3
Input Output Terminals
Analog Inputs
Twenty di erential (40 single-ended) input channels
support ve full-scale ranges (±20 mV to ±5000 mV)
at 16-bit measurement resolution. Larger signal volt-
ages are accommodated with precision 2:1 and 10:1
input voltage divider modules.
Pulse Counters
Two 16-bit pulse channels count switch closures, low
level ac pulses, and high frequency square waves.
Switched Excitation Outputs
Four switched voltage and four switched current
outputs provide precision excitation for ratiometric
sensor/bridge measurements.
Digital I/O Ports
Eight ports have multiple functions including digi-
tal control output, interrupt, pulse counting, switch
closure, frequency/period measurements, and edge
timing communication. One other port is dedicated
for SDI-12 measurements, and three additional ports
are dedicated for measuring SDM devices.
Continuous Analog Outputs
Two continuous analog outputs provide voltage levels
to displays or proportional controllers.
RS-232 Port
e RS-232 port is for connecting a PC, serial sensor,
or RS-232 modem. e PC attaches to the CR5000
via an RS-232 cable—no interface required. is port
isolates the PC’s electrical system from the datalogger,
thereby protecting against ground loops, normal static
discharge, and noise.
CS I/O Port
Many communication devices connect with the CR5000
via this port. A PC may also connect with this port,
but an SC32B or SC-USB interface is required.
Power Connections
e continuous 5 V and 12 V terminals are for connect-
ing sensors and non-Campbell Scienti c peripherals.
Two switched 12 V terminals are program controlled.
Transient Protection
Rugged gas tubes protect all terminal block inputs and
outputs from electrical transients. e CR5000 is CE
compliant under the European Union’s EMC Directive.
PCMCIA Card Slot
e PCMCIA card slot supports one Type I, Type II,
or Type III PC Card or the CF1 adapter and one
CompactFlash (CF) card. e card can be used to
expand the CR5000’s storage capacity or transport
data or programs to a PC.
e storage capacity of Type II cards exceeds 1 GB.
Type III cards provide data storage capacities exceed-
ing 1 GB but may not be suitable for all environments.
Campbell Scienti c o ers CF cards that store up to
2 GB of data.
Enclosures
e CR5000 can be housed in an ENC14/16 and
ENC16/18 enclosure. A CR5000 housed in a weather-
resistant enclosure can collect data under extremely
harsh conditions. e enclosure protects the CR5000
from dust, water, sunlight, or pollutants. An internal
mounting plate is prepunched for easy system con-
guration and exchange of equipment in the eld.
Operating Temperature Ranges
Standard operating range is -25° to +50°C; an extended
range of -40° to +85°C is available. e rechargeable
battery base has a di erent temperature range (see below).
Battery Base Options
Rechargeable Base
e rechargeable base includes an internal 7-Ahr
sealed rechargeable battery that can be charged from
vehicle power, solar panels, or ac power. Operating
temperature range is -40° to +60°C.
Low-Pro le Base (no battery)
e low-pro le base requires a user-supplied dc
source. It is preferred when the system’s power con-
sumption needs a larger capacity battery or when it’s
advantageous to have a thinner, lighter datalogger.
M
A
D
E
IN
U
S
A
(11-16)
V
G
18V G
V in
DCDC18R
BO
O
ST REG
ULATO
R
V out
When using vehicle power,
our DCDC18R Boost Regu-
lator is used to increase
the vehicle’s supply
voltage to charging
levels required by
the CR5000.
(6 strony)
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