what is going on here ?
Thanks
D