Honeywell Searchline Excel Open-Path - 4.5 ELECTRICAL INSTALLATION

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MAN0530 Issue 09 October 03 Searchline Excel
2104M0506
4. CROSS-DUCT EXCEL
4.5 ELECTRICAL INSTALLATION
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CENELEC
TX/RX Configuration
UL TX/RX Configuration
4.5.1 Electrical Installation – Precautions and Recommendations
Consult the recommendations for the Open-Path Excel in section 3.3.1 as they also apply to
the Cross-Duct Excel.
Because the Transmitter and Receiver operate from a common supply, the field cabling
requirements are different:
For Cross-Duct Excel, the field cabling conductors should have sufficient cross sectional area
to ensure that the minimum supply voltage applied to the gas detector is 18V at a current of
720mA. This corresponds to a maximum round loop impedance of 8.3 ohms for a nominal 24V
system supply.
CSA/FM/UL TX/RX Configuration