Siemens SM 338 User Manual

2-3
SM 338 Equipment Manual
(4) J31069-D401-U1-A0-7618
The LED indicators on the front of the module have the functions listed in
table 2-1.
Table 2-1 LED indicators
Indicator
Function
DC (green)
External voltage present
External voltage not present
SF (red)
System error/module requires diagnosis
Normal operation
LED indicators
The SM
3
3
8
Modu
l
e

Siemens SM 338 Specifications

General

Brand	Siemens
Model	SM 338
Category	Control Unit
Language	English