As-I Attachments - Siemens simatic c7-621 Hardware Installation Manual

Attaching a C7-621 AS-i
5.1

AS-i Attachments

Properties
The C7-621 AS-i has connectors for two AS-i cables that are connected
internally in the C7. The maximum load on the contacts is 4 A.
You can connect the following to the AS-i connectors:
AS-i CP Power
The AS-i CP is not supplied with power via the 24V DC input. The AS-i CP
Supply must be supplied with power via terminals AS-i+ and AS-i-.
AS-i Power Supply Connect the power supply unit either directly to the C7-621 AS-i or supply
Unit power to the AS-i CP in the C7-621 AS-i by connecting the AS-i power
supply in the network with the actuators or sensors.
Connections and
Figure 5-1 shows the connections and block diagram of the AS-i terminals.
Block Diagram
AS-i-
AS-i+
AS-i-
AS-i+
Figure 5-1 Connections and Block Diagram of the AS-i Terminals
5-2
Actuators, sensors
AS-i power supply unit
View from the right side of the C7-621 AS-i
AS-i terminals
(blue)
Sensor 1
(brown)
Block diagram of
the AS-i terminals
Sensor 2
AS-i
power
supply
unit
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01