101-0506 Rabbit Semiconductor, 101-0506 Datasheet - Page 166

• Manufacturer Part Number: 101-0506
• Description: CARD CPU SR9160 128K SRAM SMRTST
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0506

• Accessory Type: Smart Star CPU Card
• For Use With/related Products: SR9160
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

C.1 Current Requirements
Remember to take the current draw of the various I/O cards into consideration when
selecting the power supply for your Smart Star control system.
Table C-1 lists the typical current consumption for the CPU Card and the I/O cards.
C.2 Batteries and External Battery Connections
An onboard 265 mA·h lithium coin cell on the CPU Card provides power to the real-time
clock and SRAM when external power is removed from the Smart Star control system.
This allows the CPU Card to continue to keep track of time and preserves the SRAM
memory contents while the power is off.
The drain on the battery is typically less than 20 µA when there is no external power
applied. The battery can last
The drain on the battery is typically less than 4 µA when external power is applied. The
battery can last for
Since the shelf life of the battery is 10 years, the battery can last for most of its shelf life
when external power is applied most of the time.
166
Table C-1. Current Consumption of I/O Cards Attached to Smart Star Backplane
Digital I/O (SR9200 series)
A/D Converter (SR9300
series)
D/A Converter (SR9400
series)
Relay (SR9500 series)
CPU Card
* Maximum current 2.0 A per I/O card, 7.0 A for Smart Star system
I/O Cards
265 mA·h
----------------------- -
265 mA·h
----------------------- -
10 µA
4 µA
+5 V Supply
190 mA
65 mA
40 mA
10 mA
=
=
Current Consumption
3.0 years.
7.5 years.
up to 200 mA/output
+V_USER Supply
35 mA
75 mA
—
Smart Star (SR9000)
*