30
The 6911 Keypad
Technical Specifications
Liquid-Crystal Display
Resolution
128 x 64 pixels
Backlighting
On state brightness adjustable from 30% at setting "1" to 100% at setting "9". 0 = OFF.
EEPROM Memory
Size 8Kbytes
Function
Storage of one 690 or one 590 configuration.
Power Management
Supply Voltage
5V dc (from RS232 port connection)
Current Consumption
100mA typical (0.5W)
MMI Hot-Pluggable
Yes
Real-time Clock
Time Accuracy
Losing or gaining < 1 minute every 25 days @ 25
°
C, < 1 minute every 17 days @ 0
°
C - 50
°
C
De-Powered Time
Back-Up
Provided by a lithium manganese dioxide cell, 3.0V 15mAhr. Trickle charged during periods
of MMI power-up.
Time Back-Up Duration
> 6 months de-powered.
Time Back-Up
MMI Power-Up Duty
> 1% of time powered-up, for continuous RTC operation (i.e. equivalent to MMI powered-up
for more than 1hr in every 4 days, or 2 days in every 6 months)
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