Description

Fast A/D voltage or current input

Number of Channels

B873/B875

Four or eight isolated inputs

Operating Range

Voltage

1—5 Vdc

0—5 Vdc

0—10 V

-5—+5 V

-10—+10 V

Current

4—20 mA

0—20 mA

0—40 mA

-20—+20 mA

-40—+40 mA

Impedance

Voltage Mode

>10 MΩ input differentially

1.5 kΩ with power removed

Current Mode

250 Ω/input

Resolution

12 bit

Filter

Single Pole dc to 1.0 kHz

Linearity

Error

.05% of full scale over operating temperature range

Differential

0.0244% of full scale @ 25°C (77°F)

Protection

120 Vac differential input (voltage mode only)

Common Mode

Range

Input voltage plus common mode voltage less than 12 V

Rejection

>-70 dB, dc to 60 Hz

Isolation

Input to Case

1500 Vac RMS for i minute

Input to Input

30 Vdc

Input to OURBUS

1500 Vac RMS for 1 minute

Accuracy

@25°C (77°F)

0.1% of full scale (4 counts)

Over 0—60°C

0.25% 0f full scale (10 counts)

Terminal Connector

AS–8533–004

Repeatability

0.25% of full scale (10 counts) of full scale RMS, constant temperature, no averaging

Autocalibration

High/low range points recalibrated during run time

Power-up Time

5 s maximum

Warm-up Time

5 s concurrent with power-up)

Power Required

+5 V

650 mA max, 300 mA typical

+4.3 V

975 mA max, 550 mA typical

-5 V

0 mA

Data Format

0000

Power Up

8000 Hex

Out of Range

0001—4200

Valid–All Ranges

9068 Hex

Over Range

Data Update Period Rate

Four channels

2.4 ms

Eight channels

3.0 ms (including diagnostics). No additional time penalty for process or data for out-of-range condition.

Reference Type

Mapped as 8 registers input 3x

Input Type

BIN/BCD