Catalog ST PCS 7 - March 2007

© Siemens AG 2007
Communication
PROFIBUS PA
Active field distributor AFD and active field splitter
AFS
■ Overview
■ Technical specifications
Active field distributor AFD and active field splitter AFS
Active field distributor AFD
Connection of PROFIBUS PA field • Max. 4 per AFD
devices
• Max. 31 per ring
• Operating environment up to
zone 2 or 22
• Max. current consumption of all
devices 1 A
Current Imax. per spur line X1 to X4 60 mA
Power supply 16 V DC (16 ... 32 V)
Current consumption Approx. 20 mA
Power loss Approx. 600 mW
Output voltage for PA section 31 V ± 1V DC
Voltage failure bridging 5 ms
Output current for PA section (for 1A
Active field distributor AFD
dimensioning of device configuration)
An active field distributor (AFD) can integrate up to 4 PROFIBUS Diagnostic displays Status PA main line PA1, PA2
PA field devices via short-circuit proof spur line connections into
a PROFIBUS PA ring with automatic bus termination. The PROFI-
BUS PA ring is connected to two FDC 157-0 DP/PA couplers of
a DP/PA router. Up to 8 AFDs and up to 31 PROFIBUS PA de-
(green)
Fault PA main line PA1, PA2 (red)
Status/fault PA spur line X1 to X4
(green)
vices can be configured per ring. The number of PROFIBUS PA Permissible operating temperature -25 ... +70 °C
devices is additionally limited by the max. current consumption
of 1 A for all devices.
An AFD can be replaced during operation. The function of the
PROFIBUS PA devices on the other AFDs is not influenced by
Dimensions (W x H x D) in mm
Weight
Active field splitter AFS
120 x 57 x 80
Approx. 700 g
this.
Connection of PROFIBUS PA field • Max. 31 per line
Active field splitter AFS
devices
• Operating environment up to
zone 2 or 22
The active field splitter (AFS) connects a PROFIBUS PA line with
two redundant FDC 157-0 DP/PA couplers of a DP/PA router. The
• Max. current consumption of all
devices 1 A
AFS switches the PROFIBUS PA line to the active one of the two
redundant couplers.
Up to 31 PROFIBUS PA devices can be connected on the
PROFIBUS PA line. This number is additionally limited by the
Power supply
Current consumption
Power loss
16 V DC (16 ... 32 V)
Approx. 20 mA
Approx. 600 mW
max. current consumption of 1 A for all devices.
Output voltage for PA section 31 V ± 1V DC
■ Selection and Ordering Data Order No.
Voltage failure bridging
Output current for PA section (for
5 ms
1A
Active field distributor AFD
with 4 short-circuit-proof spur line
6ES7 157-0AF81-0XA0 B) dimensioning of device configuration)
connections for integration of field
devices
Diagnostic displays Status PA main line PA1, PA2
(green)
Active field splitter AFS
6ES7 157-0AF82-0XA0 B)
Fault PA main line PA1, PA2 (red)
for connecting a PROFIBUS PA
line to 2 redundant FDC 157-0
DP/PA couplers; automatic
Permissible operating temperature
Dimensions (W x H x D) in mm
-25 ... +70 °C
120 x 57 x 80
switchover to the active coupler
Weight Approx. 700 g
Profile rail adapter
for an active field distributor AFD
or active field splitter AFS,
optional
6ES7 157-0AF83-0XA0
Siemens ST PCS 7 · March 2007
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