Measurement WBK23 User Manual

WBK15

Description

5B Isolated Signal-Conditioning Module

Description …… 1
Hardware Setup …… 2

Configuration …… 2
Connection …… 3
Power …… 4
Safety Concerns …… 4
Using Fastener Panels to Stack Modules …… 4

Software Setup …… 5
WBK15 – Specifications …… 7

The WBK15 module can accommodate eight 5B isolated-input signal-conditioning modules for use with the
WaveBook. The WaveBook can accommodate 8 WBK15s for a maximum of 64 expansion channels. The
WaveBook scans WBK15’s channels at the same 1 µs/channel rate that it scans all WBK analog inputs,
allowing it to measure all channels of a fully configured 72-channel system in 72 µs.

Other features of WBK15 include:

• Built-in power supply that operates from 10 to 30 VDC and can power a full complement of 5B

modules (even with bridge excitation).

• Removable, plug-in screw-terminal blocks for convenient connection of 5B modules.

•

On-board cold-junction sensing for thermocouple 5B modules.

•

For each 5B module, 1500 V isolation from the system and from other channels.

Current-Sense
Resistor

5.000 V

Buffered

5B

Low-

Module

Pass

Socket

Filter

#1

Input
Terminal
Block

Channel 1

Channels 2-8 identical

DC Power
Input &
Expansion

+V

Cold
Junction
Sensor

GND

DIN-5

Power
Switch

CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8

+15 V

Filters

Isolated
+5, ±15 VDC
Power
Supply

Channel
Selection
MUX

Internal Jumpers

-15 V

+5 V

WBK15 Block Diagram

Reference

Bipolar
Offset
Amp

Buffer
Amp

Control
DAC

µP &
Control Logic

EEPROM

Output
MUX

Status
LEDs

BNC

N

N

Analog
Output to
Wave Book

Expansion
Control
From
WaveBo ok

WBK15, 5B Isolated Signal Conditioning Module

988396

WBK15, pg. 1

Hardware Setup

Configuration

The next figure shows the board layout within a WBK15. Note the channel-number layout for the 5B
modules and the location for plug-in current-sense resistors.

Only current-input type modules require the plug-in resistors.
The plug-in resistors must be removed for all other module types.

Rear Panel

Front Panel - signal inputs from 8 channels

BNC

Expansion
Signal Out

CHANNEL 1

R10

ch 2

CHANNEL 2 CHANNEL 4

ch 1

BNC

Expansion

Signal In

R5

ch 1

ch 2

ch 4

Expansion

Control Out

CHANNEL 3

R16 R13

ch 3

DB15

ch 4 ch 5 ch 6

DB15

Expansion

Control In

ch 6

ch 3

WBK15 Board Layout

CHANNEL 5

R20

CHANNEL 6

R18

DIN5

Power

Out

ch 8

ch 5

CHANNEL 7

R22

CHANNEL 8

ch 7

DIN5

Power

In

Fuse

R23

ch 8

Screw-terminal
Signal Plug

ON/OFF

Switch

ch 7

Status
LEDs

WBK15, pg. 2

Installation of 5B Modules

WARNING

WARNING

WARNINGWARNING

Electric shock hazard! Turn off power to WBK15 and all connected modules and
devices before inserting or removing modules. Failure to do so could lead to injury or
death due to electric shock.

CAUTION

CAUTION

CAUTIONCAUTION

Handle the 5B module carefully while inserting pins into the daughterboard. Do not
over-tighten mounting screw.

The 5B modules plug into a daughterboard (×2) on WBK15’s motherboard. Rubber bumpers on one side
and a tilted daughterboard allow the module to rest at a 5° angle to facilitate insertion and removal. The
adjacent daughterboard has a cut-a-way to allow room for a screwdriver (see figure).

988396

WBK15, 5B Isolated Signal Conditioning Module

Connection

Screwdriver

5°angle to
facilitate installation

Rubber Rest

5B Module

5B Module

WBK15 Main Board

5B Module Insertion/Removal

WARNING

WARNING

WARNINGWARNING

5B Pins
(×14)

Mounting Screw

Daughterboard

Screw
Receptacle

Pin (×14)
Receptacles

Electric shock hazard! De-energize circuits connected to WBK15 before changing the
wiring or configuration. Failure to do so could lead to injury or death due to electric
shock.

Signals are connected by screw-terminal signal plugs that plug into the 4-pin jacks on WBK15’s front panel
(see figure).

+EXC

-

-EXC

+

-EXC Negative excitation output - only used on strain-gage type modules

- Negative signal input
+ Positive signal input
+EXC Positive excitation output - only used on strain-gage type modules

Signal Connection Jacks (per channel)

Input signals (and excitation leads) must be wired to the plug-in terminal blocks. Eight 4-terminal blocks
accept up to 8 inputs.

Terminal blocks are connected internally to their corresponding signal conditioning module. The terminal
blocks accept up to 14-gage wire into quick-connect screw terminals. Each type of input signal or
transducer (such as a thermocouple or strain gage) should be wired to its terminal block as shown in the
figure below. Wiring is shown for RTDs, thermocouples, 20mA circuits, mV/V connections, and for full­and half-bridge strain gages.

SIG H

SIG L

+Vin

-Vin-EXC

Thermocouple
Connection

+EXC

4-Wire

+

_

Full-Bridge Strain-Gage Connection

+EXC+Vin-Vin-EXC

mV and V Connection

-Vin

+EXC+Vin-Vin-EXC

+Vin

3-Wire2-Wire

+Vin

-Vin-EXC

RTD Connection

+EXC

Half-Bridge
Strain-Gage Connection

Typical Signal Connections

WBK15, 5B Isolated Signal Conditioning Module

-Vin-EXC

988396

+Vin

+EXC

-EXC

4-20 mA
Connection

+EXC

AC1362

20 Ohm
Plug-In Resistor
(SC-AC-1362)
On-Board Socket

WBK15, pg. 3