DBK42

16-Slot Multi-Purpose Isolated Signal Conditioning
Features• Accepts any combination of up tosixteen 5B isolated input signal conditioning modules• Optional screw-terminal connection
block includes cold-junction sensors
for thermocouple applications• Features rugged all-metal construction
for portable applications• Includes a built-in power supply, operable from 10 to 24 VDC
The DBK42 sixteen-slot 5B signal conditioning module allows IOtech’s dataacquisition syste­­ms to accommodate any
combination of up to sixteen 5B input
signal conditioning modules*. Each userinstallable signal conditioning module
offers 500V isolation from the system andfrom other channels. It is available witha wide variety of modules that accommodate an array of signals — from low-level­thermocouple signals to strain gage signals.
A single cable connects the DBK42’s output
to the P1 analog input connector. Onesystem can support up to 16 DBK42 units,providing a total of 256 isolated analog
input channels. The A/D scans the DBK42’schannels at the same 5 or 10 µs/channel
rate that they scan all DBK Series analog­expansion and signal ­conditioning cards.
Powering the DBK42. The DBK42 can­obtain its input power from a number ofsources: an included AC adapter, an ­optional
DBK30A rechargeable battery/excitation
module, or directly from a 12 VDC source,
such as an automobile battery. The DBK42
has a built-in DC/DC converter ­capable ofpowering a full complement of 5B modules
even when the unit is fully ­outfitted withstrain gage modules with bridge excitation
on every channel.

See DBK207 for rack-mount applications and DBK48
for 8B module options

The DBK42 accommodates up to sixteen 5B signal conditioning modules
Configurability. The DBK42 offers exceptionally wide ranging configurability. Forinstance, it permits you to individually
select the type of signal attached to everychannel. Also, there is no limit to the typeand combination of signals that can beattached to the DBK42.
Signal Connections. The optional CN-71 andCN-72 signal connection blocks provide aconvenient way of connecting analog signals
to the DBK42. The CN-71 connection block
is for non-­thermocouple ­applications, whilethe CN-72, which ­features cold-junction sensors, is for thermocouple applications. Eachblock contains four terminals per channel,
providing access to both the 5B modules’
input and excitation output features. Eachblock features a clear plastic shield over its
screw terminals that protects you from high­voltage on the input terminals.

* 5B modules must be purchased separately. All sales
are final with no right of return.

Measurement Computing(508) 946-5100

DBK42 Expansion Example

Notebook PC

Ethernet

P1

P2

P3

DaqBookCA-255-4T
DBK42

P1

A DaqBook expanded with a DBK42

DBK42 with installed 5B modules1

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DBK42

Specifications & Ordering Information
Specifications

The CN-71 sixteen-channel screw-terminal
signal connection block

The CN-72 sixteen-channel screw-terminal
connection box with cold-junction sensors

Connector: DB37 male, mates with P1*
Module Capacity: 16 (input only) 5B modules
Power Requirements: 10 to 24 VDC or 120 VAC withincluded adapter
With 16 T/C type modules:		 12 VDC @ 0.50A		 15 VDC @ 0.40A		 18 VDC @ 0.35A
With 16 strain gage type modules:		 12 VDC @ 1.9A		 15 VDC @ 1.5A		 18 VDC @ 1.3A
DC Input Fuse: 3A
Power Indicator: LED powered by internal 5 VDCPower Connection: DIN5 x2 for daisy chaining
AC Power Packs: 120 VAC to 15 VDC @ 0.9A
120 VAC to 24 VDC @ 2.0A (optional)
Input Connections: DIN96 rectangular standard
screw-terminal connection block (optional); choices
include:		 CN-71, without cold-junction compensation		 CN-72, with cold-junction compensation
DC/DC Converter: 10 to 24 VDC to 5 VDC (isolated)
Isolation
Input Power to System: 500 VDC
Signal Inputs to System: 1500 VDC
Input Channel-to-Channel: 500 VDCDimensions: 285 mm W x 221 mm D x 91 mm H
(11” x 8.5” x 3.5”)285 mm W x 285 mm D x 91 mm H
(11” x 11” x 3.5”) with optional signal
connection block
495 mm W x 254 mm D x 91 mm H
(19” x 9.75” x 3.5”) with optional rack-mount
kit installed
Weight: 1.8 kg (4 lbs) with no modules installed
Power Consumption: 35 mW

Ordering Information
Description
16-channel 5B expansion module
including AC adapter

Part No.
DBK42Accessories
16-channel screw terminal
connection block
16-channel screw terminal connection
block with cold-junction sensors
Rack-mount kit

CN-71
CN-72
RackDBK-1

Cables5-pin DIN to automobile cigarette
lighter power cable
Molded T expansion cable; 4 in.
Ribbon cable, where x is the numberof DBK devices attachedCA-116
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.

Product Compatibility✔ LogBook✔ DaqBook✔ DaqLab✔ DaqScan✔ DaqBoard/2000 Series

Note: Only modules with ±5V or 0-5V ouput canbe used.

5B modules* Attachment to the DaqBoard/2000 Series requires a DBK200, DBK202, DBK203A, DBK209, DBK213, orDBK214

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