Siemens SIMATIC PCS 7 System Manual page 75

Module
AI 8x16Bit
Use in voltage measurement
The "wire break" diagnostics function in HW Config must not be activated, neither when operating the modules with
•
transmitters nor when thermocouples are connected.
Use in indirect current measurement
Use a 250 ohm resistor (measuring range 1 - 5 V) to map the current on a voltage; see figure 11-4.
•
Use in direct current measurement
Suitable Zener diode: BZX85C8v2
•
Load capability of 4-wire transmitters: R
•
(determined for worst case: 1 input + 1 Zener diode at an S7 overload value 24 mA to R
Input voltage in the circuit when operating with a 2-wire transmitter:
•
U < 15 V (determined for worst case: 1 input + 1 Zener diode at an S7 overload value 24 mA to U
e-2w
U )
z max
AI 6xTC 16Bit iso, 6ES7331-7PE10-0AB0
Notice: These modules must only be used with redundant encoders.
You can use this module with Version 3.5 or higher of FB 450 "RED_IN" in the library "Redundant IO MGP" and Version
5.8 or higher of FB 450 "RED_IN" in the library "Redundant IO CGP" V50.
Observe the following when measuring temperatures by means of thermocouples and assigned redundancy:
The value specified in "Redundancy" under "Tolerance window" is always based on 2764.8 °C. For example, a tolerance
of 27 °C is checked if "1" is entered, or a tolerance of 138 °C is checked if "5" is entered.
A firmware update is not possible in redundant operation.
Online calibration is not possible in redundant operation.
Use in voltage measurement
The "wire break" diagnostics function in HW Config must not be activated when operating the modules with thermo-
•
couples.
Use in indirect current measurement
Due to the maximum voltage range +/- 1 V, the indirect current measurement can be carried out exclusively via a 50
•
ohm resistor. Mapping that conforms to the system is only possible for the area +/- 20 mA.
AI 4x15Bit [EEx ib]
You cannot use the module in redundant operation for applications in hazardous areas.
It is not suitable for indirect current measurement.
Use in direct current measurement
Suitable Zener diode: BZX85C6v2
•
Load capability of 4-wire transmitters: RB > 325 ohms
•
determined for worst case: 1 input + 1 Zener diode at an S7 overload value 24 mA to RB = (RE * I
Input voltage for 2-wire transmitters: Ue–2w < 8 V
•
determined for worst case: 1 input + 1 Zener diode at an S7 overload value 24 mA to Ue–2w = RE * I
Note: You can only connect 2-wire transmitters with a 24 V external supply or 4-wire transmitters. The internal power sup-
ply for transmitters cannot be used in the circuit shown in figure 11-4 because it outputs only 13 V, which means in the
worst case it would supply only 5 V to the transmitter.
AI 8x0/4...20mA HART
A firmware update is not possible in redundant operation.
Online calibration is not possible in redundant operation.
ET 200M Distributed I/O Device; HART Analog Modules
See Manual
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB
4.7 Connecting redundant I/O to the PROFIBUS DP interface
> 610 ohms
B
Article No.
6ES7 331-7NF10-0AB0
= (R
B
6ES7331-7PE10-0AB0
6ES7331-7RD00-0AB0
6ES7 331-7TF01-0AB0
manual
I/O configuration variants
* I + U )/I
E max z max max)
= R * I +
e-2w E max
U )/I
max + z max max
+ U
max z max
75