Section 2
1MRK 511 434-UEN A
SAM600 Process Bus I/O System
12
SAM600 Process Bus I/O System
Operation Manual
When installed in the same kiosk, a SAM600 system bus is typically realized
through 100BASE-TX ports. When installed in different compartments in the field,
the system bus through which SAM600 modules communicate with each other
must be realized by 100BASE-FX ports.
Binary inputs for process supervision
Binary inputs on SAM600 modules are used for secondary system supervision. The
inputs are pre-assigned with test switch indication (SAM600-VT and SAM600-CT)
and fuse failure indication (SAM600-VT only). Information acquired through these
inputs is reflected in the quality information in the IEC/UCA 61850-9-2LE
streams.
The polarity and the input level of the binary inputs are configurable. If the binary
inputs of a SAM600 module are not connected, their input processing can be
disabled in the Parameter Setting Tool of PCM600.
Neutral behavior
The IEC/UCA 61850-9-2LE telegram definition contains a fourth measurement for
both currents and voltages. Depending on the primary equipment and user
requirements, SAM600 modules can be configured individually on how the fourth
measurement is acquired. Both, measurements of the primary value and summation
of measured phases are available. The quality information in the IEC/UCA 61850-
9-2LE stream will reflect the setting.
Time synchronization
Analog samples are time synchronized in order to provide the phase accuracy
required by IEC 61869-9. Synchronization of a SAM600 system with IEDs is
achieved by IEEE 1588 (profile IEC 61580-9-3) or through a 1PPS signal.
Internally, a SAM600 system always synchronizes using IEEE 1588.
The following synchronization methods are supported:
Synchronization by IEEE 1588
– Access points of a SAM600 system can
synchronize against an external IEEE 1588 master clock with an accuracy of
1μs in order to ensure synchronous sampling.
Free-running
– A SAM600 system can operate in a free-running mode with no
external time synchronization. The SAM600 system itself synchronizes
internally by means of IEEE 1588 in order to ensure synchronous sampling of
the analog data.
Synchronization by 1PPS
– A pulse per second (1PPS) from an external clock
is used to synchronize a SAM600 system through SAM600-TS module with an
accuracy of 1μs in order to ensure synchronous sampling.
For details about supported time synchronization configurations, see
Section