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The OP7816 (also named OP7816-2) module features 16 digital input signals.

The cards feature optical isolation of all the inputs.

The card accepts input voltages between 5V and 50V, with a 30V maximum reverse protection.

In the typical configuration, the 16 channels are routed via the mid-plane of the chassis to the Primary FPGA card (OP7161-1 or OP7170-1) which performs acquisition of the channels' state. Alternatively, if a Secondary FPGA card (OP7161-2 or OP7170_2) is installed in the front slot corresponding to the back slot where the card is installed, the acquisition of the channels can be performed by this secondary FPGA card. 

Board Layout 


OP7816 digital signal conditioning moduleOP7816 digital signal conditioning module


Input Circuit Description

The optically isolated inputs accept a wide input voltage range, from 5 to 50 volts. They are current limited to 3.6 mA. Each input has a reverse voltage protection of up to 30 volts provided by a diode.

The digital input circuit needs a 5 V supply source to power the onboard circuitry. In the case of the OP7816, this source is connected to the OP7000 chassis's 5 VDC source (not to the simulator as indicated on the figure below).

OP7816 Isolated digital input drawing


The signal conditioning module inputs have both anode and cathode sides available to the user (on the DB37F I/O connector).


When current flows from Din+ to Din -, the output of optocoupler A is low and the Din_FPGA signal is low. When no current flows, the optocoupler output A is high and the Din_FPGA signal is high.

Installation

The OP7816 digital input module must be inserted at the back of the OP7000 simulator. The card can be installed in any of the 16 back slots, provided the front slot configuration is compatible. Refer to the page OP7000V2 Adding or Replacing Boards for more information on digital I/O card placement in the chassis - the same applies to the OP7000 chassis.

Make sure that the board is properly aligned using the guide tracks before pressing it into place.

Face Plate

The faceplate provides the DB37F connector used to connect the 16 input signals.

DB37F Connector Pins Assignment

DB37

Connector

Channel

DB37

Connector

Channel


1

+IN00

20

-IN00

Pin Assignments

2

+IN01

21

-IN01

3

+IN02

22

-IN02

4

+IN03

23

-IN03

5

+IN04

24

-IN04

6

+IN05

25

-IN05

7

+IN06

26

-IN06

8

+IN07

27

-IN07

9

+IN08

28

-IN08

10

+IN09

29

-IN09

11

+IN10

30

-IN10

12

+IN11

31

-IN11

13

+IN12

32

-IN12

14

+IN13

33

-IN13

15

+IN14

34

-IN14

16

+IN15

35

-IN15

17


36


18


37


19

Specifications

Product name

OP7816-2

Part number

126-0389

Product type

OP7000 back 16 Din opto-isolated board

Number of channels

16 digital inputs

Isolation

Optical isolator

Input current

12 Vcc @ 1.5A

Maximum reverse voltage protection

30 Volts

Bandwidth

500 kHz

Voltage range

0 to 5 Vcc or 5 to 50 Vcc

Delay Low-to-High (minimum)

≈ 40 ns

Delay High-to-Low (maximum

≈ 75 ns

Dimensions

18.8 x 16.4 cm (7.4 in x 6.46 in)

I/O connector

DB37F

Operating temperature

10 to 40 ºC (50 to 104ºF)

Storage temperature

-55 to 85ºC (-67 to 185ºF)

Relative humidity

10 to 90%, non condensing

Maximum altitude

2,000 m (6562 ft.)

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