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Analog Inputs

Eight differential (16 single-ended) channels measure

voltage levels. Resolution on the most sensitive range

is 0.67 µV.

Pulse Counters

Two pulse channels can count pulses from high level (5 V

square wave), switch closure, or low level ac signals.

Switched Voltage Excitations

Three outputs provide precision excitation voltages for

resistive bridge measurements.

Digital I/O Ports

Eight ports are provided for frequency measurements,

digital control, and triggering. Three of these ports can

also be used to measure SDM devices. The I/O ports

can be paired as transmit and receive for measuring

smart serial sensors.

RS-232 Port

A PC or laptop can be connected to this 9-pin port via

an RS-232 cable.

CS I/O Port

Data transfer peripherals that require power from the

datalogger can be connected to this port via an SC12

cable. This port is also used for connecting the data-

logger to a PC via an SC32B or SC-USB interface when

optical isolation is required.

Peripheral Port

One 40-pin port interfaces with the CFM100 Compact-

Flash

Module or the NL115 Ethernet Interface and

CompactFlash Module.

Switched 12 Volt

This terminal provides unregulated 12 V that can be

switched on and off under program control.

Storage Capacity

The CR1000 has 2 Mbyte of FLASH memory for the

Operating System. The standard CR1000 provides

2 Mbytes battery-backed SRAM for CPU usage, pro-

gram storage, and data storage; an optional version

provides 4 Mbytes of SRAM. Data is stored in a table

format. The storage capacity of the CR1000 can be

increased by using a CompactFlash

card.

Communication Protocols

The CR1000 supports the PAKBUS

communication pro-

tocol. PAKBUS networks have the distributed routing

intelligence to continually evaluate links. Continually

evaluating links optimizes delivery times and, in the

case of delivery failure, allows automatic switch over to

a configured backup route.

The CR1000 also supports Modbus RTU protocol—both

floating point and long formats. The datalogger can act

as a slave, master, or both.

Enclosure/Stack Bracket

A CR1000 housed in a weather-resistant enclosure can

collect data under extremely harsh conditions. The

enclosure protects the CR1000 from dust, water, sun-

light, or pollutants. An internal mounting plate is pre-

punched for easy system configuration and exchange

of equipment in the field.

A stack bracket kit is available that allows you to attach

the CR1000 to the backplate of an ENC10/12 enclosure

in a “horizontal” orientation (i.e., the long axis of the

CR1000 spanning the short axis of the ENC10/12 enclo-

sure). This stack bracket also allows you to place a

small peripheral under the mounting bracket and secure

it with Velcro®, thus

conserving space,

and place the wir-

ing panel terminals

at about the same

height as the termi-

nals in one of our

power supplies.

Power Supplies

Any 12 Vdc source can power the CR1000; a PS100 or

BPALK is typically used. The PS100 includes one 7 Ahr

rechargeable battery, charged with ac power (requires

a wall charger) or a solar panel. The BPALK consists of

eight non-rechargeable D-cell alkaline batteries with a

7.5 Ahr rating at 20°C. An external AA-cell battery pack

supplies power while the D-cells are replaced.

Also available are the BP12 and BP24 battery packs,

which provide nominal ratings of 12 and 24 Ahrs,

respectively. These batteries should be connected to

a charging regulator and a charging source. For infor-

mation about analyzing your system’s power require-

ments, see our Power Supply product literature or

Application Note 5-F. Both can be obtained from:

www. campbellsci.com

Its low-power design allows the CR1000 to operate for up to one

year on the PS100 power supply, depending on scan rate, num-

ber of sensors, data retrieval method, and external temperature.

The stack bracket as viewed from

the side with a CR1000 attached.

1 2 3 4 5 6 7 8

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