V8RLYOPTO

VAST 8 Opto Isolated Relay Board (V8RLYOPTO)

General Description

The V8RLYOPTO has 8 relays with SPDT contacts capable of switching 3 Amps at 120 VAC and 8 optically isolated inputs configured to detect contact closures.

Quick Start

1. Install jumpers to ADDR 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 to 7.
The relays at bit numbers 8 to 15.

2. Connect the VAST cable to the SBC2000.

3. Execute the following code:

SUBROUTINE delay(arg as integer) 
LOCAL index AS INTEGER 
	FOR index= 0 TO arg 
		REM 
	NEXT 
END 
CONSTANT CRLF AS STRING = "\010\013"   
GLOBAL relay AS INTEGER, opto AS INTEGER   
PRINT CRLF,"Start" 
DO 
	PRINT CRLF 
	FOR opto = 0 TO 7 
		PRINT VTEST(opto) 
	NEXT 
	FOR relay=8 TO 15
		delay(300) 
		VSET(relay): delay(300) 
		VRESET(relay) 
	NEXT 
LOOP UNTIL 0

Software Control

VDIO_CONFIG() configures digital input and output.
VSET() will energize a relay.
VRESET() will de-energize a relay.
VOUT() will write the specified byte to the specified port.
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. See "V8RLYOPTO Address Jumpers", below, for information on which bit numbers correspond with which ports.

V8RLYOPTO Address Jumpers

Opto Connector

Pin	Signal	Pin	Signal
1	Input 0	2	Ground
3	Input 1	4	Ground
5	Input 2	6	Ground
7	Input 3	8	Ground
9	Input 4	10	Ground
11	Input 5	12	Ground
13	Input 6	14	Ground
15	Input 7	16	Ground

Relay Connector

J	Relay	COM	N.O.	NC
4	4	1	2	3
	5	4	5	6
	6	7	8	9
	7	10	11	12
5	0	1	2	3
	1	4	5	6
	2	7	8	9
	3	10	11	12

N.O.= Normally Open

Power Source

Power may be supplied over the VAST cable. Typical cable loss is 150 mV per foot of VAST cable when the V8RLYOPTO is fully energized. Power may be applied directly to the V8RLYOPTO at the PWR connector. If a separate power supply is used for the V8RLYOPTO or if the coil voltage of the V8RLYOPTO is not 5 VDC, the jumper "+R" must be removed.

Power Requirements

With all relays and opto inputs energized, the V8RLYOPTO requires approximately 1 Ampere of current at 5 VDC.

V8RLYOPTO Dimension Drawing

Dimensions are in inches.