User guide

Hardware
890 USE 108 00 August 2001 23
A120 I/O Support The Compact Controllers work with Modicon’s A120 Series of low-cost I/O modules.
A120 modules are available in densities of four, eight, and sixteen discrete I/O
points; eight analog input channels; and two, four, and eight analog output channels.
In addition, speciality modules for positioning, servo control, simulators and filler
modules are available. Each module uses a standardized pair of screw-type terminal
blocks that facilitate easy access and easy field wiring; because the terminal blocks
are standardized and removable, they allow you to make module changes without
disturbing connections. A tool (AS-0TBP-000) to facilitate the removal of terminal
blocks is shipped with each Compact Controller.
Detailed descriptions of available A120 modules are found in the A120 Series I/O
Modules User Guide (890 USE 109 00 formerly GM-A984-IOS). To be sure that your
documentation is up to date, check with Modicon Customer Support or your area
distributor for the current revision level of this document.
Power Supplies The A984s, E984-24x/25x, and the E984-258/265/275/285 CPUs use a +24 Vdc
source, and have a built-in power converter to provide 5 Vdc to the bus.
2.5 A is available across the I/O bus for all modules in A984s, E984-24x/251/255
systems.
2.5 A is available across the I/O bus for all modules in E984-258/285 systems.
3.0 A is available across the I/O bus for all modules in E984-265/275 systems.
Five optional power supplies are available: a P120-000 (115/230 Vac input), a P120-
125 (125 Vdc input), a P120-250 (240 Vac input), a PRTU-252 (240 Vac input), and
a PRTU-258 (240 Vac input) that provide +24 Vdc to the CPU.These external power
supplies may be used with any of the Compacts. See P120-000 Power Supply,
p. 178 for detailed specifications.