Replacing Afd4 / Afd4 (Fm) / Afd8 And Afs - Siemens SIMATIC AFD4 Product Information

Cleaning
Explosion hazard in Zone 22
The layer of dust on the enclosure of the AFD4 / AFD4 (FM) / AFD8 / AFS must not exceed
a thickness of 5 mm.
Remove the dust layer on the enclosure regularly!
Note
Following cleaning, run a functional check of the AFD4 / AFD4 (FM) / AFD8 / AFS.
2.7

Replacing AFD4 / AFD4 (FM) / AFD8 and AFS

Explosion hazard
In mixed operation with AFD (6ES7157-0AF81-0XA0), disconnect the FDC 157 couplers
from the voltage before you replace the AFD4 (6ES7157-0AG81-0XA0), AFD4 (FM)
(6ES7655-5DX40-1AA1) and AFD8 (6ES7157-0AG82-0XA0) field distributors.
Note
Read the safety instructions in the section Safety instructions for connection (Page 14).
Replacing active field distributor AFD4 / AFD4 (FM) / AFD8
Note
At points where you want to connect devices, replace the blanking caps inserted in the
delivery state with FM-approved screwed glands (cable gland, metric, with sealing ring: M
16x1.5: L= 8-10mm, M 20x1.5: L= 8-10mm, torque (1.8 Nm)).
Explosion hazard
In hazardous area Zone 2, you are not permitted to disconnect the main line from an AFD4
/ AFD4 (FM) / AFD8 during operation if it is connected directly to a FDC 157 coupler or an
AFS.
Before you start the work, disconnect the FDC 157 coupler(s) from the voltage.
Active field distributors AFD4, AFD4 (FM), AFD8 and AFS
Product Information, 02/2015, A5E03775304-AC
WARNING
DANGER
DANGER
2.7 Replacing AFD4 / AFD4 (FM) / AFD8 and AFS
Installing and connecting
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