Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS - Manual (Page 149)

Publication 1764-UM001B-EN-P - April 2002
System Loading and Heat Dissipation F-3
ensure that the maximum available 4K data table size will not be
exceeded. Refer to the 1769-SDN User Manual for more details.
4. Enter the current draw values in the “Calculated Current”
columns. Add up the current draw values to determine the
“SUBTOTAL2” values.
5. Verify that the total number of modules does not exceed the
system limits using the maximum values for the base unit and
Table F.5 for the expansion power supply, if used.
Table F.2 Selecting Hardware: Expansion I/O
Select I/O Modules for Each Bank: Bus Current Draw
Specification (mA) Calculate Current Draw:
Expansion I/O
Modules
Catalog Number
Base Unit
Expansion
(1)
Bank 1
(2) Calculated Current for
Base Unit Expansion (mA) Calculated Current for
Bank 1 Power Supply
(mA)
(3)
2250 mA max 400 mA max
n1 n2 X Y n1 x X n1 x Y n2 x X n2 x Y
Number of Modules
(4) at 5V dc at 24V dc at 5V dc at 24V dc at 5V dc at 24V dc
1769-HSC
(5) 425 0
1769-IA16 115 0
1769-IA8I 90 0
1769-IF4 (Series A) 120 150
1769-IF4 (Series B) 120 60
1769-IF4XOF2 120 160
1769-IM12 100 0
1769-IQ16 115 0
1769-IQ6XOW4 105 50
1769-IR6 100 45
1769-IT6 100 40
1769-OA8 145 0
1769-OA16 225 0
1769-OB16 200 0
1769-OB16P 160 0
1769-OF2 (Series A) 120 200
1769-OF2 (Series B) 120 120
1769-OV16 200 0
1769-OW8 125 100
1769-OW8I 125 100
1769-OW16 205 180
1769-SDN 440 0
TOTAL MODULES: SUBTOTAL2: (A2) (B2) (C) (D)
(1) May not exceed 8 I/O modules.
(2) No more than 8 I/O modules on either sid e of the power supply.
(3) Maximum value depends on the power supply chosen.
(4) Up to 16 modules may be used in a MicroLogix 1500 system when using a Series B Base Unit and Series C processor (up to 8 for Series A Base Units).
A maximum of 8 modules can be connected directly to the Base Unit.
A maximum of 8 modules can be connected to each side of the Expansion Power Supply.
(5) No more than 4 I/O modules may be connected to the base unit or to either side of the expansion power supply when the 1769-HSC or 1769-SDN are used in the system.