NORSTAT Safety Relays - Handbuch (Seite 132)

application guide safety relays from riese electronic page
128
c) RS-NAGU.1b
muting controller with fieldbus
Function:
The function of RS-NAGU.1b is the same like RS-NAGU.1 (see page 76)
There is one main difference between RS-NAGU.1b and RS-NAGU.1. RS-NAGU.1b could be
connected to fieldbus-system like AS-i Bus or INTERBUS.
All application from RS-NAGU.1 could be used for RS-NAGU.1b
Interface of the RS-NAGU.1b
Failure detection
To get a failure message from the RS-NAGU.1b the FA1 or FI1 connects a high signal (TTL) on the
data inputs. In this way the controllers in the RS-NAGU.1b knows that he must connect the actual
failure code to his outputs.
This signals were then send to the main control unit.
Detection of the Control-Bits
In a period way all inputs were read and all outputs were written with information.
The numbers of slaves is responsible for the time of one period. It could be between 200µs and 5ms.
In the first step the controllers say if an error had happened. The controller does not send the failure
information in this step.
In the next step the slave sets his data output on a high signal.
When the data output of the slave (FA1 or FI1) are set the RS-NAGU.1b is able to send the failure
code.
The main control system could now detect this. The time of this two steps are the period time. The
delay time which is the result of the this two steps lies between 20ms and 50ms.
That means only after 50ms a new detection of the status is possible. This is the time which is need to
make the transfer of information to the PC.
RS-NAGU.1b has four outputs and three inputs. This ports were leaded outside the device by a SUB-
D9 connector.
SUB-D9 Pining
D0 ... D4
data outputs
P0 ... P2 data inputs
2
1
3
4
5
6
7
8
9
5VC2
GND
D0
D1
D2
D3
P0
P1
P2
Pining
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