Wiring panel and terminal functions
The CR350 wiring panel provides ports and removable terminals Point at which a wire (or wires) connects to a wiring panel or connector. Wires are usually secured in terminals by screw- or lever-and-spring actuated gates with small screw- or spring-loaded clamps. for connecting sensors, power, and communications devices. It is protected against surge, over-voltage, over-current, and reverse power. The wiring panel is the interface to most data logger functions so studying it is a good way to get acquainted with the data logger. Functions of the terminals are broken down into the following categories:
- Analog input
- Pulse counting
- Analog output
- Communications
- Digital I/O
- Power input
- Power output
- Power ground
- Signal ground
Analog input terminal functions |
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SE DIFF |
1 2 ┌1┐ H L |
3 4 ┌2┐ H L |
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Single-Ended Voltage | ✓ | ✓ | ✓ | ✓ |
Differential Voltage | H | L | H | L |
Ratiometric/Bridge | ✓ | ✓ | ✓ | ✓ |
Thermocouple | ✓ | ✓ | ✓ | ✓ |
Current Loop | ✓ | ✓ |
Pulse counting terminal functions |
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C1 | C2 | P_SW | P_LL | SE1 | SE2 | SE3 | SE4 | |
Switch-Closure | ✓ | ✓ | ✓ |
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High Frequency | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Low-level AC | ✓ | |||||||
Quadrature | ✓ | ✓ | ✓ | ✓ |
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Period Average |
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✓ | ✓ | ✓ | ✓ |
Analog output terminal functions |
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VX1 | VX2 | |
Switched Voltage Excitation | ✓ | ✓ |
Voltage output terminal functions |
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C1 | C2 | SE1-4 | VX1 | VX2 | P_SW |
12V |
SW1 SW2 |
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3.3 VDC | ✓ | ✓ | ✓ | ✓ | ||||
5 VDC | ✓ | ✓ | ✓ | ✓ | ||||
BAT + | ✓ | ✓ |
Communications terminal functions |
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C1 | C2 | SE1-3 | RS-232 | COM2 | COM3 | |||||
SDI-12 | ✓ | ✓ | ||||||||
RS-232 | ✓ | ✓ | ✓ | |||||||
RS-232 0-5V | ✓ | ✓ | ||||||||
GPS Time Sync | ✓ | ✓ | ✓ | |||||||
GPS NMEA Sentences | Rx | Rx | Rx | |||||||
RS-485 Half duplex |
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RS-485 Full duplex | Tx pair | Rx pair | ||||||||
Digital I/O terminal functions |
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C1 | C2 | P_SW | SE1 | SE2 | SE3 | SE4 | |
General I/O | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Pulse-Width Modulation Output |
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✓ | ✓ | ✓ | ✓ | ||
Interrupt | ✓ | ✓ |
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✓ | ✓ | ✓ |
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