Schneider Electric PowerLogic PM5300 Series Dokumentacja Pobierz pdf (Strona 25)

63230-507-201 Power Meter 750

03/2007 Section 5—Input/Output Capabilities

SECTION 5— INPUT/OUTPUT CAPABILITIES

DIGITAL INPUTS The power meter can accept two digital inputs designated as S1 and S2. A

digital input is used to detect digital signals. For example, the digital input

can be used to determine circuit breaker status, count pulses, or count

motor starts.

The power meter counts OFF-to-ON transitions for each input, and you can

reset this value using the command interface or by performing a METER

reset under MAINT. Figure 5– 1 shows the status of the I/O function for the

PM750.

The digital input has two operating modes:

• Normal—Use the normal mode for simple ON/OFF digital inputs.

• Demand Interval Synch Pulse—Use this mode to configure a digital

input to accept a demand synch pulse from a utility demand meter.

The digital inputs can also be configured to activate an alarm when

changing status; for example, from OFF to ON. See Alarms on page 27.

Demand Synch Pulse Input You can configure the power meter to accept a demand synch pulse from

an external source such as another demand meter. By accepting demand

synch pulses through a digital input, the power meter can make its power

demand interval “window” match the other meter’s demand interval

“window.” The power meter does this by “watching” the digital input for a

pulse from the other demand meter. When it sees a pulse (an off-to-on

transition of the digital input), it starts a new demand interval and calculates

the demand for the preceding interval. The power meter then uses the same

time interval as the other meter for each demand calculation. Figure 5– 2

illustrates this point.

When in demand synch pulse operating mode, the power meter will not end

a demand interval without a pulse. Either digital input can be set to accept a

demand synch pulse. However, only one of them should be configured that

way at a time.

Figure 5– 1:I/O Status Screen

A. Lit bar graph indicates that the

input or output is ON.

B. S1 and S2 represent the two

digital inputs.

C. DO represents the digital output.

!,!2- -!).4

)/34!453





\\\\\\\\\



R

\\\\\\\\\



1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 67 68

Komentarze do niniejszej Instrukcji

Brak uwag

Schneider Electric PowerLogic PM5300 Series Dokumentacja Strona 25

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Pomiary, testowanie i kontrola Schneider Electric PowerLogic PM5300 Series