Allen-Bradley Micro820 User Manual

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 31
Wire Your Controller Chapter 4
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.
If the outputs are DC, we recommend that you use an 1N4004 diode for surge
suppression, as shown below. For inductive DC load devices, a diode is suitable. A
1N4004 diode is acceptable for most applications. A surge suppressor can also be
used. See Recommended Surge Suppressors
on page32. As shown below, these
surge suppression circuits connect directly across the load device.
Suitable surge suppression methods for inductive AC load devices include a
varistor, an RC network, or an Allen-Bradley surge suppressor, all shown below.
These components must be appropriately rated to suppress the switching
+DC or L1
Suppression
device
DC COM or L2
AC or DC
outputs
Load
VAC/DC
Out 0
Out 1
Out 2
Out 3
Out 4
Out 5
Out
6
COM
+24V DC
IN4004 diode
Relay or solid
state DC outputs
24V DC common
VAC/DC
Out 0
Out 1
Out 2
Out 3
Out 4
Out 5
Out 6
COM
A surge suppressor
can also be used.

Allen-Bradley Micro820 Specifications

General

Processor	32-bit
Power Supply	24V DC
Programming Software	Connected Components Workbench
Series	Micro800
Mounting	DIN Rail
Memory	Embedded
Expansion	Yes
Controller Type	Programmable Logic Controller (PLC)
Communication	Ethernet/IP
Programming Language	Ladder Diagram, Function Block Diagram, Structured Text
I/O	Embedded