DBK2424-Channel Optically Isolated Digital-Output ModuleFeatures• Provides 24 isolated digital outputs• Optically isolated outputs up to 60 VDC• 500V channel-to-channel isolation• 500V channel-to-system isolation• Expandable to 192 digital lines
The DBK24 is a 24-line digital-output
module that provides isolated digital outputs for IOtech’s data acquisition systems.
The DBK24 provides 500V of channel-tochannel and 500V of ­channel-to-system
optical isolation for complete system
protection. This isolation protects thedata acquisition system from damage
caused by accidental contact with highexternal ­voltages and eliminates troublesome ground loops. Up to eight DBK24
modules can be connected to one system
for a total of 192 digital outputs.
Applications. The DBK24 is ideal for use incontrol applications. The unit can switch
up to 60 VDC and is capable of operating
devices such as solenoids, lamps, heaters,
and motor controls.

The DBK24 adds 24 isolated digital outputs to the LogBook, DaqBook, DaqBoard/2000
Series, and DaqScan

DBK24 Optically Isolated Digital-Output Module Block Diagram

Connections. The DBK24 connects to asystem’s P2 digital I/O connectors anduses the existing digital I/O lines as acommunications bus. Thus, the lines ona system’s digital I/O connectors are notuser accessible when a DBK24 is in use.
The DBK24 can be daisy-chained withother DBK digital I/O cards or modules
via optional expansion cables. Signal connections to the DBK24 are made via screw
terminals, which are conveniently locatedon its slide-out PC board.

P22Control

6Address

8DataHiOPTO
isolator
Digitalinterface tosystemLoOutput 24OpenCollector
OutputHiOPTOisolatorLoOutput 1VccHiLoPower-On-Reset. The module features apower-on-reset function, allowing users
to set the outputs to either on or off prior
to start-up. Each power-up output state isdetermined by dip-switch settings prior to
the first write command to the module.

Typical of 24

Power. The DBK24 is equipped with aninternal power supply and external ACadapter. It can also be powered from aDBK30A battery module, a 12V car battery,or from any 9 to 24 VDC source.

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DBK24

Specifications & Ordering Information
Specifications

24 optically isolated digital-output channels programmable in 8-bit groups
Connector: DB37 male, mates with P2*; screw terminals for signal outputs
Output Channel Ratings
Maximum Current/Channel: 1AVoltage Drop @ 1A and 25 ˚C: 1V
Maximum Open Circuit Voltage: 60 VDC
Off-State Leakage: 10 µA
Module Power Requirements: 1.5W; AC adapter
included
120 VAC Adapter Supplied: 15 VDC @ 0.9A
Indicators: Local power and system power LED
Controls: Power on/off
Power-On-Reset State: Following power-up, the stateof each output is determined by dip-switch settingsprior to first write command to the module
Isolation Voltage
Channel-to-Channel: 500V
Channel-to-System: 500V
Channel Address: Set by dip-switch
Maximum Module Power Dissipation:@ 25 ˚C
12W@ 50 ˚C
6W
Dimensions:  285 mm W x 221 mm D x 35 mm H
(11” x 8.5” x 1.375”)
Weight: 1.3 kg empty (3 lbs)
Power Consumption:  10 mW

Ordering Information
Description
24-channel optically isolated
digital-output module

Product Compatibility
Part No.
DBK24Accessories & Cables
Rack mount kit
Molded T expansion cable; 2 in.
Molded T expansion cable; 4 in.
Ribbon cable, where x is the numberof DBK devices attached✔ LogBook✔ DaqBook✔ DaqLab✔ DaqScan✔ DaqBoard/2000 Series

RackDBK2CA-255-2T
CA-255-4T
CA-37-x

Note: The CA-37-x ribbon cable can also be usedin lieu of the CA-255-x molded T cables.

* Attachment to the DaqBoard/2000 Series requires a DBK202, DBK203A, DBK209, DBK213, or DBK214

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