Product specifications

Section 2 Installation Installing SM811/TP868
3BSE036351-510 A 107
Installing SM811/TP868
The SM811 is mounted directly to the CEX-Bus on the processor unit base plate or
to the CEX-Bus interconnection unit BC810. The communication interfaces are
then mounted to the CEX-Bus on the SM811. See Figure 31 on page 100 and
Figure 32 on page 101 for configuration examples. Use the enclosed cable
TK852V010 to connect the SM Link of the two SM811s in case of redundant
configuration.
Digital I/O Connection
The SM811 has a connector with three digital inputs and two digital outputs that can
be used for High Integrity related digital I/O (not process I/O). See Table 11.
The Access Enable input (I2) must be connected to a key switch in the operator’s
panel. The Reset all Forces input (I1) and Hot-insert input (I3) must be connected to
impulse type panel if they are used.
The input signals are used for system function, see AC 800M High Integrity
documentation.
In a redundant configuration, the corresponding digital inputs to both the
SM811’s must be connected to common digital input switches. 
For example, the I3’s of both SM811’s must be connected to a common switch. If
separate sources are used, connect the sources to a common switch, and then
derive connections from the switch to both the SM811’s.
Table 11. SM811 Digital I/O Connector
PIN Designation Description
1 UP Common I/O power
2 I1 Digital input 1 (Reset all forces)
3 I2 Digital input 2 (Access enable)
4 I3 Digital input 3 (Hot-insert of SM)
5 O1 Digital output 1 (Any force active)