V16OPTO

VAST 16 Opto Isolated Input Board (V16OPTO)

General Description

The V16OPTO has 16 optically isolated digital inputs configured to detect contact closures.

Quick Start

1. Install ADDR jumpers to pins 1-2, 3-4, 5-6, 7-8 and 9-10 (as shipped). This puts the board at VAST address 0, with the inputs at bit numbers 0 through 15.

2. Connect the VAST cable to the SBC2000.

3. Execute the following code:

GLOBAL channel AS INTEGER 
CONSTANT crlf AS STRING = "\013\010"  
VDIO_CONFIG(0, 1) 
REM Read all 16 inputs 
DO 
	FOR channel = 0 TO 15 
		PRINT crlf, channel, ": ", VTEST(channel) 
	NEXT channel 
LOOP UNTIL 0

Software Control

VDIO_CONFIG() configures digital input.
VTEST() will return the state of an individual input bit.
VINP() will return an 8 bit byte from the specified port.

See the Vesta Multi-Tasking Basic manual for information on how these commands are used.

V16OPTO Address Jumpers

Opto Input Connector

Pin	Signal	Pin	Signal
1	Ground	2	+5v
3	Ground	4	Input 0
5	Ground	6	Input 1
7	Ground	8	Input 2
9	Ground	10	Input 3
11	Ground	12	Input 4
13	Ground	14	Input 5
15	Ground	16	Input 6
17	Ground	18	Input 7
19	Ground	20	Input 8
21	Ground	22	Input 9
23	Ground	24	Input 10
25	Ground	26	Input 11
27	Ground	28	Input 12
29	Ground	30	Input 13
31	Ground	32	Input 14
33	Ground	34	Input 15

Ports 0 or 2 = Inputs 2 - 7
Ports 1 or 3 = Inputs 8 - 15

Power Requirements

The current draw for a V16OPTO is 1mA for board logic plus 10 mA for each energized input.

V16OPTO Dimension Drawing

Dimensions are in inches.

V16OPTO Schematic