The 418 is a Legacy product and is not recommended for new designs. The lead time for the 418 may be as long as 12 weeks and may require a minimum quantity order. Please call for availability.
The Sensoray Models 418/19 offer a cost-effective
way to acquire sensor data for any ISA bus system. They features 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 45 channels per second scan rate.
The 418/19 adapters plug directly into any half slot ISA computer. Linearization, calibration, and sensitivity are software program- mable, eliminating trim potentiometers and the need for board access. Sensor field wiring is accomplished with a 40-conductor flat cable and remotely mountable screw- termination board, either model 7409TB or model 7409TDIN with DIN rail mounting hardware.
Calibration
Models 418/19 automatically self- calibrate by measuring internal precision references. Reference data is stored in EEPROM so the adapter boards may be easily interchanged. Signal conditioning is provided for thermistors, RTD’s, thermocouples, strain and pressure, resistance and voltage inputs. Standard correction for nonlinear sensors is built in. Custom compensation can be down loaded.
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 RTD’s, 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.
Application Notes
Thermocouples | Lead loss errors | Typical sensor connections | Low-Level Programming of 618/19
Software and Manuals
The included SDK18 (32-bit DLL) software has a DLL for Windows 95/98/N.
A ready-to-go data acquisition program, QuickSense, is available as an option.
Specifications
| Input resistance |
100 Megohms |
| Max. input voltage |
63 VAC rms |
| CMMR |
95 db min |
| Max. command mode |
+/- 5 volts |
| A/D converter |
16-bit integrating |
| Conversion time |
22 mS per channel |
| A/D scan rate |
45 samples/sec |
| Operating temperature |
-25°C to 70°C |
| PC/104 interface |
2 I/O ports |
| Input power |
5 volts at 100 mA | 12 volts at 45 mA |
| For Sensor Types, Resolution, Range and Codes click here |
Images and Mechanical Drawings
Prices
| Model 418 |
8 channel Smart A/D |
Please call for availability |
| Model 419 |
16 channel Smart A/D |
Please call for availability |
| Model 7409TB |
Small termination board (2 per 417 required ) |
Qty. 1 $65 |
Qty. 2-9 $59 |
| Model 7409TC |
Large termination board |
Qty. 1 $105 |
Qty. 2-9 $95 |
| Model 7409TDIN |
7409TC with DIN hardware |
Qty. 1 $140 |
Qty. 2-9 $125 |
| Model 7409C |
18” interconnect cable |
Qty. 1 $14 |
Qty. 2-9 $12 |
| Model 7409C1 |
1 meter interconnect cable |
Qty. 1 $28 |
Qty. 2-9 $25 |
| QuickSense |
Data Acquisition Software |
Qty. 1 $195 |
Qty. 2-9 $195 |
