Model 7418/7419 | 8/16-Channel Smart Sensor Interface

Model 7418 8/16-Channel Smart Sensor Interface
  • Measures thermocouple, RTD, strain gage, voltage, 4-20 mA, thermistor, and resistance
  • 8 or 16 sensor channels with differential inputs
  • Provides excitation to passive sensors
  • Pulsed sensor excitation minimizes sensor self-heating
  • Cold-junction compensation for thermocouples
  • Each channel configurable for any supported sensor type
  • Fully electronic calibration

Description

Sensoray models 7418 and 7419 offer a cost-effective way to acquire sensor data for any STD bus system. They feature 16-bit resolution from 8 or 16 channels, each individually programmable for a different sensor type. Analog-to-digital conversion is performed in under 22 milliseconds, providing a 45 channel per second scan rate.

The 7418/19 adapter boards plug directly into any STD bus computer. Linearization, calibration, and sensitivity are software programmable, eliminating trim potentiometers and the need for board access. Sensor field wiring is accomplished with a 40-conductor flat cable and a remotely mountable screw-termination board (either Model 7409TB or Model 7409TDIN with DIN-rail mounting hardware).

Model 7418 / 7419 application

7418_19_app.jpg

Calibration

Models 7418 and 7419 automatically self-calibrate by measuring internal precision references. Reference data is stored in EEPROM so the adapter board may be easily interchanged. Signal conditioning is provided for thermistors, RTDs, thermocouples, strain and pressure, resistance and voltage inputs. Standard correction for nonlinear sensors is built in. Custom compensation can be downloaded.

Excitation

A pulsed constant-voltage source is provided for strain and pressure sensors. A pulsed constant-current source is provided for resistive sensors. Lead loss errors from RDSs, thermistors, and resistors are eliminated with the use of a four-wire circuit.

An on-board microprocessor continually scans the active sensor channels. Each channel is amplified, digitized, filtered, converted to engineering units, and stored in on-board memory. This process is independent of host CPU activity.

Specifications

Input resistance100 MΩ
Maximum input voltage63 VAC rms
CMMR95 db/min
Maximum command mode±5 V
A/D converter16-bit integrating
Conversion time22 ms/channel
A/D scan rate45 samples/second
Operating temperature-25 to 70 °C
InterfaceSTD 80
Input power 5 V (at 100 mA)
12 V (at 45 mA)
Dimensions(W x H): 4.40 x 6.90 inches

Sensor Types
ThermocouplesJ, K, T, S, E, B, N, C, R
Platinum RTD100 Ω, types 385 and 392
Nickel RTD120, 200, 1000 Ω
Copper10 Ω
Thermistors10000 Ω, YSI types 44006 or 44031
Strain gauges120 to 4000 Ω
Sensor Resolution Range
Thermocouples 0.1 °C -270 to 1760 °C
Thermistors 0.01 °C -55 to 145 °C
Resistors 0.02 Ω
0.125 Ω
31 Ω
0 to 400 Ω
0 to 3 kΩ
0 to 600 kΩ
RTDs 0.05 °C
0.0125 °C
-200 to 800 °C
0 to 400 °C
Strain/Pressure 5 µV ±100 mV
DC voltage 5 µV
20 µV
200 µV
±100 mV
±500 mV
±5 V

Documentation

File Version Type Size
Model 7418 instruction manual1.0.0PDF1.04 MB
Model 7419 instruction manual1.0.0PDF1.13 MB

Downloads

File Version Type Size
Smart A/D Software Development Kit1.0.2ZIP243 KB
Other Operating Systems
Need a software development kit for another operating system? We can port our SDK to
your OS or provide the information you need to do it yourself. Contact Sales for details.

Pricing & Ordering

Model Description Qty 1 Qty 2-9 Order Qty.
74188-Channel Smart Sensor Interface$662$601
741916-Channel Smart Sensor Interface$833$758
Termination Boards
7409TBBreakout Board, 40-pin, with CJ Sensor$67$61
7409TCBreakout Board, 40-pin, with CJ Sensor and Prototype Area, Panel Mountable$106$96
7409TDINBreakout Board, 40-pin, with CJ Sensor and Prototype Area, DIN mountable$141$126
Cables
7409CCable, flat, 40 conductor, 18 inches$20$19
7409C1Cable, flat, 40 conductor, 1 meter$29$26

SENSORAY | 7313 SW Tech Center Dr. | Tigard, OR 97223 | 503.684.8005 | Email Us

CONTACT SENSORAY

Employment | Privacy Policy | Press Releases | Copyright © 1982-2017 Sensoray