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Glossary
Rail intersection
The rail intersection separates the → RAIL contact conductors electrically at the → plant
segment transition.
Rail system
The total of all → EMS rails of an → EMS.
S data
Data that is sent the interface from the → PSB-S module over the → RAIL interface. The S
data sent can be both acknowledged and unacknowledged data.
SELV
Safety extra-low voltage in accordance with the SELV standard for the protection against
electrical shock.
Standby bit
The standby bit is mapped to the PII of the carrier controller.
The standby bit is set in the → EMS carrier if the → enable bit is not set in the plant segment
controller; the corresponding communication link is free of error in this case. However, no →
user data is transmitted.
Synchronization signal
The synchronization signal serves to ensure synchronous data transmission from all → plant
segment controllers to the → EMS carriers. The synchronization signal is generated by a
plant segment controller and transmitted simultaneously to all → plant segment controllers of
the → EMS.
User data
User data are data and messages transferred between a → plant segment controller and a →
carrier controller. User data can be acknowledged or unacknowledged data. User data are a
subset of → S and C data. User data → can be sent with each → data subframe.
Validation bit
The validation bit is mapped to the PII and PIO of the plant segment controller and carrier
controller.
The validation bit identifies valid transmitted and received data.
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Operating Instructions, 09/2013, A5E03474162-02
Carrier controller
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