Overview
Manuals
Optical Path
Receiver Output
Installation & Alignment
Features:
- Short-range Searchline Excel infrared receiver for a 5 to 40 m optical path.
- ATEX standard/source receiver execution identified by part number 2104B2111.
- 4 to 20 mA receiver output with documented system diagnostics and RS-485 capability.
2104B2111 is the receiving element of a paired Searchline Excel open-path infrared flammable-gas detector. It measures the infrared signal transmitted across the protected path and provides the system output used by the receiving controller. The installed transmitter, path length, gas calibration, source-loop wiring and hazardous-area certification must remain compatible.
Before removal, record the complete label, certification, paired transmitter, bracket position, path length, cable entries, terminal wiring, loop polarity, alignment readings and alarm configuration. After installation, align the optical path, verify stable signal strength, prove output and fault states, then perform the approved gas-response and alarm test.
The Honeywell 2104B2111 RX SHORT Short Range Gas Receiver is listed as Obsolete / Discontinued by OEM. Current revision, availability and supplied scope are confirmed in the written quotation.
Honeywell Searchline Excel Industrial Gas Detection Product Guide, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The 2104B2111 receiver belongs to the short-range Searchline Excel execution with a documented optical path of 5 to 40 m. The paired transmitter and receiver must be mounted on the approved brackets with a clear line of sight and the alignment maintained within the system limits.
Record the existing bracket position and alignment readings before removal. After replacement, complete coarse and fine alignment and verify stable signal strength before performing gas-response tests.
The receiver is used with a source 4 to 20 mA output execution and the Searchline Excel system supports RS-485 Modbus communications. Confirm loop polarity, maximum loop resistance, receiving-channel scaling, fault-current behavior and any serial settings from the installed design.
Do not commission the channel from a normal current reading alone. Prove normal, fault and gas-response states at the controller and verify the configured alarm and shutdown actions.
Confirm hazardous-area isolation, cable-entry sealing, earth bonding, bracket condition and optical-window cleanliness before installation. Match the exact ATEX receiver execution and use the approved alignment procedure with the correct short-range transmitter.
After alignment, allow the detector to stabilize, record signal strength and prove the complete detection loop using the approved Searchline Excel test equipment and site gas-detection procedure.
