Siemens SIPART PS2 PA 6DR55 Series, Руководство по эксплуатации

Страница: 62 / 292

Installing the optional modules
5.3 Alarm unit
SIPART PS2 with PROFIBUS communication
62
Operating Instructions, 09/2007, A5E00127926-07
5.3 Alarm unit
Function
The alarm unit triggers fault messages and alarms using binary outputs. The message
function is based on the change in the signal status:
●
If the signal status is "HIGH", there is no alarm message and the binary inputs are
conductive.
● If the signal status is "LOW", the module reports an alarm by shutting down binary
outputs using a high-resistance.
● Thanks to the dynamic control, this module can report the arising operational faults
automatically. Set parameters 44 to 51 to activate and parameterize the output of alarms
and fault messages.
Apart from binary outputs, the alarm unit has a double-acting binary input BE2. Depending
on the selected parameters, it is used to block the actuator or to move it to its end position.
Configure the suitable settings on parameter 43.
Device features
The alarm unit has the following features:
●
Available in two versions.
–
Explosion-proof version for connecting to a switching amplifier in conformity with
EN 60947-5-6.
– Non-explosion-proof version for connecting to power sources having a maximum of
35 V.
● Three binary outputs. Binary inputs are potentially separated from the standard controller
and from each other.
● The binary input has dual functionality. Both inputs are implemented as logical OR
combination.
–
Potentially separated for voltage level
– Not potentially separated for floating contacts
Figure 5-4 Alarm unit