Allen-Bradley MicroLogix 1200 User Manual

Publication 1762-UM001D-EN-P - March 2004
3-4 Wiring Your Controller
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 Table 3.2 for
recommended suppressors. 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 transient characteristic of
the particular inductive device. See the table on page 3-5 for
recommended suppressors.
+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
Out 7
COM
(A surge suppressor
can also be used.)
Surge Suppression for Inductive ac Load Devices
Output Device Output DeviceOutput Device
Varistor
RC Network
Surge
Suppressor

Allen-Bradley MicroLogix 1200 Specifications

General

Series	MicroLogix 1200
Type	Programmable Logic Controller (PLC)
Mounting	DIN rail or panel mount
Programming Language	Ladder Logic
Programming Software	RSLogix 500
I/O Points	Up to 40
Communication Ports	RS-232, RS-485
Memory	6 KB user memory
Power Supply	24V DC or 120/240V AC
Expansion	Supports expansion I/O modules
Operating Temperature	0°C to 55°C (32°F to 131°F)
Dimensions	90 mm x 110 mm
Weight	0.5 kg (1.1 lbs)