Specifications
Section 3. Overview
3-5
Power Out
Peripheral 12 V 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 V Power Source: 1 terminal (5V) and associated ground (G)
supply power to sensors and peripheral devices requiring regulated 5
VDC.
3.1.2.5 Communications Ports
Read more! See Section 13 Telecommunication and Data Retrieval and
Section 14 PakBus Overview.
The CR1000 is equipped with several communications ports. Communication
ports allow the CR1000 to communicate with other computing devices, such as
a PC, or with other Campbell Scientific dataloggers.
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 3rd party serial telecommunications
devices. Acts as a DTE device with a null-modem cable.
Read more! See Appendix B Serial Pin-out
9-pin CS I/O port: 1 port for communicating through Campbell Scientific
telecommunications peripherals.
2-pin RS-232: 4 ports configurable from Control I/O ports for communication
with serial sensors or other Campbell Scientific dataloggers.
Peripheral: 1 port for use with some Campbell Scientific CF memory card
modules and IP network link hardware. See Section 10.2 for CF card
precautions.
The 9-pin RS-232 port is not isolated. “Isolation” means
electrically isolated, often by means of optical (light operated)
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 measurements. If optical
isolation is required, Campbell Scientific offers the SC32B
Optically Isolated RS-232 Interface as a CR1000 accessory,
which connects to the CS I/O port.
NOTE
NOTE