Siemens SIMATIC 6DL1 136-6AA00-0PH1 - Page 19

Firmware update
The supply voltage L+ must be available on the I/O module at the start of 󹪝rmware updates and
during the update.
The 󹪝rmware can only be updated in the STOP mode of the F-CPU.
Recommendation: Internal sensor supply
We recommend to always use the short-circuit proof internal sensor supply of the F-module.
In the event of an error when using the internal sensor supply, the channel is passivated and the
diagnostics provide information about the cause.
If there are short-circuits in the wiring or at the sensor, the input is also protected.
To guarantee the correct channel-speci󹪝c reaction in the event of an error of the internal sensor
supply, you must use the sensor supply assigned to the channel. If you do not observe this
assignment, channels that are not a󹪜ected may be in󹪞uenced or passivated.
Note
The internal sensor supply is switched o󹪜 if there is a short-circuit to ground.
The sensor supply is also switched o󹪜 when the channel detects an over󹪞ow.
A check is made as to whether the error is still persisting after about 30 seconds.
External/internal sensor supply
The pictures in "Applications cases of the I/O module (Page 37)" section show how you can
supply the sensors via an external sensor supply (e.g. via another module).
WARNING
Short-circuit from L+ to I
n
+ or I
n
-
If there is a short-circuit from I
n
+ or I
n
-, the input resistors may be destroyed, depending on the
selected type of circuit.
This can be avoided by an appropriate short-circuit-proof circuit or by using the internal sensor
supply. When using an external sensor supply, other suitable measures are required to protect
the input resistors (external 50 mA "Fast-acting" fuse in the input circuit of the F-module).
(FAIW-016)
Connection
4.3 Schematic circuit diagram
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA 19