Meggitt vibro-meter SpeedSys300 ODS301, Руководство пользователя

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USER MANUAL Document reference MAODS301/E
SpeedSys300 ODS301 overspeed detection system Edition 4 - May 2022
3 - 12
Installation considerations
INSTALLATION OF A SPEEDSYS300 ODS301
Figure 3-5 provides an example of how to hardwire safety relay 1 of two SpeedSys300
ODS301 modules to obtain a 2oo2 voting logic structure.
Because a SpeedSys300 ODS301 module’s safety relays – relay 1 and relay 2 – are
double-pole single-throw (DPST) relays, there are several ways in which two modules can be
hardwired in parallel to obtain a 2oo2 voting logic structure.
Table 3-7 and Table 3-8 illustrate the two different ways in which a 2oo2 voting logic structure
can be implemented using the safety relay 1 of two SpeedSys300 ODS301 modules.
Table 3-7: 2oo2 – using safety relay 1 of SpeedSys300 ODS301 modules (1)
SpeedSys300 ODS301
modules
2oo2 to customer
#1 #2
B17 ↔ B17 ↔ 2oo2 connection to customer circuit
B18 ↔ B18 ↔ 2oo2 connection to customer circuit
Table 3-8: 2oo2 – using safety relay 1 of SpeedSys300 ODS301 modules (2)
SpeedSys300 ODS301
modules
2oo2 to customer
#1 #2
B19 ↔ B19 ↔ 2oo2 connection to customer circuit
B20 ↔ B20 ↔ 2oo2 connection to customer circuit
Figure 3-5: 2oo2 – example using safety relay 1 of SpeedSys300 ODS301 modules