HBK AED 9101D, Руководство по эксплуатации

Страница: 39 / 104

37
AED
CONNECTING INTERFACES AND I/OS
7.4 AED9301B
7.4.1 Connection to the PROFIBUS
To next device
S2
S3
Bus termination
Bus
disconnection
on
off
on
off
A
A B
B
B A
KL3
A
B
From the master
S5 S4
Address settings
Fig. 7.12 Pin assignment and switch positions for PROFIBUS
The PROFIBUS DP is standardized as per IEC61158 / EN50170. The AED is a PROFIBUS
DP slave as per DIN19245-3. The PROFIBUS is electrically isolated from the measuring
system and the supply voltage. The maximum possible bit rate is 12Mbit/s. Set the node
address using S4 and S5:
Address = S4 + 10 • S5 (permitted address range: 3...99)
Set the address in the deactivated state; it is read in by the AED when the supply voltage
is applied. The factory-set address is 03.
PROFIBUS connection KL3 has four terminals, so that you can route it to the next bus
node. Use shielded, twisted-pair cables as connecting cables.
Activate the bus termination at both ends of the PROFIBUS cable. Bus termination may
only be activated at the end points of the bus (max. 2 termination resistors active). If nec­
essary, slide switch S2 (bus termination) on the AED to on. The factory setting is off.
You can disconnect the module from PROFIBUS for the purpose of diagnosis: Switch S3
to off. The factory setting is on.