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Table B-1 lists the electrical, mechanical, and environmental specifications for the Proto-
typing Board.
Table B-1. RCM30/31/32XX Prototyping Board Specifications
Parameter
Board Size
Operating Temperature
Humidity
Input Voltage
Maximum Current Draw
Specification
5.30" × 6.775" × 1.00" (135 mm × 172 mm × 25 mm)
–20°C to +60°C
5% to 95%, noncondensing
8 V to 24 V DC
800 mA max. for +3.3 V supply,
(including user-added circuits) 1 A total +3.3 V and +5 V combined
Prototyping Area
Standoffs/Spacers
2.0" × 3.5" (50 mm × 90 mm) throughhole, 0.1" spacing,
additional space for SMT components
5, accept 4-40 × 3/8 screws
B.3 Power Supply
The RCM3000 requires a regulated 3.3 V ± 0.15 V DC power source to operate. Depend-
ing on the amount of current required by the application, different regulators can be used
to supply this voltage.
The Prototyping Board has an onboard +5 V switching power regulator from which a
+3.3 V linear regulator draws its supply. Thus both +5 V and +3.3 V are available on the
Prototyping Board.
The Prototyping Board itself is protected against reverse polarity by a Shottky diode at D2
as shown in Figure B-3.
J9/J11
SWITCHING POWER REGULATOR
+5 V
LINEAR POWER
REGULATOR +3.3 V
+RAW
1
2
3
D2
DL4003
DCIN
C17
47 μF
U5
LM2575
330 μH
L1
D1
1N5819
340 μF
3
LM1117
U1
1
2
10 μF
Figure B-3. Prototyping Board Power Supply
66
RabbitCore RCM3000
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