Section 5. System Overview
5.3.4 Measurement and Control Peripherals — Overview
Related Topics:
• Measurement and Control Peripherals — Overview (p. 85)
• Measurement and Control Peripherals — Details
(p. 366)
• Measurement and Control Peripherals — Lists
(p. 645)
Modules are available from Campbell Scientific to expand the number of
terminals on the CR1000. These include:
Multiplexers
Multiplexers increase the input capacity of terminals configured for analog-input,
and the output capacity of Vx excitation terminals.
SDM Devices
Serial Device for Measurement expand the input and output capacity of the
CR1000. These devices connect to the CR1000 through terminals C1, C2, and
C3.
CDM Devices
Campbell Distributed Modules are a growing line of measurement and control
modules that use the higher speed CAN Peripheral Interface (CPI) bus
technology. These connect through the SC-CPI interface.
5.3.5 Power Supplies — Overview
Related Topics:
• Power Supplies — Specifications
• Power Supplies — Quickstart
(p. 44)
• Power Supplies — Overview (p. 85)
• Power Supplies — Details (p. 100)
• Power Supplies — Products (p. 657)
• Power Sources (p. 101)
• Troubleshooting — Power Supplies (p. 494)
The CR1000 is powered by a nominal 12 Vdc source. Acceptable power range is
9.6 to 16 Vdc.
External power connects through the green POWER IN connector on the face of
the CR1000. The positive power lead connects to 12V. The negative lead
connects to G. The connection is internally reverse-polarity protected.
The CR1000 is internally protected against accidental polarity reversal on the
power inputs.
The CR1000 has a modest-input power requirement. For example, in low-power
applications, it can operate for several months on non-rechargeable batteries.
Power systems for longer-term remote applications typically consist of a charging
source, a charge controller, and a rechargeable battery. When ac line power is
available, a Vac-to-Vac or Vac-to-Vdc wall adapter, a peripheral charging
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