Other signal modules
7.4 Position decoder module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)
S7-300 Automation System Module data
7-8 Manual, 08/2006, A5E00105505-04
Firmware update
To extend functions and for troubleshooting, it is possible with the help of STEP 7 HW-
Config to load firmware updates in the operating system memory of the SM 338; POS-
INPUT.
Notice
When you boot the firmware update, the old firmware is deleted. If the firmware update is
interrupted or terminated for some reason, thereafter the SM 338; POS-INPUT ceases to
function properly. Reboot the firmware update and wait until this has completed successfully.
Note
The firmware update is only possible in remote operation if the header assembly (slave
circuit) employed supports the system services required for this.
Wiring and block diagrams
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① Error LED - red
② Connection to CPU ground
③ Twisted-pair cables
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