Schneider Electric PM820, PM870, PM810, PM850 manual Input/Output Capabilities, Digital Inputs

63230-500-225A2	PowerLogicTM Series 800 Power Meter
3/2011	Chapter 5—Input/Output Capabilities

Chapter 5—Input/Output Capabilities

Digital Inputs

The power meter includes one solid-state digital input. 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 digital input can also be associated with an external relay. You can log digital input transitions as events in the power meter’s on-board alarm log. The event is date and time stamped with resolution to the second. The power meter counts OFF-to-ON transitions for each input. You can view the count for each input using the Digital Inputs screen, and you can reset this value using the command interface. Figure 5–1is an example of the Digital Inputs screen.

Figure 5–1: Digital Inputs Screen

A.Lit bargraph indicates that the input is ON. For analog inputs or outputs, the bargraph indicates the output percentage.

B.SI is common to all meters and represents standard digital input.

C.A-S1 and A-S2 represent I/O point numbers on the first (A) module.

D.Use the arrow buttons to scroll through the remaining I/O points. Point numbers beginning with “B” are on the second module.

 A





 B







 C





		D 
PLSD110233

The digital input has three operating modes:

•Normal—Use the normal mode for simple on/off digital inputs. In normal mode, digital inputs can be used to count KY pulses for demand and energy calculation.

•Demand Interval Synch Pulse—you can configure any digital input to accept a demand synch pulse from a utility demand meter (see “Demand Synch Pulse Input” on page 40 of this chapter for more about this topic). For each demand profile, you can designate only one input as a demand synch input.

•Conditional Energy Control—you can configure one digital input to control conditional energy (see “Reactive energy accumulates in four quadrants” on page 36 in Chapter 4—Metering Capabilities for more about conditional energy).

NOTE: By default, the digital input is named DIG IN S02 and is set up for normal mode.

For custom setup, use PowerLogic software to define the name and operating mode of the digital input. The name is a 16-character label that identifies the digital input. The operating mode is one of those listed above.

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