Help with Sensor Transmitters specifications:
Outputs
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| Current Loop (e.g., 4-20 mA) | Variable current level outputs such as 0-20mA, 4-20 mA current loop, etc. | ||
| Voltage | Variable voltage outputs such as 0-10V, ±5V, etc. | ||
| Frequency | The output is a frequency or pulse signal such as amplitude modulation (AM), frequency modulation (FM), or pulse width modulation (PWM) or control. | ||
| Timer / Counter | The output is a counting or timing of measured events. | ||
| Relay | With switch-type outputs, the contacts are open or closed depending on the state of one or more of the inputs. | ||
| Ethernet | Ethernet is a local area network (LAN) protocol that uses a bus or star typology and supports data transfer rates of 10 Mbps. The Ethernet specification is the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. To handle simultaneous demands, Ethernet uses carrier sense multiple access/collision detection (CSMA/CD) to monitor network traffic. | ||
| Modem | Modems (modulator-demodulators) are devices or programs that enable a computer to transmit data over telephone lines. Computer information is stored digitally, whereas information transmitted over telephone lines is sent in the form of analog waves. A modem converts between these two forms. | ||
| Radio / Telemetry | Communication from the data acquisition device to a host or storage unit is achieved via radio transmission. | ||
| TTL | Transistor-transistor logic (TTL) is a common type of digital circuit in which the output is derived from two transistors. More commonly, however, TTL is used to designate any type of digital input or device. | ||
| Other | Other unlisted or specialized outputs. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Signal Inputs
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| Inputs / Channels: | This is the maximum number of analog channel inputs. The single-ended number is specified when single-ended inputs are available as twice the number of differential inputs. Differential channels use the difference between two signals as an input; common mode is filtered out. In some systems, differential inputs are combinations of two single-ended inputs. When this is the case, twice the number of differential channels are available as single-ended inputs. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Differential Channels | Differential channels have two inputs. The signal to process is the voltage (V) difference between the two inputs. For example, if one reading is 4.93 V and the other reading is 5.16 V, the meaningful value is the 0.23 V difference between the two. Often, this applies to precision measurements where the difference between two low-voltage inputs is small but critical. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Signal Inputs | |||
| Your choices are... | |||
| DC Voltage | |||
| DC Current | |||
| AC Voltage | |||
| AC Current | |||
| Frequency | Input for varying frequency, pulse, or other specialized waveform. | ||
| Charge | Charge is the output of a piezoelectric device. A charge signal typically requires filtering and amplification. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Sensor Inputs | |||
| Your choices are... | |||
| Accelerometer | The inputs are specifically for an accelerometer, such as a piezoelectric or current-fed sensor. | ||
| Thermocouple | The inputs are for a thermocouple or thermocouple series. | ||
| Thermistor | Inputs for thermistors and potentiometers handle variable resistance as a function of the process being measured. | ||
| RTD | The inputs are designed for a resistance temperature detector (RTD). | ||
| Strain Gauge / Bridge | The inputs are designed for a Wheatstone bridge, in full, half, or quarter bridge configurations. Strain gauges are sensors which commonly use Wheatstone bridges. | ||
| LVDT / RVDT | The inputs are for a linear (LVDT) or rotary (RVDT) variable differential transformer. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Specialized / Other Inputs | |||
| Your choices are... | |||
| Encoder | Inputs for an encoder signal such as binary, gray, or binary-coded decimal (BCD). | ||
| Counter / Tachometer | Typically, the inputs from counters or tachometers are one signal per cycle counts. | ||
| Timer / Clock | Inputs for any type of time signal. | ||
| Relay / Switch | Inputs for a discrete, on/off signal from an exterior device. | ||
| Other | Other unlisted or specialized inputs. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Features
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| Your choices are... | |||
| Voltage Excitation Supply | Devices have a voltage output that is meant to power or activate the sensor whose signal the device is receiving. | ||
| Current Excitation Supply | Devices have a current output that is meant to power or activate the sensor whose signal the device is receiving. | ||
| Integral Filter | Integral filters allow certain signal frequencies to pass while attenuating others. These filters can also operate on signal phase. | ||
| Integral Amplifier | Amplifiers multiply a signal to the matching scale of the input device. Amplifier gains, or multiplication factors, may be greater than one or fractional for signal reduction. | ||
| Programmable Gain | Amplifier gain may be adjusted according to the application needs. Adjustment may be from a local interface (such as a front panel) or from a computer interface. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Form Factor
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| Form Factor | |||
| Your choices are... | |||
| Printed Circuit Board (PCB) | Devices are printed circuit boards (PCBs) that attach to enclosures or plug directly into computer backplanes. | ||
| Panel / Chassis Mount | Devices attach to a panel or bolt onto a chassis. | ||
| Modular Bay / Slot System | Devices stack in modular bays or slots, and can be interfaced to other units. | ||
| Rack Mount | Devices are rack-mounted and fit inside enclosures such as a standard 19 in. telecommunications rack. | ||
| DIN Rail | Devices mount on a standard DIN rail. DIN is an acronym for Deutsches Institut für Normung (DIN), a German national organization for standardization. | ||
| Stand Alone | Devices are benchtop or floor-standing units with a full casing or cabinet, and an integral interface. | ||
| Other | Other unlisted form factors. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| User Interface | |||
| Your choices are... | |||
| None | There is no user input or programmability. Instead, there is "black box" style of storage for download or processing elsewhere. | ||
| Front Panel and Display | There are integral controls, a keypad, and/or a display on the panel of the unit. | ||
| Touch Screen | The device's visual display screen is contact-sensitive to allow direct input. | ||
| Hand-held / Remote Programmer | The interface unit is designed specifically to be held in the hand while the user enters program parameters, and may include remote programming. | ||
| Computer Programmable | The device is interfaced to a separate supervisory or host computer. | ||
| Other | Other unlisted user interface methods. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Environment
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| Operating Temperature | Full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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