Allen-Bradley micrologix 1500, Руководство пользователя

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Publication 1764-UM001A-US-P
Wiring Your Controller 3-3
Wiring with Spade Lugs
The diameter of the terminal screw head is 5.5 mm (0.220 in.). The input and
output terminals of the MicroLogix 1500 base unit are designed for a 6.35mm
(0.25 in.) wide spade (standard for #6 screw for up to 14 AWG) or a 4 mm (metric
#4) fork terminal.
When using spade lugs, use a small, flat-blade screwdriver to pry the finger-safe
cover from the terminal blocks as shown below. Then loosen the terminal screw.
Using Surge
Suppressors Inductive load devices, such as motor starters and solenoids, require the use of
some type of surge suppression to protect and extend the operating life of the
controller’s output contacts. Switching inductive loads without surge suppression
can
significantly reduce the life expectancy of relay contacts. By adding a
suppression device directly across the coil of an inductive device, you prolong the
life of the output or relay contacts. You also reduce the effects of voltage transients
and electrical noise from radiating into adjacent systems.
The following diagram shows an output with a suppression device. We recommend
that you locate the suppression device as close as possible to the load device.
Finger-Safe
Cover
VAC/
Out 0
Out 1
Out 2
Out 3
Out 4
Out 5
Out 6
Out 7
COM
+dc or L1
Suppression
Device
dc COM or L2
ac or dc
Outputs
AB Spares