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Chapter 5—Input/Output Capabilities 63230-300-212
Solid-State KYZ Pulse Output April 2001
© 2001 Schneider Electric All Rights Reserved
78
The circuit monitor 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 relay to operate when an alarm condition is true.
For example, you could set up the three relays on the
IOC44 card to operate
at each occurrence of “Undervoltage Phase A.” Then, each time the alarm
condition occurs—that is, each time the setpoints and time delays assigned
to Undervoltage Phase A are satisfied—the circuit monitor automatically
operates relays R1, R2, and R3 according to their configured mode of
operation. See “Relay Output Operating Modes” on page 75 of this chapter
for a description of 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
“Undervoltage Phase B” assigned to it. The relay would operate whenever
either condition occurred.
NOTE: Setpoint-controlled relay operation can be used for some types of
non-time-critical relaying. For more information, see “Setpoint-Controlled
Relay Functions” on page 88 in
Chapter 6—Alarms
.
This section describes the pulse output capabilities of the circuit monitor. For
instructions on wiring the
KYZ pulse output, see “Wiring the Solid-State KYZ
Output” on page 55 in Chapter 5—Wiring of the installation manual.
The circuit monitor is equipped with one solid-state
KYZ pulse output located
near the option card slots. The IOC44 option card also has a solid-state KYZ
output. The solid-state relays provides the extremely long life—billions of
operations—required for pulse initiator applications.
The
KYZ output is a Form-C contact with a maximum rating of 96 mA.
Because most pulse initiator applications feed solid-state receivers with low
burdens, this 96 mA rating is adequate for most applications. For applications
where a higher rating is required, the
IOC44 card provides 3 relays with 10
ampere ratings. Use
SMS or the display to configure any of the 10 ampere
relays as a pulse initiator output. Keep in mind that the 10 ampere relays are
mechanical relays with limited life—10 million operations under no load;
100,000 under load.
To set the kilowatthour-per-pulse value, use SMS or the display. When setting
the kWh/pulse value, set the value based on a 3-wire pulse output. For
instructions on calculating the correct value, see “Calculating the
Kilowatthour-Per-Pulse Value” on page 80 in this chapter.
The circuit monitor can be used in 2-wire or 3-wire pulse initiator applications.
Each of these applications is described in the sections that follow.
The
KYZ pulse output can be configured to operate in one of 11 operating
modes. See “Relay Output Operating Modes” on page 75 for a description of
the modes.
The setup in
SMS or at the circuit monitor display is the same as a
mechanical relay. See the previous section “Mechanical Relay Outputs” on
page 77, for the values you must set up in
SMS.
Setpoint-controlled Relay Functions
SOLID-STATE KYZ PULSE OUTPUT