Omron CS1W-CT021, Operation Manual

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Section 1-2
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Mounting Restrictions The CS1W-CT021/CT041 High-speed Counter Unit is a Special I/O Unit belong-
ing to the CS1-Series.
CS1W- CT021/CT041 High-speed Counter Units can be mounted to either CS1
CPU Racks or CS1 Expansion Racks. These High-speed Counter Units cannot be
mounted to C200H Expansion I/O Racks or SYSMAC BUS Slave Racks.
Note If you want the CS1W-CT021/CT041 High-speed Counter Unit to generate inter-
rupts to the CPU, the Unit should be mounted on a CS1 CPU Rack. CS1 Expan-
sion Racks do not support interrupts.
The maximum number of CS1W-CT021/CT041 High-speed Counter Units that
can be mounted to a CS1 CPU Rack or CS1 Expansion Rack is equal to the
number of slots of the Rack. In a configuration with multiple Racks the maximum
number of CS1-CT021/CT041 High-speed Counter Units is limited to 24 because
the Unit is allocated 40 CIO-words and 400 DM-words in the Special I/O Unit Area.
Furthermore, the number of High-speed Counter Units that can be mounted to
one Rack (i.e., a CPU Rack or Expansion Rack) depends on the maximum supply
current from the Power Supply Unit that supplies the Rack and the current con-
sumption of other Units on the Rack.
I/O Connection Methods To connect the In- and Output signal wires to the Unit two methods are available:
1. Directly connecting the wires by soldering them to the external connector.
2. Indirectly connecting the wires by connecting them to screw terminals on a Ter-
minal Block Unit. The Omron Terminal Block Unit (XW2B-40G4 or XW2B-
40G5) is connected to the Unit via standard available Omron flat-cables
(XW2Z-xxxB).
Refer to 2-3-2 "Connector Wiring Methods" for more details.
W902-E2-03.book Seite 6 Donnerstag, 7. Oktober 2004 2:06 14