NORTHROP GRUMMAN T6MC, User Documentation

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Park Air T6MC Controller Page iv
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Modifications
Modifications (Build State) to the Park Air T6MC controller are listed below.
Modification
State
Date Detail
Applicable
Park Air
Change Notice
1 5 April 2001 RLB added to allow both 2-wire and 4-wire working -
2 6 October 2003 Change to comply with the requirements of CAN
CSA22.2 UL 60950 4456b
4460a
3 28 November 2003 Compliance with Canadian telecommunications
standards 4493
4 8 February 2007 Add 1 nF chip capacitor between pins 6 and 7 of
IC4. Spray inside enclosure with EMC paint. To
improve EMC performance from mobile phones 4757
5 17 September 2012 Replace V1 (VDR) to comply with safety standard
EN60950 6029
6 16 November 2015 Replace R18 27k with 24k 6235