iNet-512 와이어링 박스, 스트레인 게이지 vRef/2 

-INet-600/601 USB DAQ용

(Wiring Box with Strain Gage vRef/2 and Screw Terminals)

개요

  • 본 제품은 iNet-i600/i601 USB DAQ 디바이스를 센서와 쉽게 연결할 수 있게 하여 주는 와이어링 박스 -스트레인 게이지 vRef/2입니다.
  • i600/i601의 각 핀을 터미널 블럭으로 접근할 수 있게 하였으며, 전선 및 shunt resistor를 설치할 수 있게 디자인한 제품입니다.
  • 본 제품은 i600/i601가 제공하는 3.3V 리퍼런스 전압을 0.5배로 증폭시켜 신호를 전압의 절반으로 변환합니다.(e.g. 1.65V = 3.3V/2 = vRef/2, 1mA).
  • 이것은 스트레인 게이지와 같은 quarter and half bridge 측정에 사용이 가능합니다. (전원으로는 사용 불가)
  • 전선은 결선하여 양 옆으로 뺄수 있으며, 상판 및 하판 플라스틱이 나사로 고정되는 구조로 되어 있습니다.
  • 알림: 본 제품은 써모커플 연결에는 사용 할 수 없습니다.

특징

  • The i51x is of clamshell design with identical top and bottom plastic halves that mate via 3 bolts. Two captive 4-40 bolts secure the i51x to any i4xx card that has an Hd44 male connector. The i512 is 7 x 2.5 x 13 cm in size (2.7" x 1" x 5.3", d/w/h)
  • i51x Wiring Boxes

     

    #iNet-510 #iNet-511 #iNet-512
    Model Bnc Connectors Thermocouple Support 1/4 and 1/2 Bridge Strain Gage vRef/2 Support Individual Banks of Screw Terminals for each sensor
    i510 0 yes no no
    i511 8 no no yes
    i512 0 no yes yes

문서

  • How to Assemble & Install i51x Wiring Box
  • How to attach i51x Wiring Box to i60x Standalone USB Device
  • i512 Electrical Schematic
  • i512 Pcb Picture
  • i51x Mechanical Drawing

  • Voltage References 
    Many i4xx/i60x devices provide a 3.3V reference voltage that is used to power sensors. The i512 routes this to the "3.3V" screw terminal in each terminal bank. Also, the i512 has an internal amplifier with a voltage gain of 0.5 that takes this voltage and converts it to a signal that is half the voltage (e.g. 1.65V = 3.3V/2 = vRef/2, 1mA). This can be used in quarter and half bridge measurements where one needs to route half the voltage reference into one of the input terminals (e.g. Vin-). Vref/2 cannot be used to power sensors since it is only capable of suppling 1mA of current.

     
    Above photo shows i512
    bolted to i4xx Card

     
    Above photos show open i512.


     
    One of 8 banks of screw terminals

    Wiring to Screw Terminals 
    The i512 Wiring box provides 8 banks of screw terminals. Each bank provides access to 3.3Vref, 1.65Vref (vRef/2), 5Vpwr, Ch+, Ch- and GND; as shown to the right. Each bank is connected to channels 1/2, 3/4 .. 15/16. To see how these are labeled on the actual pcb, click here.

    Wiring i512 to a QUARTER (¼) Bridge Sensor
    The i512 can wire to a quarter bridge sensor (e.g. strain gage or load cell) with the help of one user supplied bridge completion resistor, as illustrated below. For a list of available resistors, click here. The i512's vRef/2 (e.g. 1.65V) signal forms one side of the bridge, and the other is formed by the end user completion resistor and sensor. When working with a ¼ bridge sensor and the i512, one only needs 1 additional end user completion resistor, whereas other wiring boxes (e.g. i510, i511, i100) require 3 additional resistors.

    Wiring i512 to a HALF (½) Bridge Sensor
    The i512 can wire to a half bridge sensor (e.g. strain gage or load cell), as illustrated below. No external end user resistors are required when working with half bridge sensors and the i512 wiring box. The i512's vRef/2 (e.g. 1.65V) signal forms one side of the bridge, and the sensor's two resistors form the other side. Other wiring boxes (e.g. i510, i511, i100) required 2 additional end user resistors to complete the bridge, and are therefore more cumbersome than the i512 when working with ½ bridge sensors.

     

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