Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS User 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.