Omega Engineering OMB-DBK-34A, User Manual

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Power supplied to the DBK23 powers the on-board regulator. Connect the power supply (AC adapter) to
the 5-pin DIN (labeled POWER IN) located on the front panel of the DBK23 chassis. Note the two power
indicators on the rear panel of the DBK23. Check that both SYSTEM and LOCAL power LEDs are on at
all times during operation. The second 5-pin DIN connector (labeled POWER OUT) can be cascaded to
another accessory. A single power source can supply multiple DBK23 units.
CAUTION
Excessive power consumption can cause equipment damage. Calculate system power
requirements prior to daisy-chaining.
Hardware Setup
Card Connection
Open the DBK23 case by loosening the two retaining screws on the chassis front
panel. Slide out the DBK23 board in order to connect wires to terminal blocks.
Each input channel (or bit) is equipped with a discrete two-pole screw terminal
block for isolated HI and LOW termination. The terminals accept 12 AWG to
22 AWG wire. Insulated wire types selected should meet or exceed 500 V
isolation specifications.
Strip insulation from the ends of wires (no more than 1/4"). Insert wire into the screw terminal receptacle
so that only the bare portion of wire extends into the opening. Bare wire should not extend more than
1/16" beyond the receptacle. These steps are essential to maintaining proper voltage isolation. Once the
wire ends are in place, turn the slot head screw at the top of the block until the receptacle grips the wire
firmly. Do not over tighten. Captive holes have been placed in appropriate locations to secure groups of
wires to the board. Nylon lock ties (not included) work well for this purpose.
DBK23, pg. 2
879795
DBK Option Cards and Modules