Allen-Bradley MicroLogix 1200 User Manual

Publication 1762-UM001D-EN-P - March 2004
System Loading and Heat Dissipation F-5
System Loading Example Calculations (40-Point Controller)
Current Loading
Table F.7 Validating Systems using 1762-L24AWA, 1762-L24BXB, 1762-L24AWAR or 1762-L24BXBR
Maximum Allowable Values Calculated Values
Current: Current (Subtotal 1 from Table F.5 + Subtotal 2 from Table F.6.):
400 mA at 5V dc 350 mA at 24V dc mA at 5V dc mA at 24V dc
System Loading: System Loading:
10.4 Watts
= (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW
= __________ mW
= __________ W
Table F.8 Validating Systems using 1762-L24BWA or 1762-L24BWAR
Maximum Allowable Values Calculated Values
Current for Devices Connected to the +24V dc Sensor
Supply:
Sum of all sensor currents
Include 1761-NET-AIC here rather than in Table F.5, if it is powered externally by
the sensor supply
250 mA at 24V dc mA at 24V dc
Current for MicroLogix Accessories and Expansion I/O: Current (Subtotal 1 from Table F.5 + Subtotal 2 from Table F.6.)
400 mA at 5V dc 350 mA at 24V dc mA at 5 V dc mA at 24V dc
System Loading: System Loading:
12 Watts
= (________ mA x 24V) + (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW + __________ mW
= __________ mW
= __________ W
Table F.9 Calculating the Current for MicroLogix Accessories
Catalog Number Device Current Requirements Calculated Current
at 5V dc (mA) at 24V dc (mA) at 5V dc
(mA)
at 24V dc
(mA)
1761-NET-AIC
(1)
when powered by the base unit
communications port, selector switch in the up position
0 120 0 120
Subtotal 1: 0 120
(1) This is an optional accessory. Current is consumed only if the accessory is installed.

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)