Dcd Inputs - Banner SCR P Series Instruction Manual

Programmable Safety Controller SCR P
WARNING:
•
Adjustable Valve Monitoring (AVM) Operation
•
When the AVM function is used, the Safety Output(s) will not turn ON until the AVM input is
satisfied. This could result in an ON-delay up to the configured AVM monitoring time.
•
It is the user's responsibility to ensure the AVM monitoring time is properly configured for the
application and to instruct all individuals associated with the machine about the possibility of the
ON-Delay effect, which may not be readily apparent to the machine operator or to other
personnel.

6.4.13 DCD Inputs

The Safety Controller safety inputs IN3/IN4 and IN5/IN6 may be used to monitor chains of devices with embedded
Daisy Chain Diagnostic (DCD) data, such as BERNSTEIN SRF Safety Switches. The BERNSTEIN SRF Safety Switches
use RFID technology as a means of detection.
DCD devices, such as SRF Safety Switches, must be placed at an appropriate safety distance (minimum distance),
according to the application standards. Refer to the applicable standards and to the documentation specific to the device
for the appropriate calculations. The response time of the Safety Controller outputs to each safety input is provided on the
Configuration Summary tab in the Software. This time must be added to the response time of the DCD chain of devices.
The active DCD devices' solid-state outputs have (and must have) the ability to detect external shorts to power, to ground,
or to each other. The devices will lockout if such a short is detected.
If the application includes a pass-through hazard (a person could pass through an opened gate and stand undetected on
the hazard side), other safeguarding may be required, and manual reset should be selected. See
p. 36.
Note: In a long chain or chains with a lot of DCD devices, the voltage at the first unit (closest to the
terminating plug) must stay above 19.5 volts for the chain to operate properly.
Note: If the entire chain consists of only door switches, the configuration rules for a gate switch apply.
34 www.bernstein.eu - Tel: + 49 571 793 0
Manual Reset Input on