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SDAIBB1300 Manual 3
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
Chapter 2: Connections
Power Supply Connections
A single SDAIBB board requires 8 mA at 10 to 30 VDC, and can be
brought directly into the board through terminal blocks or solder pads
marked POWER and GND or passed from another board connected to the
male side of the board. See Figure 1 for a system where the power is
brought directly onto the board. When passing power through from
another board, POWER is carried through on pin 2 and GND is carried
through on pin 7. Powers flows in on the male DB25 connector and out on
the female DB25 connector with a 0.5 VDC drop across the board. This
allows multiple boards to be powered with a single power supply by
cascading them. See Table 4 for a list of B&B data acquisition products
that carry power through on pins 2 and 7. Using these devices, you can
power an entire system with a single power supply as shown in Figure 2.
GAIN
JP4
Port Powered
RS-232
MODULE
I/O PORT
O ttaw a , Illin o is 61 35 0
DATA ACQUISITION
MODEL 232SDA10
JP9
JP10
R8
1
22.28/
USER
JP3
OUT
OFF
GND
IN+
IN-
OU T.
OFF.
2.5V
0V
POWER
GN D
OUT
OFF
GND
IN+
IN-
OU T.
OFF.
2.5V
0V
OUT
OFF
GND
IN+
IN-
22.28/U SE R
1
GAIN
JP11
OU T.
OFF.
2.5V
0V
JP2
JP6
R2
TB2
TB4
TB5
JP8
OUT
OFF
GND
IN+
IN-
OU T.
OFF.
2.5V
0V
JP5
A
B
TB1
C
D
TB3
JP7
Power Supply
GAIN
22.28/
USER
1
GAIN
1
22.28/
USER
R1
JP1
R7
Figure 1: Port Powered SDA and Powered Board