ABB AC500 PLC, Hardware Manual, Page: 67 / 1315

The terminal base type depends on the number of communication modules which are used
together with the processor module and on the processor module's network interface type (1x
Ethernet, 2x Ethernet or ARCNET).
Each processor module can operate multiple communication modules through its communica-
tion module interface (defined by the terminal base).
The communication modules are mounted on the left side of the processor module on the same
terminal base.
On the right side of the processor module, up to 10 digital or analog I/O expansion modules can
be connected to the I/O bus. Each I/O module requires a suitable terminal unit depending on the
module type.
Terminal bases, terminal units, I/O modules, communication modules and accessories have
their own technical descriptions.
Each processor module can be used as:
● Stand-alone processor module
● Stand-alone processor module with local IOs
● Remote IO Server
● Remote IO Client
The processor modules (except PM591-2ETH) can be used as a slave with
– PROFIBUS
– DeviceNet
– CANopen
The processor modules are powered with 24 VDC.
WARNING!
Removal/Insertion under power
The devices are not designed for removal or insertion under power. Because of
unforeseeable consequences, it is not allowed to plug or unplug devices with
the power being ON.
Make sure that all voltage sources (supply and process voltage) are switched
off before you
– connect or disconnect any signal or terminal block
– remove, mount or replace a module.
Disconnecting any powered devices while energized in a hazardous location
could result in an electric arc, which could create a flammable ignition resulting
in fire or explosion.
Make sure that power is removed and that the area has been thoroughly
checked to ensure that flammable materials are not present prior to proceeding.
The devices must not be opened when in operation. The same applies to the
network interfaces.
The processor module PM595 is described in a separate device description
Ä
Chapter 1.2.2.2 “PM595” on page 80.
Device Specifications
Processor Modules > AC500 (Standard)
2019/04/17 3ADR010121, 13, en_US 67