4003_5001_D02
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A separate 2 pin terminal block (EXT+ & EXT-) is provided to connect external voltage to the
heater. The heater has a maximum applied supply voltage of 26V although typically 24V should
be applied.
The power dissipation (Pd) stated on the marking label can be taken as the power rating of the
heater element. Reference should be made to Section 9 SAFETY INSTRUCTIONS for applicable
ambient temperature limits for when power is applied to the heater.
The required current supply necessary to power the heater can be calculated from this power
and the applied voltage I = P/V. Typically a <5W heater is fitted so current = 5/24 = 0.2A. A
supply capable of providing at least this current will be necessary to operate the heater correctly.
4.12.
RTC BACKUP
The unit includes RTC backup to retain the date & time.
If the unit is turned off but the main batteries or the external power is left connected, then
memory backup will retain these settings indefinitely.
If the unit is turned off and the main batteries and
external power are removed, then memory backup
will retain these settings for a minimum of 50 days.
If memory backup expires then the warning
message shown opposite will be displayed when the
units is next turned on. The date and time must be set as per Section 4.5.5 DATE and Section
4.5.6 TIME.
DATE & TIME
ERROR MESSAGE
Summary of Contents for 4003 MAGSIG
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