Chapter 5—Input/Output Capabilities 63230-300-212
Solid-State KYZ Pulse Output April 2001
©200 1 Schneider Electric All Rights Reserved
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The circuitmonitor can detect over 100 alarm conditions, including over/
under conditions,digital input changes, phase unbalance conditions,and
more (see Chapter 6—Alarms on page 83 for more about alarms).Using
SMS, you can configure a relayto operate when an alarm condition is true.
Forexample, you could set up the three relays on the IOC44 card to operate
at each occurrenceof “Undervoltage Phase A.”Then, each time the alarm
conditionoccurs—that is, each time the setpoints and time delaysassigned
to UndervoltagePhase A are satisfied—the circuit monitor automatically
operatesrelays R1, R2, and R3 according to their configured mode of
operation.See “Relay Output Operating Modes”on page 75 of this chapter
for a descriptionof the operating modes.
Also,you can assign multiple alarm conditions to a relay.For example, relay
AR1 on the IOC-44 card could have“Undervoltage Phase A”and
“UndervoltagePhase B”assigned to it. The relay would operate whenever
either conditionoccurred.

NOTE:Setpoint-controlled relay operation can be used for some typesof

non-time-criticalrelaying. For more information, see“Setpoint-Controlled

Relay Functions”onpage 88 in

Chapter 6—Alarms

.

Thissection describes the pulse output capabilitiesof the circuit monitor. For
instructionson wiring the KYZ pulse output, see “Wiring the Solid-State KYZ
Output”on page 55 inChapter 5—Wiring of the installation manual.
Thecircuit monitor is equipped with one solid-state KYZ pulse output located
nearthe option card slots. The IOC44 optioncard also has a solid-state KYZ
output. Thesolid-state relays provides the extremelylong life—billions o f
operations—requiredfor pulse initiator applications.
The KYZ output is a Form-C contact with a maximum ratingof 96 mA.
Becausem ostpulse initiator applications feed solid-statereceivers with low
burdens,this 96 mA rating is adequatefor most applications. Forapplications
where a higher ratingis required, the IOC44 card provides 3 relays with 10
ampere ratings. U se SMS or the displayto configure any of the 10 ampere
relaysas a pulse initiator output. Keepin mind that the 10 ampere relays are
mechanicalrelays with limited life—10 million operations under no load;
100,000under load.
Tosett he kilowatthour-per-pulsevalue,use SMS or the display.When setting
the kWh/pulsevalue, set the value based on a 3-wire pulse output. For
instructionson calculating the correct value, see “Calculating the
Kilowatthour-Per-PulseValue”on page 80 inthis chapter.
Thecircuit monitor can be used in 2-wire or 3-wire pulse initiatorapplications.
Each of these applicationsis described in the sections that follow.
The KYZ pulse output can be configuredto operate in one of 11 operating
modes.See “Relay Output Operating Modes”on page 75 for a desc ription of
the modes.
The setupin SMS or at the circuit monitor display is the same as a
mechanicalrelay. See the previous section “Mechanical RelayOutputs”on
page 77, forthe values you must set up in SMS.
Setpoint-controlledRelay Functions
SOLID-STATE KYZ PULSEOUTPUT