VICI DVSP User Manual

Valco Instruments Co. Inc.

Digital Valve
Sequence Programmer
Instruction Manual

P. O. Box 55603, Houston, TX 77255

[phone]

•

Sales toll-free [phone]

Fax [phone]

MAN-DVSP

Rev. 1/93

Printed in USA

Table of Co ntents

1. GENERAL DESCRIPTION............................................................................... 1

2. IMPLEMENTATION...... .... .... ...... .... .... ...... .... .... ...... .... .... ...... .... .... ...... .... .... ...... .2

2.1 Solenoid Valves

2.11 110 VAC

2.12 12 VDC

2.13 Valco MSVA

2.14 Pulsed Operation of Solenoids

2.2 Valco Electric Actuators

2.21 Multiposition

2.22 Two position

2.3 Valco Digital Valve Interface (DVI)

3. SWITCH AND DISPLAY FUNCTIONS ................. .............. ................ .............7

3.1 Operating the DVSP by Remote Contact Closure

4. DEMONS TRATION SEQUENCE ...... .... .. .. .... .. .. .... .. .. .... .. .. .... .. .. .... .. .. .... .. .. .. .... .8

5. TECHNICAL DRAWINGS.................... .. .. .. .. .. .. .. .. .. .. .. .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .11

6. WARRANTY......... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .... .. .. .. .. .. .. .. .. .. .23

1. GENERAL DESCRIPTION

The Digital Valve Sequence Programmer (DVSP) is an add-on or stand-alone
timer /programmer ava ilable with ei ther 2 or 4 int ervals, se ttable in rang es of 0-99
seconds, 0-9.9 minutes, or 0-99 minutes. The DVSP is most commonly used for
remote operation of electrical devices such as solenoid valves, Valco two position
or multiposition electric actuators, and the Valco Digital Valve Interface (DVI), which
converts contact closures into pneumatic pulses for switching Valco two position air
actuators.

The DVSP has two operational modes: in the AUTO mode, the DVSP will return to
the first interval and begin another sequence after the last interval is completed,
and i n the SING LE CYCLE m ode it s tops aft er one sequ ence. During a c ycle or
sequence, simple controls allow the user to stop the cycle, reset it to Interval 1,
switch to the AUTO mode, or advance to the next interval. The DVSP can also be
wired for remote operation by contact closure from a data system or other control
device.

Each interval has one DPDT (double pole, double throw) relay, which provides two
sets of contacts with no connection from one side to the other. This means that a
single interval can be used to perform two separate functions requiring differing
voltage requirements. For example, one side of relay A (Interval 1) can be used to
switch an electr ic actuator (contact closure) while the other si de is connected to
110 VAC and switch es a 11 0 VAC sole noid valve

actuator.

second contac t. When solenoid valves are wired in serie s with this rel ay the result
is "pulsed operation" of the air actuator, which avoids the potential valve and ac­tuato r p robl ems as s oc iat ed wit h co nti nu ou sl y-a pp lie d ai r p re ssu re.

In ad dition , Relay E (f unctiona l only i n the AUTO mode) s upplies a two

at the same time as the electric

Both 12 VDC and 110 VAC power s upplies are inclu ded withi n the DVSP, but the
relays may be supplied from any external power source. For example, 24 VDC
solenoid valves can be switched by the DVSP relays if the 24 volts is supplied to
the re lays f r om a n external 24 V DC power su pply.

SPECIFICATIONS
General

3-wire power cord (2 meters)
Externally access ible 2A fuse
95-1 30 VAC, 25-60 H z
2 or 4 intervals; settable from 0 - 99 seconds, 0 - 0.9 minutes, or 0 - 99 minutes
DPDT relay con tacts rate d at 3 am ps @1 20 VAC resistive load
Elapsed time display

Dimensions

30 cm (11. 8") x 15 cm ( 6") x 6 c m (2. 4")
Weight: 2 Kgm (4 lbs)

Accuracy

2.16 seconds/day maximum error

Temperature range

0 - 70°C

Power Consumption

110 VAC @ 50 mA
12 VDC @ 200 mA

1

2. IMPLEMENTATION

Before rem ovi ng the to p cov er of th e DVSP, make ce r t ain th a t th e p ower
cord is unplugged.

Remove the two screws on the upper rear panel which secure the top cover. Look
at

Figure 1

large printed circuit board. The terminals are grouped beside letters denoting re­lays A, B, C, and D, and are marked C for Common, NO for Normally Open, and

for Normally Closed . For convenience, the power lin e (fus ed and swi tched) is

NC

connec ted to two of the ter minals on the DVS P mother boa rd, label led

NEUT

to loc ate the two ba rrier t ermina l strips located ne ar the cent er of the

.

is the high side of the line and

HOT

is the low side.

NEUT

HOT

and

PIN FOR RE-

MOTE "RUN"

PIN FOR

REMOTE "STOP"

LOGIC

BOARD

PIN FO R
REMOTE
"GROUND"

PIN FO R
REMOTE
"+12"

Figure 1:

TERMINAL STRIPS

View of DVSP with cover removed

GRND

+12

HOLE FOR WIRING

NEUT
HOT

For operat io n of devic es re qui rin g line vo ltage (1 am p max), one si de of t he devic e
is conn ected direc tly to t he

ter minal and the

NEUT

is switch ed by the o utput

HOT

relays. For devices which operate on 12 VDC (300 mA max), voltage can be
suppl ie d t o any of the r elay s w it h a si mp le j ump er co nn ect i on b et wee n t he t er m inal
marked

and the Common te rmin al of the ta rget rel ay. (

12

Figure 2

) Any external
power source can be connected to a Common in the same manner, with a hole
provided in the rear panel to allow a passage for all the external wiring.

TERMINALS FOR
ADDITIONAL RELAY WITH
TWO SECOND CONTACT

The DVSP output relays are double pole, d ouble throw (D PDT), meanin g that they
have two separate sets of contacts with no connection from one set to the other.
One contact of each set is the common (C), which is connected to the normally

not

closed (NC) contact when the DVSP is

in the interval corresponding to that
relay. As the DVSP enters each interval, the corresponding relay switches and
connects the common (C) terminal to the normally open (NO) terminal, sending
the current to the external device.

2

The tabl e below indica tes whic h grou p of ter minal s appl ies to each in ter val for the
various DVSP models. In the drawings which illustrate the different wiring options,
the terminal groupings are chosen purely for convenience: there is no intent in
these drawings to convey any information about specific intervals.

2.1 Solenoid V alves

2.11 110 VA C

DVSP-2 Interval 1 Relay A

Interval 2 Relay C

DVSP-4 Interval 1 Relay A

Interval 2 Relay B
Interval 3 Relay C
Interval 4 Relay D

The steps described below are illustrated in

1. Supply 110 VAC by connecting the

Figure 2.

terminal to C of the appropriate

HOT

relay.

2. Connect one wire of the solenoid to the

NEUT

terminal.

3. Connect the other wire of the solenoi d to the normally open (NO) terminal of
the relay which corresponds to the C of Step 1.

2.12 12 VDC

The steps described below are
illustrated in

Figure 2.

12 VDC SOLE-

NOID

110 VAC SOLE-

NOID

1. Supply 12 VDC by connecting
the

terminal to C of the ap-

+12

propriate relay.

2. Connect one wire of the sole­noid to the

GRND

terminal.

3. Connect the other wire of the
solenoid to the normally open
(NO) terminal of the relay which
corresponds to the C of Step 1.

Figure 2:

12 VDC and 110 VAC solenoids

3

2.13 Valco MSVA

The MSVA is used wi th a two pos ition air actuator, whic h require s
one interval to switch to the inject position and another to switch to
the load position. The steps described below are illustrated in

Figure 3

.

1. Supply the proper voltage (110 VAC in this example) by
connecting the

terminal to C of the one of the groups of

HOT

terminals to be used, and jumping it to C of the other.

2. Connect one wire of each solenoid to the

NEUT

terminal.

3. Connect the other wire of each solenoid to the NOs which
correspond to the Cs of Step 1, according to the desired
switching sequence.

Figure 3:

110 VAC Valco MSVA

2.14 Pulsed Operation of Solenoids

The first three procedures demonstrate the simplest uses of the DVSP. This
example w ill illu strate th e use of the pulsed relay in conjunct ion with t wo devices
on the same DPDT relay. The steps described below are illustrated in

1. Connect the two wires of the 12 VDC

12 VDC SOLE-

NOID

Figure 4.

solenoid as descri bed i n Sec tion 2. 12.

2. Connect one wire of the 110 VAC sole­noid to

as described in Section

NEUT

2.11, but connect the other wire to the

second

NO terminal of the

same

relay
to which the 12 VDC solenoid is con­nected.

3. Supply 12 VDC by connecting the

+12

terminal to one of the NO terminals on
the pulsed relay (

Figure 1

) and
connecting that NO’s related Common
to the Common of the NO which has
the 12 VDC solenoid connected to it.

110 VAC SOLE-

NOID

4. Likewise, supply 110 VAC by connecting
the

terminal to the remaining

HOT

NO

terminal on the pulsed relay and
connecting that NO’s related Common
to the Common of the NO which has
the 110 VAC solenoid connected to it .

4

Figure 4:

two events on one relay

Use of the pulsed relay and

TERM IN AL S F OR
EXTRA RELAY
WITH TWO SEC­OND PULSE

2.2 Valco Electric Actuators

Multiposition actuators require only one event to step the valve/actuator to its next
position. However, the two position actuator requires two intervals: one to switch
the two position valve to its inject position and another to switch it to its load
position.

2.21 Multiposition

GREY WIRE

WHITE WIRE

Figure 5 :

Valco multiposition electric actuator

BLACK WIRE

GREEN WIRE

RED WIRE

Figure 6:

Valco two position electric actuator

The steps below are illustrated in

Figure 5

.

1. Locate the two pairs of adjacent grey and
white wires in t he interface cable supplied with
the actuator. The relevant pair for this applica­tion is the one near the center of the ribbon
cable.

2. Connect the grey (STEP) wire to the

NO

terminal of the appropriat e relay.

3. Connect the white (GRND) wire to C or the
same relay.

2.22 Two position

The steps below are illustrated in

Figure 6

.

1. Locate the black, red, and green wires in the
remote switching cable extending from the
cover of the actuator.

2. Connect the black (INJECT) wire to the

NO

terminal of the appropriate relay for the de­sired interval.

3. Connect the red (LOAD) wire to the

NO

terminal of the relay corresponding to the
interval where sample is to be loaded.

4. Connect the green (GRND) wire to the

ommon of one of the relays and use a

C

jumper to connect it to the Common of the
other relay.

5

2.3 Valco Digital Valve Interf ace (DVI)

Two inter vals are req uire d with the DVI: one to signal it to
move the valve to the inject position, and one to signal it
to retu rn t o the l oad pos ition. The s teps des cribe d below
are illustrated in

Figure 7

1. Connect the air actuator to the DVI as described in
the DVI liter atur e.

2. Locate the blue, black, and red wires in the interface
cable supplied with the DVI.

3. Connect the blue (INJECT) wire to the NO terminal
of the appropriate relay for the desired interval.

4. Connect the black (LOAD) wire to the NO terminal
of the relay corresponding to the interval where
sample is to be loaded.

5. Connect the red (GRND) wire to the Common of
one of the NOs used in Steps 3 and 4, and use a
jumper to connect it to the Common of the other

.

NO

In routine operation the DVSP will control the
switching of the valves, so manual control through
the DVI will not be an issue. However, it is possible
to allow the option of manually overriding the posi­tioning of valves switched by the DVI. To do this, the
DVSP signal must be removed from the DVI remote
cable by routing the DVI common (RED) through the
pulsed relay, E. The signal from the DVSP is ap­plied for only two seconds and then removed, per­mitting subsequent manual valve positioning with
the switch on the front of the DVI.

.

Figure 7:

DIGITAL VALVE

INTERFACE

BLUE WIRE

RED WIRE

BLACK WIRE

Valco Digital Valve Interface

6