B&B Electronics 4 Channel Input Buffer Board SDAIBB - Manual (Page 5)

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.
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Figure 1: Port Powered SDA and Powered Board