Specifications

AS-Interface Slaves
I/O modules for operation in the field
Digital I/O modules IP67 - K20
6/91
Siemens IK PI · 2009
6
■ Design (continued)
All K20 modules (except ASIsafe versions) support, as far as
technically possible, the extended address mode and can be
addressed with an A or B address. Up to 62 slaves can be con-
nected accordingly to one AS-Interface network. The version
with four inputs and four outputs (3RK2 400-1CT30-0AA3) works
according to the new AS-Interface specification 3.0. With
specification 3.0 even A/B slaves can have four outputs (instead
of only three possible up to now with specification 2.1). Please
note, however, that these modules can be used only with a new
master according to AS-Interface specification 3.0 (e.g. the new
DP/AS-i LINK Advanced) and that the cycle times for the outputs
can extend to max. 20 ms.
Connection
AS-Interface M12 feeders and distributor, closed
AS-Interface M12 feeders and distributor, open
A new series of AS-Interface distributors and M12 feeders
is available for easy connection of the K20 modules to the
AS-Interface flat cable:
AS-Interface distributors
Like the AS-Interface 3RK1 901-1NN00 standard distributor, the
new AS-Interface 3RK1 901-1NN10 compact distributor enables
the AS-Interface flat cable to be distributed to several lines. The
compact distributor can be used for a current carrying capacity
up to 6 A. It is characterized by particularly simple handling.
• Insert the cable
• Swing shut and
• Secure in the closed position with only one captive screw.
No additional seals are required for the compact distributor. The
AS-Interface flat cable must always be routed through the com-
pact distributor, i.e. you must never terminate it in the compact
distributor. For higher currents or for when one of the two flat
cables has to be terminated in the distributor, use the standard
distributor.
AS-Interface M12 feeders
AS-Interface M12 feeders are available in the same design as
the compact distributor. These versions are required for transi-
tion from the AS-Interface flat cable to a round cable. The spec-
trum covers AS-Interface M12 feeders with various cable
lengths (1 and 2 m) and distinguishes between M12 feeders for
AS-i/U
aux
for connecting I/O modules or AS-Interface without
U
aux
for connecting modules with inputs. These AS-Interface
M12 feeders are just as easy to use as the AS-Interface compact
distributor. The flat cable must always be routed through the
M12 distributors, i. e. you must never terminate it in the M12
distributors. For cases requiring the AS-Interface flat cable to be
terminated in the M12 feeder, use the standard M12 feeder
(3RX9 801-0AA00) or the quadruple M12 feeder
(3RK1 901-1NR00).