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DIGITAL INPUT MODULE
General Description
The ACE3600 Digital Input (DI) module can have 16 or 32 inputs.
The following DI modules are available.
•
16 DI Fast 24V
•
32 DI Fast 24V
•
16 DI Fast 24V IEC TYPE 2
•
32 DI Fast 24V IEC TYPE 2
•
32 DI Fast 48V
Two types of voltage ("wet") inputs are supported, IEC 61131-2 Type II compliant inputs and
24V "MOSCAD compatible" inputs. In the 32 DI module, the first 20 inputs can function as
fast counters. In the 16 DI module, all inputs can function as fast counters. A counter's
maximum rate is dependent on the module type (see the specifications below.)
All the inputs are optically isolated. All DI modules except the 32 DI 48V module support
optional 24V DC floating plug-in power supplies (for contact "wetting" or other purposes).
Each DI can be an event trigger (interrupt-driven) to a high priority fast process. The high
priority fast process enables very fast activation of an output in response to an input trigger
and logical conditions. This high priority fast process is not dependent on the I/O scan (refer
to the STS Application Programmer manual.)
For a description of I/O module construction, location, LEDs, TBs, and other common I/O
module features, see the I/O Modules chapter above.
Figure 6-1 provides a general view of the ACE3600 DI module.
6-1
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