For: 20/20 series
The USB RS485 Harness Kit with RS485/232 converter, used with Spectrex Host software, enables the user to connect to any available PC or laptop to re-configure settings or perform diagnostics on all 40/40 series flame detectors.
P/N 794079-3 for 20/20SH, SI, CTIx, MI, ML
P/N 794079-5 for 40/40 Series
P/N 794079-6 for 20/20SI SIL Series