IRIS Honeywell S556B Flame Viewing Head

Core Performance & Industrial Application

The IRIS S556B is an infrared flame scanning viewing head of the S55XX flame monitoring series.

It senses the infrared radiation of the burner flame and transmits signal data to the matching IRIS signal processor for flame presence verification.

It works with P520, P522, P531 and P532 signal processors to form a complete flame monitoring system.

It offers adjustable IR gain and selectable IR filter frequency bands, with settings stored in EEPROM and restored automatically on power-up.

It features fail-safe logic: sensor saturation or fault triggers No-Flame indication and de-energizes the flame relay.

It is widely used as spare replacement for boiler, furnace and process burner flame safeguard systems.

Technical Specifications

▶ Product type: Infrared flame viewing head

▶ Brand: IRIS (Honeywell)

▶ Model: S556B

▶ Detector: IR solid-state sensor

▶ Compatible processor: P520, P522 DC/AC, P531, P532

▶ Adjustable: IR gain 0-699, IR filter frequency selection

▶ Setting storage: EEPROM parameter retention

▶ Protection: Fail-safe No-Flame on fault / saturation

▶ Mounting: Sight-pipe flange mounting with purge air connection

▶ Feature: Front two-line pulse count readout, remote parameter setup from processor

▶ Note: Supply voltage, response band and cable length defined by processor configuration; confirm on nameplate

Industry Applications

Applied in industrial boilers, furnaces, process heaters and burner management flame scanner spare replacement.

Note: Confirm processor compatibility, sight-pipe length and purge air requirement before ordering