12.1 LEDs
12.1.1 LEDs on extension modules
For the error diagnostics, multiple LEDs indicating the operating state of the ex-
tension module are located on its front.
Fig. 12-1: LED displays of the extension modules
LED Color Function
RT Ethernet extension module
S Orange LED is cyclically on: Data is sent
L Green LED is permanently on: Connection present
Profibus extension module
Stat Green LED is permanently on: Communication present
LED is acyclically on: Module not configured
LED is cyclically on: Module configured
BF Red LED is permanently on: No connection
LED flashes: Slave diagnostics
Sercos extension module
S Orange LED is cyclically on: Data is sent
L Green LED is permanently on: Connection present
CAN extension module
PW Green LED is permanently on: CAN voltage present
Extension Modules Profibus, RT-
Ethernet, Sercos, CAN
Bosch Rexroth AG
Device description
DOK-CONTRL-XFE**EXTMOD-IT04-EN-P
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