Wiring panel and terminal functions

The CR1000X wiring panel provides ports and removable ClosedterminalsPoint 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

SE
DIFF
1   2
1
H   L
3   4
2
H   L
5   6
3
H   L
7   8
4
H   L
9  10
5
H   L
11  12
6
H   L
13  14
7
H   L
15  16
8
H   L
RG1 RG2
Single-Ended Voltage    
Differential Voltage H L H L H L H L H L H L H L H L    
Ratiometric/Bridge    
Thermocouple    
Current Loop                                
Period Average
   

 

Pulse counting terminal functions

  P1 P2 C1-C8
Switch-Closure
High Frequency
Low-level Ac  

 

NOTE:

Conflicts can occur when a control port pair is used for different instructions (TimerInput(), PulseCount(), SDI12Recorder(), WaitDigTrig()). For example, if C1 is used for SDI12Recorder(), C2 cannot be used for TimerInput(), PulseCount(), or WaitDigTrig().

 

Analog output terminal functions

  VX1-VX4
Switched Voltage Excitation

 

Voltage Output

  C1-C81 VX1-VX4 5V 12V SW12-1 SW12-2
5 VDC      
3.3 VDC        
12 VDC      

1 C terminals have limited drive capacity. Voltage levels are configured in pairs.

 

Communications terminal functions

  C1 C2 C3 C4 C5 C6 C7 C8 RS-232/CPI
SDI-12          
GPS PPS Rx Tx Rx Tx Rx Tx Rx  
TTL 0-5 V Tx Rx Tx Rx Tx Rx Tx Rx  
LVTTL 0-3.3 V Tx Rx Tx Rx Tx Rx Tx Rx  
RS-232         Tx Rx Tx Rx
RS-485 (Half Duplex)         A- B+ A- B+  
RS-485 (Full Duplex)         Tx- Tx+ Rx- Rx+  
I2C SDA SCL SDA SCL SDA SCL SDA SCL  
SPI MOSI SCLK MISO   MOSI SCLK MISO    
SDM1 Data Clk Enabl   Data Clk Enabl    
CPI/CDM                

1 SDM can be on either C1-C3 or C5-C7, but not both at the same time.

Communications functions also include Ethernet and USB.

 

Digital I/O terminal functions

  C1-C8
General I/O
Pulse-Width Modulation Output
Timer Input
Interrupt
Quadrature