SSP North AB
30/08/2018
Manual V2f
32
8 Bus communication via radio and/or CAN-bus
Both S14 and S16 can have a radio card and a CAN card for bus communication. A system of up to 16
Safety Simplifiers can use 16 Global Memories (GM) from any other Safety Simplifier for safety
functions as well as for information reasons. If there is a radio card and a CAN card in a Safety
Simplifier both as a default setting are sending the status of the GM:s. A safety Simplifier will use the
status from the fastest bus. The wireless system will repeat the GM:s between each other. A CAN bus
only sends the GM: s to the ones connected to the same CAN bus cable. A CAN bus have however 16
extra CAN memories which are sent on the CAN bus only. See the programming manual to see how to
use the GM: s and CAN memories for safety functions and for non-safety functions.
The wireless card needs to be ordered from beginning for a Safety Simplifier. A CAN card can be
mounted anytime. It is easy to connect a CAN card into a Safety Simplifier and it is fixed by pushing it
into place and secured with a screw.
The terminals for the voltage supply on the CAN card is named +V and -V. These are used when the
CAN is supplied from the terminals in a safety Simplifier. This supply is then connected to terminal 2+
and 3 -which is to be connected to the CAN-bus for other units. It is important that the supply is only
connected to units with the same ground. Normally only one connection is needed. 1S is intended for
the shield in a CAN bus cable if needed. 4H and 5L is for the CAN-bus signals which are optocoupled
to the CPU CAN bus connection. The numbers from 1 to 5 is in line with the standard for M12 contacts
to the CAN bus. The CAN card also has a switch for connecting a resistor 120 Ohm which is needed
on both ends of a CAN bus cable. Up to 16 units can be connected to each other on CAN bus
9 Calculating PFH-d values
PFH-d value for Safety Simplifiers:
-
Single conductor input PFH-d: 4.60 x 10
-9
Figure 8.1: Wiring diagram for CAN-bus connections between Safety Simplifier
Содержание Safety Simplifier
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