I'm putting together a new PLC setup (perhaps my most complicated one so far) and have some questions about fusing. Lets start at the beginning.
Power supply. 30W. 0.9A input at 100V. 0.6A at 240. Will run it at 120V. So it will draw a bit under 0.9A at full load. 1.3A output at 24VDC. Where am I best off fusing it? I will be running a PLC on this, (+/- 22W, IIRC) and it's inputs. Do I need to fuse the power supply on both sides, in and out? How big do the fuses need to be, and of what type, fast acting, what's the difference between all the letters, AGC, AGX, etc.
Inputs, some are float switches, pushbuttons, and a contact from a motor drive. Fuse them seperate or together? Just off the powersupply and that's it?
Outputs, 120VAC for the most part, most go to relays, and contactors. Is a fuse on the common(s) enough? Max amp on the common is 8A, and each relay output is 2A.
On a somewhat related topic, when am I best off using transistor out/vs a relay output? What does it take to run an external relay off of a transistor output? How about indicator lights, LED andincadescent?
Power supply. 30W. 0.9A input at 100V. 0.6A at 240. Will run it at 120V. So it will draw a bit under 0.9A at full load. 1.3A output at 24VDC. Where am I best off fusing it? I will be running a PLC on this, (+/- 22W, IIRC) and it's inputs. Do I need to fuse the power supply on both sides, in and out? How big do the fuses need to be, and of what type, fast acting, what's the difference between all the letters, AGC, AGX, etc.
Inputs, some are float switches, pushbuttons, and a contact from a motor drive. Fuse them seperate or together? Just off the powersupply and that's it?
Outputs, 120VAC for the most part, most go to relays, and contactors. Is a fuse on the common(s) enough? Max amp on the common is 8A, and each relay output is 2A.
On a somewhat related topic, when am I best off using transistor out/vs a relay output? What does it take to run an external relay off of a transistor output? How about indicator lights, LED andincadescent?