Using The Dp/Asi Link; Integrating The Dp/Asi Link - Siemens SIMATIC Distributed I/O System DP/ASi Link Manual

Overview
1.1

Using the DP/ASi Link

Definition
The DP/ASi link connects the Actuator Sensor Interface (referred to in the
following as ASi) to the PROFIBUS-DP.
PROFIBUS-DP conforms to the PROFIBUS-DP standard EN 50170 Vol-
ume 2, PROFIBUS; the term DP means "distributed I/O".
You will find an explanation of how the ASi works in Chapter 2.
ASi and PROFI-
BUS-DP
Figure 1-1
Explanation
Up to 31 binary actuators and sensors are networked over the ASi cable. The
DP/ASi link is used to interface the ASi cable to PROFIBUS-DP. You can
operate up to 122 DP/ASi links to PROFIBUS-DP, should you use the
IM 308-C, for example, as the DP master.
ASi master
ASi allows one ASi master. The DP/ASi link is the ASi master.
IP 66/67 The DP/ASi link meets the IP 66/IP 67 degree of protection.
Installation Owing to the IP 66/IP 67 degree of protection, you can use the DP/ASi link in
a harsh industrial environment. There is no preferred mounting location for
the DP/ASi link.
1-2
Higher level
DP master
DP
slave
Actuator
Lowest level

Integrating the DP/ASi link

PROFIBUS-DP
DP/ASi
link
Actuator Sensor Sensor
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
ASi