Overview
This article discusses the discrepancy between documented poll rates on an ITS-DX4020-G.
Issue
The Bosch Cellular Service User Guide states that for Fire applications we should go with a Poll rate of 240 Ack wait of 10. the current ITSDX4020-G O/I guide says Poll at 60 Ack wait 13. Which is correct?
Solution
240 seconds with 10 second retries is correct for the current NFPA72 regulations for Fire. This used to be 60 seconds in the old NFPA72 standard.
Issue
The Timer Test is not coming in. The panel history shows Off Normal Test. The panel is programmed to send all reports in CID. Central does not see an E608 CID report for an off normal test.
Solution
Contact ID Reporting. The system can be programmed to send a periodic test report, E602, in Contact ID format. If any system troubles are present at the periodic test time, a new event, E608, which states “New event, off normal at time of periodic test report” is sent. Software versions 2.03 and before sent a generic system trouble P300 report.
Part numbers DS9400, DS9400I, DS9400M, DS9431, D7024
High Voltage (HVLT) Green - Warns of dangerous voltages when lit. Output Active (OUT) Red - Indicates that one of the NACs (1 to 4) is active. NAC Short (SHRT) Yellow - Indicates that there is a short on one of the four NAC outputs. Low Battery (LBAT) Yellow - Indicates that there is a missing or dead battery. AC OK (ACOK) Green - Indicates that the input is good and that the power supply is running from the AC line. Ground Fault (GFLT) Yellow - Indicates that the NAC output wiring has been improperly connected to an external source or ground. Loop Trouble (TBL) Yellow - Indicates that one, or both, NAC Input EOL device(s) has disconnected due to one or more of the following faults: Faulty AC power (after a delay) Low battery fault Ground fault NAC output fault EOL shorted EOL open NAC overcurrent Power supply over voltage condition
This is a generic solution for any photoelectric device application where the device seems to keep going in and out of trouble due to alignment issues.
Part numbers DS240, DS241, D296, D297