Campbell Scientific CR3000 CR3000 Micrologger - Page 63

Communications Ports, 1.3.6 Integrated Keyboard Display

Page 63 highlights

Section 5. System Overview • Peripheral 12 Vdc Power Source - 2 terminals (12V) and associated grounds (G) supply power to sensors and peripheral devices requiring nominal 12 Vdc. This supply may drop as low as 9.6 Vdc before datalogger operation stops. Precautions should be taken to minimize the occurrence of data from underpowered sensors. • Peripheral 5-Vdc Power Source - 1 terminal (5V) and associated ground (G) supply power to sensors and peripheral devices requiring regulated 5 Vdc. 5.1.3.5 Communications Ports Read More! See sections RS-232 and TTL Recording (p. 329), Telecommunications and Data Retrieval (p. 354), and PakBus Overview (p. 356). The CR3000 is equipped with six communications ports. Communication ports allow the CR3000 to communicate with other computing devices, such as a PC, or with other Campbell Scientific dataloggers. Note RS-232 communications normally operate well up to a transmission cable capacitance of 2500 picofarads, or approximately 50 feet of commonly available serial cable. • 9-pin RS-232 - 1 DCE port for communicating with a PC through the supplied serial cable, serial sensors, or through third-party serial telecommunications devices. Acts as a DTE device with a null-modem cable. Read More! See the appendix Serial Port Pinouts (p. 551). Note The 9-pin RS-232 port is electrically isolated. "Isolation" means isolated, by means of optical isolation components, from the communications node at the other end of the connection. Optical isolation prevents some electrical problems such as ground looping, which can cause significant errors in single-ended analog measurements. Campbell Scientific offers a peripheral optically isolated RS-232 to CS I/O interface as a CR3000 accessory. Refer to the appendix Serial Input / Output Peripherals (p. 563) for model information. • 9-pin CS I/O port: 1 port for communicating through Campbell Scientific telecommunications peripherals. Approved CS I/O telecommunication interfaces are listed in the appendix Serial Input / Output Peripherals (p. 563). • 2-pin RS-232: 4 ports configurable from control I/O ports for communication with serial sensors or other Campbell Scientific dataloggers. • Peripheral: one port for use with some Campbell Scientific CF memory card modules and IP network link hardware. See Via CF Card (p. 67) for precautions when using memory cards. 5.1.3.6 Integrated Keyboard Display The keyboard display, illustrated in figure Wiring Panel (p. 35), is an integrated feature of the CR3000. It is an essential installation and maintenance tool for many applications. It allows interrogation and programming of the CR3000 datalogger independent of other telecommunications links. More information on 63

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Section 5.
System Overview
63
Peripheral 12 Vdc Power Source —
2
terminals (
12V
) and associated grounds
(
G
) supply power to sensors and peripheral devices requiring nominal 12
Vdc. This supply may drop as low as 9.6 Vdc before datalogger operation
stops. Precautions should be taken to minimize the occurrence of data from
underpowered sensors.
Peripheral 5-Vdc Power Source — 1 terminal (
5V
) and associated ground (
G
)
supply power to sensors and peripheral devices requiring regulated 5 Vdc.
5.1.3.5 Communications Ports
Read More!
See sections
RS-232 and TTL Recording
(p. 329),
Telecommunications
and Data Retrieval
(p. 354),
and
PakBus Overview
(p. 356).
The CR3000 is equipped with six communications ports. Communication ports
allow the CR3000 to communicate with other computing devices, such as a PC, or
with other Campbell Scientific dataloggers.
Note
RS-232 communications normally operate well up to a transmission cable
capacitance of 2500 picofarads, or approximately 50 feet of commonly available
serial cable.
9-pin RS-232 — 1 DCE port for communicating with a PC through the
supplied serial cable, serial sensors, or through third-party serial
telecommunications devices. Acts as a DTE device with a null-modem cable.
Read More!
See the appendix
Serial Port Pinouts
(p. 551).
Note
The 9-pin RS-232 port is electrically isolated. "Isolation" means isolated, by
means of optical isolation components, from the communications node at the
other end of the connection. Optical isolation prevents some electrical problems
such as ground looping, which can cause significant errors in single-ended analog
measurements.
Campbell Scientific offers a peripheral optically isolated RS-232
to CS I/O interface as a CR3000 accessory. Refer to the appendix
Serial Input /
Output Peripherals
(p. 563)
for model information.
9-pin CS I/O port: 1 port for communicating through Campbell Scientific
telecommunications peripherals. Approved CS I/O telecommunication
interfaces are listed in the appendix
Serial Input / Output Peripherals
(p. 563).
2-pin RS-232: 4 ports configurable from control I/O ports for communication
with serial sensors or other Campbell Scientific dataloggers.
Peripheral: one port for use with some Campbell Scientific CF memory card
modules and IP network link hardware. See
Via CF Card
(p. 67) for
precautions when using memory cards.
5.1.3.6 Integrated Keyboard Display
The keyboard display, illustrated in figure
Wiring Panel
(p. 35),
is an integrated
feature of the CR3000.
It is an essential installation and maintenance tool for
many applications.
It allows interrogation and programming of the CR3000
datalogger independent of other telecommunications links.
More information on