1
Trigger sensor, e.g. for read cycle generation
2
External supply voltage V
S ext
3
Input voltage V
in
4
PNP sensor
5
Supply voltage V
S
Table 36: Assignment of placeholders to the external digital inputs
CDB650-204 (physical inputs)
Device (logical inputs)
Terminal A
Signal B
External input C
16
EXT. IN 1
1
17
EXT. IN 2
2
Function of switch S3
Table 37: Switch S3: SGND - GND
Switch setting
Function
ON
GND of the trigger sensor connected with GND of CDB650-204 and
CMC600.
OFF
Trigger sensor connected potential-free at CDB650-204 and CMC600.
Common, isolated reference potential of all digital inputs is SGND.
Functional principle of the external digital inputs
The optional CMC600 parameter cloning module in combination with the CDB or CDM
connection module offers two additional physical digital inputs for the device. The
inputs are available at the respective terminals of the connection module. To distin‐
guish them from the physical digital inputs directly on the device, these addition inputs
via the CMC600 are designated as “external inputs”.
NOTE
The CMC600 transmits the switching signals of the external digital inputs as statuses to
the local inputs of the device via its serial data interface.
The digital inputs are not suitable for time-critical applications.
Characteristic data of the digital inputs
Table 38: Characteristic data of the digital inputs “External input 1” and “External input 2”
Type
Switching
Switching behavior
Power to the input starts the assigned function, e.g. start read cycle.
Default setting in the device: logic not inverted (active high), debounce
time 10 ms
Properties
•
Opto-decoupled, reverse polarity protected
•
Can be wired with PNP output of a trigger sensor
Electrical values
Low: V
in
1)
≤ 2 V; I
in
2)
≤ 0.3 mA
High: 6 V ≤ V
in
≤ 30 V; 0.7 mA ≤ I
in
≤ 5 mA
1)
Input voltage.
2)
Input current.
NOTE
Assign the functions for the external digital inputs in the device using a configuration
tool, e.g., the SOPAS ET configuration software.
ANNEX
13
8022502/15NT/2020-02-11 | SICK
O P E R A T I N G I N S T R U C T I O N S | Lector621
85
Subject to change without notice
