![background image](http://html.mh-extra.com/html/sick/dl1000/dl1000_operating-instructions-manual_1263895051.webp)
•
When installing, observe the special requirements which arise as a result of the
surroundings. Apply good professional practice with regard to cable interference:
Best possible separation of cables susceptible to interference (e.g. devices, bus
cables) from faulty cables (e.g. motor control, brakes).
•
The transmission rate of the SSI interface depends on the length of the cable:
Table 24: SSI interface: Maximum transmission rate depending on the length of cable
Length of cable
Transfer rate
< 25 m
500 kHz
< 50 m
400 kHz
< 100 m
300 kHz
< 200 m
200 kHz
< 400 m
100 kHz
6.2.1
Digital outputs
The digital outputs are designed as push-pull outputs. That means that the signal on Q
i
is connected either to L
+
(for PNP controls) or M (for NPN controls) depending on the
active state.
L+
Q
i
M
R
L
PNP
NPN
L+
Q
i
M
R
L
Figure 18: Digital output simplified diagram
The “Active status” function (can be configured using the device menu) specifies what
electric voltage level is applied to the digital output based on the switching state of the
respective digital output.
Switching state
Active status (adjustable)
Voltage at Q
i
Active
High
High
Active
Low
Low
Inactive
High
Low
Inactive
Low
High
ELECTRICAL INSTALLATION
6
8024560/1A19/2021-06-30 | SICK
O P E R A T I N G I N S T R U C T I O N S | DT1000 PROFIBUS DP and DL1000 PROFIBUS DP
51
Subject to change without notice