I/O-Bus; General; Wiring; Number Of User Data, Bus Cycle Time And Data Security - ABB Advant AC500 Manual

I/O-Bus

General

The synchronized serial I/O-Bus connects the I/O expansion modules with the AC500 CPU or with the
S500 FBP Interface Module.
The I/O-Bus provides the following signals:
•
Supply voltage of 3.3 V DC for feeding the electronic interface components
•
3 data lines for the synchronized serial data exchange
•
several control signals
With its fast data transmission, the I/O-Bus obtains very low reaction times. Up to 7 I/O expansion
modules can be connected to a AC500 CPU or an FBP Interface Module.
If both of the following conditions are fulfilled, max. 10 I/O expansion modules can be connected to
the I/O-Bus of the CPU:
- PS501 as of version V1.2
- CPUs as of firmware V1.2.0
General data:
Supply voltage, signal level
Max. supply current
Max. number of I/O expansion modules (slaves
on the I/O-Bus)
Type of the data interface
Bus data transmission speed
Minimum bus cycle time
Electrical isolation
Protection against electrostatic discharge (ESD)
Max. bus length
¹) Minimum bus cycle time: This value is valid for all module combinations (from 1 to 7 expansion
modules)
Wiring (bus connection)
Bus connection
Mechanical connection
Max. bus length

Number of user data, bus cycle time and data security

See details before
____________________________________________________________________________________________________________
V2
AC500 Hardware
3.3 V DC ± 10 %
30 mA per expansion module
7 with the S500 FBP Interface Module with max.
4 analog modules (with up to 16 channels each),
7 with the AC500 CPU (digital or analog),
10 with the AC500 CPU (PS501 as of V1.2 with
CPUs with firmware as of V1.2.0)
synchronized serial data exchange
1.8 Mb/s
500 µs ¹)
no isolation between the modules, but isolation
against the process supply voltage and the I/O
terminals
with an internal varistor
1 m
left-side and right-side connection from module to module via a 10-
pole HE plug (male at the left side, female at the right side)
established by the Terminal Units
1 m
1-32 System data
AC500 / Issued: 05.2007