The DIN 0 / Pulse A input pin may also be configured for low-level mV input signals. The four selectable ranges
determine the
turn-on threshold (TH)
and the
turn-off threshold (TL)
which are used to set the ACTIVE level of
the digital input.
6.3.3
Mixed Input Interface
When set to the mixed input mode, the SS-015 can accept one process signal and one digital pulse input. To
configure the digital pulse and process inputs, follow these steps:
Figure 18: SYNC interface digital and process configuration
Step 1:
Click the
Inputs
configuration tab on SYNC and choose the
Digital, Process
type from the
Type
drop-down.
Step 2:
For each respective channel, select the type of digital or process input in the
Device
Range/Type
drop-down. Click
Apply Settings
when done.
For additional information regarding pin wiring for the single digital and single process mixed mode, refer to the
wiring diagrams on page 8.
6.3.3.1
Digital Inputs (Mixed Mode)
The following table lists the available digital input configuration options available when in mixed mode.
Some options available in digital-only mode are not available in mixed mode. Descriptions and example
diagrams are provided starting in section
5.3.1.1 Pulse Measurements
.
Selection
Measurement
Description
DIN
Digital Input
2-bit binary digital input
RATE
Frequency
Measures the frequency of rising edges
WIDTH
Pulse Width
Measures the active time of a signal
DUTY
Duty Cycle
Measures the % of active time of a signal
COUNT
Up Counter / Totalizer Counter with Enable and Reset
Important:
Digital input signals (pulse inputs)
must
be referenced to ground when
Mixed Mode
is used.
Negative offsets at pulse inputs may cause interference and noisy/incorrect readings in analog (mA/V)
process input signals.
Setting High Threshold
(ON)
Low Threshold
(OFF)
100 mV
75 mV
37.5 mV
500 mV
375 mV
187.5 mV
1.0 V
0.75 V
DC
0.375 V
DC
2.0 V
1.5 V
DC
0.75 V
DC
Figure 17: Active High/Low Threshold example
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