+24V*
CDM420-0001
PNP sensor
4
V
S
GND
Out
GND
S6
ON
OFF
S6 : SGND-GND
V
S ext
Shield
A
Sensor
B
37 SGND
6
Shield
39 +24 V*
Trigger sensor
1
3
2
+24V*
CDM420-0001
GND
S6
ON
OFF
S6 : SGND-GND
Shield
A
Sensor
B
37 SGND
6
Shield
39 +24 V*
1
V
S ext
GND
A
37
2
2
Figure 80: Left: Trigger sensor connected potential-free and supplied with power externally. Right: Alternatively switch,
!
sup‐
plied with power by connection module CDM420-0001 or
"
connected potential-free and supplied with power externally.
Switch setting S6 then as in left figure.
1
Trigger sensor, e.g. for read cycle generation
2
External supply voltage V
S
ext
3
PNP sensor
4
Supply voltage V
S
Table 69: Assignment of placeholders to the digital inputs
CDM420-0001
Device
Terminal A
Signal B
Pin C
Sensor D
38
Sensor 1
14
1
39
Sensor 2
4
2
Function of switch S6
Table 70: Switch S6: SGND - GND
Switch setting
Function
ON
GND of the trigger sensor connected with GND of CDM420-0001 and
GND of the device
OFF
Trigger sensor connected potential-free at CDM420-0001 and device.
Common, isolated reference potential of all digital inputs is SGND.
Characteristic data of the digital inputs
Table 71: Characteristic data of the digital inputs “Sensor 1” and “Sensor 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
13
ANNEX
124
O P E R A T I N G I N S T R U C T I O N S | Lector621
8022502/15NT/2020-02-11 | SICK
Subject to change without notice
