Watlow V4T User Manual

1998

November 2000

On-line version of 1967

Users Manual

1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580

Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507, http://www.watlow.com

Series V4

General Purpose

1/4 DIN Temperature Controller

2 Watlow Series V4

Overview

The V4 1/4 DIN panel mount controller is a general purpose industrial PID temperature controller.The V4 provides a reliable cost-effective solution for most temperature control applications.Thermocouple, RTD, and Current and Voltage sensors are supported. Dual outputs can be configured to support heating and cooling.The secondary output can also be configured as an alarm.

V4 features include: a NEMA 4X front panel seal, a 3-year warranty, meets European CE requirements and has a 4 inch deep case with removable connectors for wiring convenience.

Figure 2a — Series V4 inputs and outputs.

Figure 2b - Controller dimensions.

Dual Control Output -

Single Input Type J, K, T, N or S Thermocouple, RTD or Process

V4

1 2 %

PID or ON/OFF, User Selectable

Output 1 Heat or Cool

Output 2 Heat, Cool, Alarm or None

Mounting Brackets

External

Gasket

Front Bezel

Mounting Collar Customer's Front Panel

4.25"

(107.9mm)

M3 Mounting Screw

Terminal

Block

Mounting Slots

Terminal

Block

3.83"

(97.18mm)

4.21"

(106.83mm)

3.58"

(91.03mm)

Watlow Series V4 3

Installation and Removal

Figure 3 - Series V4 multiple panel cutout dimensions.

NOTE: Measurements between panel cutouts are the minimum recommended.

Installing the Series V4 Controller

Installing and mounting requires access to the back panel.

1. Make the panel cutout using the panel cutout dimensions as shown in Figure 4.

2. Make sure the rounded side of the external case gasket is facing the panel surface.

3. Check to see that the gasket is not twisted, and is seated within the case bezel flush with the panel.

4. Slightly compress the top and bottom side of the V4 Case while pulling the controller into the panel cutout (Figure 5a). Slide the mounting collar over the back of the controller.The tabs on the collar must line up with the mounting ridges on the case for secure installation. The tab holes are facing the back of the controller.

5. Adjust the mounting bracket screws enough to allow for the mounting collar and panel thickness. Snap the upper and lower mounting brackets on the case of the controller (Figure 5 b). Make sure all the grips are well engaged on the mounting slots of the controller. (The four screw heads are facing the back of the controller.)

6. Make sure the case is seated properly.Tighten the installation screws firmly against the mounting collar to secure the unit (Figure 5c). To ensure NEMA 4X seal, there should be no space between the bezel and panel. Over tightening the screws will distort the case and make it difficult to remove or replace the controller.

V4

1 2 %

Panel Cutout

Panel

Thickness

0.375"

9.5 mm)

3.62"

(92mm)

3.62"

(92mm)

0.85"

(20mm)

minimum

0.85"

(20mm)

minimum

3.93"

(99.82mm)

Watlow Series V4 4

Installation and Removal (continued)

Figure 4a - Slightly compress the case while Figure 4b - Snap the top and bottom mounting pulling the controller into the panel cutout. bracket into the slots.

Figure 4c - Tighten screw to secure the controller. Figure 4d - Remove the controller using a flat

screwdriver.

NOTE: Be careful not to over-tighten the screws. This may cause the mounting cover to fail. Over-tightening occurs when the front bezel is touching the customer’s front panel.

Removing the Series V4 Controller

1. Loosen the upper and lower mounting bracket screws.

2. Use a flat screw driver to unsnap the four grips on the opposite side of upper and lower mounting brackets. Push the brackets back and forth gently until they can be pulled off easily.

3. Remove controller from the panel.

Watlow Series V4 5

Wiring the Series V4

Power Wiring

High Voltage 100 to 240VÅ (ac), nominal (85 to 264 actual) V4TH - _ _ _ _ - _ _ _ _ Low Voltage 14 to 24V‡ (ac/dc) V4TL - _ _ _ _ - _ _ _ _

Figure 5 - Power wiring.

Sensor Installation Guidelines

We suggest you mount the sensor at a location in your process or system where it reads an average temperature. Put the sensor as near as possible to the material or space you want to control. Air flow past this sensor should be moderate. The sensor should be thermally insulated from the sensor mounting.

ç

WARNING:

To avoid damage to property and equipment and/or injury or loss of life, use National Electric Code (NEC) standard wiring practices to install and operate this unit. Failure to do so could result in injury and/or death, or such damage.

NOTE:

Taking the unit out of the case is not a normal operating condition and should only be done by a qualified maintenance installation technician. Power to the case should be disconnected before removing or installing the controller into its case.

∫

WARNING:

The case terminals may still carry live voltage when the unit is removed.

∫

WARNING: Irreversible damage will occur if high voltage is applied to the low voltage unit.

L1 L2

18

OFF

1 2

4

5

6

17

16

15

14

13

8

7

fuse

8

7

6 Watlow Series V4

Input Wiring

Figure 6a – Thermocouple

Extension wire for thermocouples must be of the same alloy as the thermocouple itself to limit errors.

Figure 6b – RTD (2- or 3-Wire) 100Ω Platinum

There could be a +2°F input error for every 1Ω of lead length resistance when using a 2-wire RTD. That resistance,when added to the RTD element resistance, will result in erroneous input to the instrument. To overcome this problem, use a 3-wire RTD sensor,which compensates for lead length resistance. When extension wire is used for a 3-wire RTD,all wires must have the same electrical resistance (i.e. same gauge, same length, multiplestranded or solid, same metal.

Figure 6c – Process,4-20mA Figure 6d – Process,0-5VÎ (dc)

Input impedance: 5Ω Input impedance: 10kΩ

NOTE:

Successful installation requires five steps:

• Choose the controller’s hardware configuration and model number;

• Choose a sensor;

• Install the con-

troller;

• Wire the controller and

• Configure the controller.

ç

WARNING:

To avoid damage to property and equipment and/or injury or loss of life, use National Electric Code (NEC) standard wiring practices to install and operate this unit. Failure to do so could result in injury and/or death, or such damage.

NOTE: When an external device with a non-isolated circuit common is connected to the 4-20mA or dc output, you must use an isolated or ungrounded thermocouple.

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CAUTION: Process input does not have sensor break protection. Outputs can remain full on.

DIP Switch Orientation 1: OFF 2: ON

+

T/C

-

DIP Switch Orientation 1: OFF 2: OFF

S1

4

S2

5

S3

6

5

6

RTD

OFF

1 2

3-wire

RTD

OFF

1 2

TC

OFF

1 2

DIP Switch Orientation

4

5

6

DIP Switch Orientation 1: OFF

RTD

OFF

1 2

2: OFF

S1

S2

S3

4

5

6

OFF

1 2

DIP Switch Orientation

4

5

6

OFF

1 2

DIP Switch Orientation

4

5

6

2-wire RTD

Jumper Terminals 5 & 6

(customer supplied)

DIP Switch Orientation 1: ON 2: ON

I

dc

- 4

+ 6

PROC

OFF

1 2

DIP Switch Orientation

PROC

OFF

1 2 1: ON 2: ON

OFF

1 2

DIP Switch Orientation

4

5

6

V

dc

+

5

6

-

OFF

1 2

DIP Switch Orientation

4

5

6

Watlow Series V4

Output 1 Wiring

Figure 7a – Mechanical Relay

Without Contact Suppression

V4T _ - D _ _ _ - _ _ _ _

Form C, rated at 8A @ 125V~ (ac) or 5A @ 240V~ (ac) Minimum load current: 100mA @ 5VÎ (dc)

Figure 7b – Solid State Relay

Without Contact Suppression

V4T _ - K _ _ _ - _ _ _ _

0.5 amps (AC loads only)

ç

WARNING:

To avoid damage to property and equipment and/or injury or loss of life, use National Electric Code (NEC) standard wiring practices to install and operate this unit. Failure to do so could result in injury and/or death, or such damage.

NOTE:

Switching inductive loads (relay coils, solenoids, etc.) with the mechanical relay, switched dc or solidstate relay output options requires use of an R.C. suppressor.

Watlow carries the R.C. suppressor Quencharc brand name, which is a trademark of ITW Pakron. Watlow Part No. 0804-0147-0000.

18

17

16

17

15

14

16

13

15

OFF

1 2

4

5

6

14

8

13

7

COM

NC NO

Customer Supplied

Quencharc

Customer Supplied

Quencharc

18

17

18

16

15

17

14

13

16

OFF

1 2

4

5

6

15

14

8

7

13

SS1

Fuse

L1

External

Load

L2

External

Load

L1

Fuse

8 Watlow Series V4

Output 1 Wiring

Figure 8a – Switched DC, Open Collector

V4T _ - C _ _ _ - _ _ _ _

Figure 8b – 4-20mA Process

V4T _ - F _ _ _ - _ _ _ _

Maximum load impedance: 800Ω

NOTE:

When an external device with a nonisolated circuit common is connected to the 4-20mA or dc output, you must use an isolated or ungrounded thermocouple.

OFF

1 2

4

5

6

V+

unregulated

V—

Internal Circuitry

18

17

18

16

15

17

14

13

16

+

External

-

Load

15

14

8

13

7

18

16

OFF

1 2

4

5

6

18

17

16

17

15

14

16

13

+

External

-

Load

15

14

8

13

7

Watlow V4T User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Series V4

Overview

Installation and Removal

Installing the Series V4 Controller

Removing the Series V4 Controller

Wiring the Series V4

Power Wiring

Sensor Installation Guidelines

Input Wiring

Figure 6a – Thermocouple

Output 1 Wiring

Figure 7a – Mechanical Relay

Figure 7b – Solid State Relay

Figure 8a – Switched DC, Open Collector

Figure 8b – 4-20mA Process