Enciris Technologies - Sensoray Products Division :: Analog I/O boards :: PC/104

ENCIRIS TECHNOLOGIES - SENSORAY PRODUCTS DIVISION

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Model 7421 Analog and Digital Interface

Features

Three quadrature encoder channels with 16-bit counters
Four 12-bit D/A outputs
Eight 12-bit differential A/D inputs, 50 kHz rate
Watchdog timer
Twenty-four bi-directional digital signals for solid state relay boards
STD bus compatible

Description

The Sensoray Model 7421 low cost interface saves space in STD bus systems by combining five functions into one module. Four flat cables connect the Model 7421 to external breakout boards.

Encoders
Three 16-bit up/down counter channels are optimized for incremental encoders. Each channel accepts two phased TTL or RS-422 signals to track encoder direction and displacement. Unlike conventional counters, the 7421 counters do not accumulate errors when the encoder dithers or changes direction. The 7421 supplies 5-volt power to each encoder channel.

A/D
Eight differential input channels are multiplexed to a sample/hold and successive approximation A/D. A resistor-programmable instrumentation amplifier allows gains of 1 to 1000. The 15-volt outputs from the DC/DC supply ensure A/D linearity for 10 volt input signals.
D/A
Four voltage output channels may be programmed for 0 to +10 volts. One channel has a remote sense input to minimize line loss errors. All output voltages are reset to zero volts whenever a bus reset occurs.

Watchdog Timer
The 7421's watchdog timer output may be routed to either bus reset or nonmaskable interrupt. It may be enabled or disabled under program control. The timer is automatically disabled whenever a bus reset occurs

Digital I/O
The Model 7421 has twenty-four digital I/O lines with industry standard pinouts for solid state relay boards. Each line is software programmable as an input or output. The status of output lines may be monitored by software. Whenever a system reset occurs all output channels are turned off.

Software and Manuals
7421 Instruction Manual >> 7/28/99

Model 7421

7421 example

General Specifications

Input resistance

1000 Mohms

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 85°C

Interface

STD 80

Input power

5 volts at 100 mA

Sensor Types, Resolution, Range and Codes

Sensor connector pinout

Details

SKU	SKU16177
Weight	300.00 g
Single item price(ex. VAT):	Contact us for pricing!

	Contact us for availability

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Accessories

	7409C \| Cable: 40 conductor, 18” flat cable
	7409C1 \| Cable: 40 conductor, 1 meter flat cable for connection to analog signals
	Model 7409TB \| Termination Board
	Model 7409TC \| Termination Board
	Model 7409TDIN \| Termination Board
	7501C \| Cable: 50 conductor, 18” flat cable
	7501C1 \| Cable: 50 conductor, 1 meter flat cable
	Model 720RB \| Solid State Relay Board
	Model 720RBDIN \| Solid State Relay Board
	Model 7506TDIN \| 40 Contact Terminal Board
	Model 7505TDIN \| 50 Contact Termination Board