Meggitt vibro-meter SpeedSys300 ODS301, Руководство пользователя

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Document reference MAODS301/E USER MANUAL
Edition 4 - May 2022 SpeedSys300 ODS301 overspeed detection system
3 - 13
Installation considerations
INSTALLATION OF A SPEEDSYS300 ODS301
Table 3-9 and Table 3-10 illustrate the two different ways in which a 2oo2 voting logic
structure can be implemented using the safety relay 2 of two SpeedSys300 ODS301
modules.
3.2.5.3 2oo3 voting
With a 2oo3 voting logic structure, three devices/relays are connected in combination such
that a 2oo3 signal is given if two out of three devices switch their relays (see
Figure 3-6 ).
Table 3-9: 2oo2 – using safety relay 2 of SpeedSys300 ODS301 modules (1)
SpeedSys300 ODS301
modules
2oo2 to customer
#1 #2
B21 ↔ B21 ↔ 2oo2 connection to customer circuit
B22 ↔ B22 ↔ 2oo2 connection to customer circuit
Table 3-10: 2oo2 – using safety relay 2 of SpeedSys300 ODS301 modules (2)
SpeedSys300 ODS301
modules
2oo2 to customer
#1 #2
B23 ↔ B23 ↔ 2oo2 connection to customer circuit
B24 ↔ B24 ↔ 2oo2 connection to customer circuit
Figure 3-6: 2oo3 voting – relay connections
2oo3
Module #1
Relay A
Module #2
Relay B
Module #2
Relay B
Module #3
Relay C
Module #3
Relay C
Module #1
Relay A