Watlow 365 User Manual

User’s Manual

Series 365

1/16 DIN Temperature Control

Watlow Controls, 1241 Bundy Blvd., P.O. Box 5580, Winona, MN 55987-5580, Phone: 507/454-5300, Fax: 507/452-4507

0600-0012-0001 Rev B

(1308)

March, 1998 Supersedes

$5.00

Made in the U.S.A.

Printed on Recycled Paper 10% Postconsumer Waste

Watlow Controls

Registered Company

Winona, Minnesota USA

ISO 9001

2 WATLOW Series 365 User’s Manual

Description

Specifications

The Series 365 is a 1/16 DIN factory-selectable analog latching limit, ON/OFF or PI control. The control operates from a thermocouple or RTD input and is available in several thermocouple ranges including Types J, K, T, R, S or Platinel II thermocouple.

The 365 has an integral setpot with a front panel reset switch, and a front panel LED indicator for output status. In addition to the internal reset switch, a customer supplied remote reset switch can be used with the limit control only.

Factory-selectable options include ON/OFF, PI or latching limit control modes, and auto or manual reset on power loss. In ON/OFF or PI mode, heat or cool operation is user-selectable.

The compact size of the controller allows more flexibility in applications where space is a problem, such as bench top equipment. The 365 is tested to meet NEMA 4X standards for water and corrosion resistance.

Control Mode

• Heat or cool, user selectable

• ON/OFF

• Switching hysteresis: Typically 3°F/1.7°C

•PI(Time proportional with automatic reset)

• Proportional band adjust: Typically 5 to 50°F/2.8 to 27.8°C

• Cycle time, fixed: Typically 6 seconds

• Automatic reset, fixed: Typically

0.25 repeats/minute

• Limit

• Latching

• High or low, factory selectable

• Internal reset switch and/or customer supplied remote reset switch. Automatic or manual reset on power loss (factory selectable).

Operator Interface

• Sealed membrane front panel, NEMA 4X

• LED indication of limit condition or status of load

• Integral Setpot

• Dial scale calibrated to compensate for sensor non-linearities

• Dual °F & °C scales

Input

• Thermocouple or RTD available

• Thermocouple may be grounded or ungrounded

• Thermocouple, automatic cold junction compensation

• RTD input 2 or 3 wire, platinum 100Ω @ 0°C calibrated for #3850 (DIN): 0.003850Ω/Ω°C or #3916 (JIS) 0.003916Ω/Ω°C curve.

• Thermocouple and RTD sensor break protection de-energizes output to protect system.

Output

• Solid state relay with contact suppression, Form A, 0.5A @ 24VAC min., 264VAC max., opto isolated zero-cross switching. Minimum offstate impedance is 20KΩ. Only available with ON/OFF

or PI control.

• Open collector, switched DC signal provides a minimum turn ON voltage of 3VDC into a minimum 500Ω load; maximum ON voltage not greater than 32VDC into an infinite load. Only

available with ON/OFF or PI control.

• Electromechanical relay, Form C, 5A @ 120/240VAC. Minimum offstate impedance is 20KΩ. Warranted to 100,000 cycles.

• Electromechanical relay, Form C, 10A @ 120/240VAC. Minimum offstate impedance is 20KΩ. Warranted to 100,000 cycles.

• Solid state relay without contact suppression, Form A, 0.5A @ 24VAC min., 264VAC max., opto isolated zero-cross switching. Minimum offstate impedance is 31MΩ. Only available with ON/OFF

or PI control.

Power

• Factory selectable

• 100VAC, ±10%; 50/60 Hz, ±5%

• 120VAC, -15%, +10%; 50/60 Hz, ±5%

• 208VAC, -15%, +10%; 50/60Hz, ±5%

• 240VAC, -15%, +10%; 50/60 Hz, ±5%

• 4VA power consumption

Agency Approvals

• UL, CSA and FM pending

• NEMA 4X rating, pending

Terminals

• #6 compression universal head screw terminals, accepts 20-14 gauge wire

Accuracy

• Calibration accuracy & sensor conformity: ± 1% of span maximum, at 77°F ± 5°F (25°C ± 3°C) ambient and rated line voltage.

• Accuracy span: 1000°F/540°C minimum

• Set point accuracy: ± 3% of span maximum

• Temperature stability: Typically ± 5µV / °F ambient for thermocouple. Typically < 1°F from 32 to 130°F for RTD.

• Voltage stability: ± 0.01% of span /% of rated line voltage.

Operating Environment

• 32 to 130°F (0 to 55°C)

• 0 to 90% RH, non-condensing

• Storage temperature: -40° to 158°F (-40° to 70°C)

3 6 5 _ - _ _ _ _ - _ 0 _ _

Series 365

Closed loop control, limit, ON/OFF or PI control; RTD or thermocouple input; 5A or 10A relay, DC, solid state; 1/16 DIN case

Control Type

A = ON/OFF control (heat or cool) B = PI control (heat or cool) C = High limit with manual reset D = High limit with auto reset E = Low limit with manual reset F = Low limit with auto reset

Output

B = Solid state relay, Form A, 0.5A,

with contact suppression

Only available with ON/OFF or PI control

C = Switched DC, open collector, non-isolated

Only available with ON/OFF or PI control

D = Electromechanical relay, Form C, 5A

(Warranted to 100,000 cycles)

E = Electromechanical relay, Form C, 10A

(Warranted to 100,000 cycles)

K = Solid state relay, Form A, 0.5A,

without contact suppression

Only available with ON/OFF or PI control

Input and Range

Thermocouple 601 = J 32 to 600°F or 0 to 315°C 602 = J 32 to 1382°F or 0 to 750°C 603 = K 32 to 2282°F or 0 to 1250°C 604 = T 150 to 662°F or 66 to 350C 605 = T -328 to 150°F or -200 to 66°C 606 = Pt2 32 to 2543°F or 0 to 1395°C 607 = S 32 to 2732°F or 0 to 1500°C 608 = R 32 to 2732°F or 0 to 1500°C

RTD 101 = RTD -328 to 1112°F (DIN) 102 = RTD -328 to 1112°F (JIS)

Line Voltage

1 = 120VAC 2 = 240VAC

Overlay

00 = Standard XX = Custom

WATLOW Series 365 User’s Manual 3

Model Number

4 WATLOW Series 365 User’s Manual

Installation

Panel Cutout

Your Panel

Thickness

0.06" to 0.38"

(1.5 to 9.7 mm)

1.77" to 1.79"

(44.96mm to 45.47mm)

1.77" to 1.79" (44.96mm

to 45.47mm)

0.38" (9.65mm) Minimum

0.85"

(20mm)

Figure 1 Series 365 Multiple Panel Cutout Dimensions

Figure 2 Series 365 Dimensions

RESET

-328

-250

250

500

750

1000

1112

RTD

ALARM

RESET

SERIES 365

-200-200

-100-100

100100

200200

300300

400400

500500

600600

2.1"

(53mm)

2.1"

(53mm)

0.40"

(10mm)

1.21"

(31mm)

4.1"

(104mm)

4.7"

(119mm)

1.76"

(45mm)

Installation Procedure

Follow this procedure to mount the Watlow Series 365 temperature control:

1. Make a panel cutout per the dimensions in Figure 1.

2. Remove the 365 chassis from its case. Holding each side of the bezel, press in firmly on the side grips until the tabs release, see Figure 3. Pull the chassis out of the case and set aside for later installation.

3. Make sure the rounded side of the external case gasket is facing the panel surface. Check to see that the gasket is not twisted, and is seated within the case bezel flush with the panel. Place the case in the cutout you just made. Make sure the gasket is between the panel cutout and the case bezel. See Figure 3A.

4. While pressing the front of the case firmly against the panel, slide the mounting collar over the back of the control. The tabs on the collar must line up with the mounting ridges on the case for secure installation. See Figure 3A again. Slide the collar firmly against the back of the panel getting it as tight as possible. Make sure you cannot move the case within the cutout, if you can you do not have a NEMA 4X seal.

NOTE:

Removing the Series 365 chassis from its case will make mounting easier.

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WARNING:

The Series 365 Temperature Limit Switch should be mounted in an inconspicuous location to discourage unauthorized changes to the set point. Only approved and appropriate personnel should have the authority to change the set point on the limit switch. Failure to comply with these recommendations could result in damage to equipment and property, and injury to personnel.

WATLOW Series 365 User’s Manual 5

Installation

0 to 0.019 space (0 to 0.483 mm)

Bezel

Panel

External

Case Gasket

Mounting Collar

Ridges

Teeth

Tabs

Figure 3 Mounting, Case Side View & Collar Cross Section

Mounting Collar

Cross Section

(notice the offset teeth

on each tab)

NOTE:

To guarantee a proper NEMA 4X seal, make sure the gasket between the panel and the rim of the case is not twisted and is seated properly. PRESS FIRMLY.

Now let’s make sure we have a tight seal. Use your thumb to lock the tabs into place while pressing the case from side to side. Don’t be afraid to apply enough pressure to install the control. The tabs on each side of the collar have teeth which latch into the ridges. See Figure 3B. Each tooth is staggered at a different height, so only one of the tabs on each side are ever locked into the ridges at any time.

Looking at Figure 4, you see that the tabs on one side of the collar correspond with those on the opposite side. Make sure that the two corresponding tabs are the only ones locked in the ridges at the same time. If the matching tabs are not holding the case at the same time you will not have a NEMA 4X seal. You can make a visual check, or use your finger nail to pull out on each tab.

Only one on each side is engaged, and they must be corresponding as in Figure 4. The space between the bezel and panel must be between 0 and

0.019” (0.48mm).

When removing the mounting collar, we suggest sliding a thin tool such as a putty knife or screwdriver under all three tabs on each side at once and pulling it back off the case.

5. Insert the control chassis into its case and press the bezel to seat it. Make sure the inside gasket is also seated properly and not twisted. The hardware installation is complete. Proceed to the wiring section from here.

NEMA 4X Seal Example.

Make sure that the two correspond-

ing tabs below are locked in the

ridges at the same time.

Figure 4 Case Rear View and NEMA 4X Seal Example

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