Pulse Isolation Relay

RPR-903PS

The SSI RPR-903PS is a single-input, triple-output pulse isolation relay that provides three isolated solid state Form C (KYZ) contacts from a field-selectable Form A or C input. Two outputs are fixed Form C, while the third is field-selectable and features a Pulse Doubling mode for Form C to Form A pulse value conversion.

Designed for utility metering and energy management applications, the RPR-903PS filters noise and transients at its input to prevent false pulses across all three outputs. Its output flexibility makes it a versatile choice wherever a single metering pulse source needs to serve multiple downstream systems with differing signal requirements.

The RPR-903PS Pulse Isolation Relay on a white background.

Product Highlights

The RPR-903PS sets itself apart with its field-selectable third output, which can be configured for Normal mode — mirroring the input pulse directly — or Pulse Doubling mode, which converts a Form C input into a true Form A pulse value output. This built-in conversion capability eliminates the need for additional signal conditioning equipment and gives installers greater flexibility when interfacing with equipment that requires different pulse formats.

Reliability and protection are standard throughout. Solid state switches rated at 800V and 750mA, combined with built-in transient suppression, safeguard all three output channels from lightning and voltage spikes without requiring external protection devices. Fused “K” output leads, red and green LED status indicators, and a “Euro” type terminal strip make the RPR-903PS easy to install and maintain across metering, SCADA, and demand recording installations.

Features

The RPR-903PS delivers advanced output flexibility from a single metering input, purpose-built for installations with mixed pulse format requirements:
  • Three isolated solid state Form C (KYZ) outputs from a single Form A or C input
  • Two fixed Form C outputs plus one field-selectable Form A or C output
  • Pulse Doubling mode for true Form C to Form A pulse value conversion
  • Input noise and transient filtering on each channel to eliminate false pulses
  • Solid state switch rated at 800V / 750mA with built-in transient protection
  • Fused "K" output leads (½ amp, 3AG) on each channel
  • 2,500Vrms input/output isolation voltage
  • Red and green LED status indicators
  • Available in 24 VAC/VDC and 125 VDC input voltage options
The RPR-903PS Pulse Isolation Relay

Single-Input Triple-Output Pulse Relay

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