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DBK207 and DBK207/CJC, pg. 4
987594 DBK Option Cards and Modules
Power
The DBK207 and DBK207/CJC require +5 VDC from a regulated DC power supply. External power
attaches to the DBK207 [DBK207/CJC] via on-board screw terminal connections.
Power Requirements:
Voltage: +5 V regulated DC
Current: Dependent upon 5B Models used.
• SC-5B38 series modules each require 200 mA.
• SC-5B43 series modules require up to 200 mA.
• All other analog input 5B modules require 30 mA, unless otherwise specified.
On-Board Power Connections for +5 Volts
CAUTION
External power supplied to DBK207 or DBK207/CJC must not exceed +5 VDC.
Neither DBK207 nor DBK207/CJC regulate the external power input.
External Ground Connection
For optimum 5B module operation, the 5B must have one [and only one] earth ground. Accordingly, the
DBK207 [DBK207/CJC] must be configured to provide its earth ground, if such a ground is not present on
the power supply.
JP2 Shown in OPEN Default
If the 5 VDC power supply provides output that is isolated from earth ground, then the jumper on JP2
should be placed in the CONN position. This will tie the 5V return on the power supply to the DBK207
[DBK207/CJC] ground system.
If the 5 VDC power supply is already referenced to earth ground, then the JP2 jumper should be placed to
OPEN. This will prevent multiple earth ground connections and the resultant ground loop. Note that the
OPEN position is JP2’s default setting.
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