CircuitNewb
Member
Hi all,
I'm working on a safety circuit and had some question about fusing.
Incoming supply - 120V/15A
Power supply - PSL-24-060 https://cdn.automationdirect.com/static/manuals/psxinstall/PSL-24-060.pdf
Safety relay - Pilzs S4 + S7 expansion module
VFD - Inverteck P2 with STO
Supply -> 24V power supply -> safety relay -> VFD
My question i was wondering is if i need to fuse/cb betweem each component here?
for example Supply -> 24v PSW -> (fuse/cb) -> safety relay - (fuse/cb on the outputs to STO)
The power supply states that the max inrush current it can handle is 30amps and has an internal fuse (t3.15 amps/250VAc) the power supply manual states I should use a minimum value of 16A B- or 8 A C- characteristic but unsure of what amperage to use?
for the fuse between the power supply and safety relay the pilzs s4 shows a max inrush current of .5 amps, but the expansion module lists a a maximum impulse of 2.7 amps. how do i size this fuse/cb?
Lastly for the safety outputs - these will be connected to the STO terminals of some VFD's and the Inverteck P2 drive specifies a switching current of 100mA. Do i need any protection on the output side as well ?
Hope this makes sense, I am new to safety circuits and circuits in general.
Thanks.
I'm working on a safety circuit and had some question about fusing.
Incoming supply - 120V/15A
Power supply - PSL-24-060 https://cdn.automationdirect.com/static/manuals/psxinstall/PSL-24-060.pdf
Safety relay - Pilzs S4 + S7 expansion module
VFD - Inverteck P2 with STO
Supply -> 24V power supply -> safety relay -> VFD
My question i was wondering is if i need to fuse/cb betweem each component here?
for example Supply -> 24v PSW -> (fuse/cb) -> safety relay - (fuse/cb on the outputs to STO)
The power supply states that the max inrush current it can handle is 30amps and has an internal fuse (t3.15 amps/250VAc) the power supply manual states I should use a minimum value of 16A B- or 8 A C- characteristic but unsure of what amperage to use?
for the fuse between the power supply and safety relay the pilzs s4 shows a max inrush current of .5 amps, but the expansion module lists a a maximum impulse of 2.7 amps. how do i size this fuse/cb?
Lastly for the safety outputs - these will be connected to the STO terminals of some VFD's and the Inverteck P2 drive specifies a switching current of 100mA. Do i need any protection on the output side as well ?
Hope this makes sense, I am new to safety circuits and circuits in general.
Thanks.