Rockwell Automation Publication 1756-UM058G-EN-P - November 2012 235
Appendix E
Motor Starters for Digital I/O Modules
This appendix provides data to help you choose a ControlLogix digital I/O
module to drive Bulletin 500 series motor starters in your application. The tables
list the number of motor starters (five sizes are listed for each module) that a
particular digital I/O module can drive.
When using the tables, remember that the supply voltage for each module
must not drop below the minimum state motor starter supply voltage.
Table 61 - Maximum Allowed 2-3 Pole Motor Starters (120V AC/60 Hz)
Cat. No. Motor Starters
Size 0…1 Size 2 Size 3 Size 4 Size 5
1756-0A16I 16 15 @ 30 °C (86 °F)
12 @ 60 °C (140 °F)
13 @ 30 °C (86 °F)
10 @ 60 °C (140 °F)
8 @ 30 °C (86 °F)
6 @ 60 °C (140 °F)
5 @ 30 °C (86 °F)
4 @ 60 °C (140 °F)
1756-OA16 16 14 (only 7 per group) 4
(Only 2 per group)
None None
1756-OA8 8 8 8 8 @ 30 °C (86 °F)
6 @ 60 °C (140 °F)
5 @ 30 °C (86 °F)
4 @ 60 °C (140 °F)
1756-OA8D 8 8 8 None None
1756-OA8E 8 8 8 6 (only 3 per group) 6 @ 30 °C (86 °F)
(only 3 per group)
4 @ 60 °C (140 °F)
(only 2 per group)
Table 62 - Maximum Allowed 2-3 Pole Motor Starters (230V AC/60 Hz)
Cat. No. Motor Starters
Size 0-1 Size 2 Size 3 Size 4 Size 5
1756-OA16I 16 16 16 16 @ 30 °C (86 °F)
13 @ 60 °C (140 °F)
11 @ 30 °C (86 °F)
9 @ 60 °C (140 °F)
1756-OA16 16 16 16 4 (only 2 per group) 2 (only 1 per group)
1756-OA8 8 8 8 8 8
Table 63 - Maximum Allowed 2-3 Pole Motor Starters (24V AC/60 Hz)
Cat. No. Motor Starters
Size 0-1 Size 2 Size 3 Size 4 Size 5
1756-ON8 4 @ 30 °C (86 °F)
3 @ 60 °C (140 °F)
4 @ 30 °C (86 °F)
3 @ 60 °C (140 °F)
None None None
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