13
AED
MECHANICAL CONSTRUCTION
4.3
Mechanical construction of the AED9301B
1
LED4
3
2
LED3
LED2
LED1
4
5
6
1 AD103C amplifier connection
2 Power supply and digital I/Os (electrically isolated from AD103C and PROFIBUS)
3 Transducer connection
4 Address interface setting
5 PROFIBUS connection (electrically isolated)
6 Diagnostic bus
7 Bus termination (PROFIBUS) and PROFIBUS disconnection (for diagnosis)
7
Fig. 4.3
Mechanical construction of the AED9301B
LED
Function
Explanation
LED1
(green)
PROFIBUS power sup
ply
The LED lights up to indicate that there is a
supply voltage to the interface driver.
LED2
(green)
PROFIBUS
data exchange
Shows the status of the cyclical data exchange.
LED3
(yellow)
PROFIBUS diagnosis
The LED lights up if there is an internal error.
The measurement data may be invalid.
LED4 (red)
PROFIBUS error
The LED lights up if there is an bus error.
Possible causes:
- Incorrect wiring (A and B transposed?)
- PROFIBUS master not (yet) working