The dataTaker 500/600 series loggers are constructed on two printed circuit boards, which are mounted into a modular chassis which also houses the internal battery.

The dataTaker 600 series also have a Display/Keypad printed circuit board fitted above the battery tray.

The Processor printed circuit board is located in the bottom of the dataTaker 500/600 chassis. The Processor printed circuit board comprises the

microcomputer, system logic and system timing circuitry

system software in ROM memory

system and data storage RAM memory, and interface for memory cards

analog to digital converter circuitry

The Signal I/O printed circuit board is located immediately above the lower chassis of the data logger, and provides all interfacing to the data logger along its edges. The Signal I/O printed circuit board comprises the

the RS232 COMMS serial interface

the RS485 NETWORK serial interface

the analog input channels and multiplexer
- dataTaker 500 & 600 have solid state (CMOS) multiplexers
- dataTaker 505, 515, 605 & 615 have relay multiplexers

digital input/output channels

high speed counter channels

power supply and battery charger for the internal lead acid gel cell battery, and any external batteries.

12 pin connector for a connecting a Panel Mount Display module to dataTaker 500 series loggers

a regulated 5 Volt sensor power supply

ground and external reference terminals

the Wake terminal for externally waking the dataTaker 500/600 logger from the low power or sleep mode

a 25 pin plug for connection of Channel Expansion Modules.

An 8 way DIP switch is also located on the Signal I/O printed circuit board, beside the memory card socket. The DIP switch provides for

setting the baud rate for the RS232 COMMS serial interface

setting the network address of the logger

setting the local mains frequency

The top cover of the dataTaker 500/600 must be removed to access this DIP switch.

The function block diagram for the dataTaker 500/600 series loggers is illustrated in Figure 3, and indicates on which of the printed circuit boards the various sub systems reside.

All signal input and output connections to the dataTaker 500/600 loggers are made via removable screw terminals (Series 3) or fixed screw terminals (Series 1 and 2) that are arranged along the edges of the data logger. The input and output channel numbers are labelled adjacent to the screw terminals

Screw terminals for the power supply input and RS485 NETWORK serial interface are located along the rear edge of the Signal I/O printed circuit board.

The RS232 COMMS serial interface is implemented as a female 9 pin D type connector, located along the rear edge of the Signal I/O printed circuit board.

Figure 4 illustrates the layout of all terminals and connectors for the dataTaker 500/600 series loggers.

Multiplexer Types

The dataTaker 500/600 series loggers have 2 different types of analog input channel multiplexer, solid state (CMOS) multiplexer or relay multiplexer.

The major difference between these multiplexer types is the common mode voltage and the voltage ranges that the dataTakers with each multiplexer type can measure directly.

Solid State Multiplexer

The dataTaker 500 and dataTaker 600 data loggers have a solid state multiplexer for selecting analog input channels. The multiplexer uses CMOS 4052 quad analog gate devices.

The 4052 devices have a maximum input voltage of approximately 15 Volts, and will withstand a common mode voltage of up to ±3 Volts.

The multiplexer devices provide input protection for the dataTaker 500 and dataTaker 600 against excessive input voltages, because the 4052 devices will generally fuse to open circuit when damaged. These devices are socketed for easy replacement.

The dataTakers that have the solid state multiplexer have three decades of voltage input ranges of  ±25.000 mV,  ±250.00mV and  ±2500.0 mV.

Relay Multiplexer

The dataTaker 505, 515, 605 and 615 data loggers all have a relay multiplexer, which uses high precision electromechanical relays.

The dataTakers which have the relay multiplexer also have internal input attenuation which provides two categories of voltage input range as follows

when the internal attenuators are not selected, there are three decades of low voltage input ranges of  ±25.000 mV,  ±250.00mV and  ±2500.0 mV

when the internal attenuators are selected, there are three decades of high voltage input ranges of  ±7.000 V,  ±70.00 V and  ±100.0 V

The input attenuation, and hence voltage measuring ranges, are selected under program control.

The relay multiplexer has high withstanding input voltages when open contact as follows

1.5 KVolts for 10 µS

500 Volts for 50 mS

100 Volts indefinitely

Enclosures

The dataTaker 500/600 series loggers are normally supplied in the basic format as a free standing module, and can be used in this format in work rooms, laboratories and other clean areas.

Alternatively the dataTaker 500/600 series loggers can be mounted into enclosures to suit the particular application, eg. heavy duty industrial enclosures, weatherproof enclosures, portable carry cases, etc.

A variety of enclosures are available from your dataTaker supplier, for industrial, weatherproof and portable applications.

 

 

 

 

Figure 3 ñ dataTaker 500/600 Series Loggers Function Block Diagram

 

 

 

Figure 4 ñ dataTaker 500/600 Series Loggers Screw Terminal
and Connector Layout.