Specifications

IP 252 Expansion IP 240
By expanding the IP 252 with IP 240 modules, it is possible to provide two or more control loops
with actual values from incremental encoders.
In these cases, the IP 240 operates as a slave module for the IP 252.
Branch 1
Current setpoint
Branch 1
Current setpoint
Actual speed
Setpoint speed
IP 240
Channel 1
IP 252
IP 240
Channel 1
Channel 2
++
+
+
Control loop 1
PID
PID
Control loop 2
++
+
+
PID
Control loop 3
Branch 8
Branch 10
++
+
+
Branch 8
Branch 10
Actual speed
Branch 8
Branch 10
Actual speed
Setpoint speed
Setpoint speed
Branch 1
Current setpoint
Fig. 9-2. Actual Speed Measurement via the IP 240 Module
Note
If two or more IP 252 closed-loop control modules are used in one central con-
troller, both channels on an IP 240 must be assigned to the same IP 252. An IP 240
cannot be accessed by more than one IP 252.
Each channel of an IP 240 can provide only one control loop with data.
IP 240
1
IP 240
2
IP 240
3
IP 252
1
IP 252
2
This connection is illegal
Fig. 9-3. Assignment of IP 240 Modules to IP 252 Modules
9-2 EWA 4NEB 811 6120-02a