Load Status Indicator

LSI-55 IR

LSI-55 IR the Universal replacement for all the other modules.  The LSI-55 IR Supply and Load terminals are isolated from the rest of the unit. This feature allows the Supply and Load terminals to operate at an extended Voltage range of 0* to 1200 Volts AC or DC. This is a much wider and higher Supply Voltage range than the standard Load Status Indicator, LSI-55 or the LSI-55 R which operates from only 10 to 300 Volts AC or DC. In addition since the operating power is totally isolated from the Supply and Load, the isolated power can be any voltage from 10 to 300 Volts AC or DC that can supply 10 mA (see typical application below).

With only 5 terminals, 2 that are .250 quick fit male tabs for Supply and Load and 3 that are .110 quick fit male tabs for connecting to the remote Pilot Indicator LSI-55 P and the Data Module LSI-55 D, in addition to connecting to an isolated power source of  10 to 300 Volts AC or DC that can supply 10 mA (see typical application below).

A closer look at the circuit below will reveal some of the unique features of the LSI-55 IR  Load Status Indicator. With an  isolated power source of 10 to 300 Volts AC or DC present, the Load Status Indicator LSI-55 IR and the Remote Pilot Indicator LSI-55 P will illuminate Green,  indicating that isolated power is available. Note, the operation of LSI-55 IR differs from the standard LSI-55 and LSI-55 R only in that the LED will illuminate Green when power is available from the isolated power source, not when power is available to the Load. This is usually not a problem if the isolated power source Voltage is derived from the same system that the Load Voltage is derived. This way both the Load and the isolated source voltage are dependant on the same power system.

With the  Load Status Indicator, LSI-55 IR and the Remote Pilot Indicator LSI-55 P illuminating Green, power is available to operate the load and the switch can be placed in the on position to turn the lamp on. If all is OK with the lamp and the wiring to the lamp, the  Load Status Indicator, LSI-55 R and the Remote Pilot Indicator, LSI-55 P  will illuminate Red, indicating the load is active and that the lamp is drawing current (greater than 1.0 Amps). If the LSI remains in the Green state then one of two possibilities exist. The wire to the lamp is defective or the more probable cause, the lamp is "burned out".  In this example the load is a simple lamp, but a motor or heater or any type of electrical load that draw less than 30 Amps can be used.

* The lower operating Voltage value is limited only by the internal resistance of the sensing element of .002 Ohms and the 1Amp threshold. This equates to .002 Volts (2 mV) for the minimum operating Supply Voltage.

The Load Status Indicator Model, LSI-55 IR combines the features of both the LSI-55 I and the LSI-55 R into a signal unit. The LSI-55 IR uses an isolated Supply and Load in addition supports  the remote Pilot Indicator, LSI-55 P and the Data Module, LSI-55 D. The LSI-55 IR can be configured to replace  LSI-55, LSI-55 R and the LSI-55 I (see application notes AN- 551006),   making   the

Typical Application For the LSI-55 IR

Specification For LSI-55 IR:

Supply Voltage Vs2mVto 1200 Volts AC* or DC  *50 to 400 cycle

Operating Voltage        Vo10 to 300 Volts AC* or DC*50 to 400 cycle

Supply Current Is 30 Amps Max

Operational Current     Io       10 mA (.01 Amps)

Load Current Active     IL1.0 AmpsIL > 1.0 Amps Led Red

Load Current Inactive  IL0.8 AmpsIL < 0.8 Amps LED Green

Connections PowerMale .250" Quick Connects10 AWG

  Signal     Male .110" Quick Connects      22 - 18 AWG

LED's  Readable in direct sun light.

Temperature        -40 C to 85 C

Size       .5" Diameter x 2.2" Long

Panel Thickness      .5"

Panel Nut    .750" Diameter x .175" Thickness

                                                       15/32"-32 Thread

RoHS Compliant                              Yes