Watlow 935 Data sheet

S E R I E S 9 3 5

Small • Easy to Use • Reliable

Temperature Control with a Timer

Watlow’s popular Series 935 panel-mounted, digital
indicating, temperature controller with timer is now
available with a separate input for remote timer start.
It also includes a single temperature sensor input
from a thermocouple or RTD sensor, and dual control
outputs. The outputs may operate in a variety of modes
including: heat, cool, alarm and timer. The timer function
operates in a choice of delay-on, delay-off, signal-on or
signal-off modes.

The Series 935A offers even more flexibility with a unique
remote set point input; this feature makes the 935 the
building block for multi-loop control. The new Series 935B
option provides a separate input to initiate timer start from a
remote switch. Front panel lock capability rounds out the
feature set on both versions. With both hardware and
software lockouts, the Series 935 will match your security
requirements without compromising usability.

Features and Benefits

1

⁄32 DIN package

• Small panel footprint

NEMA 4X

• Water/corrosion-proof front panel

Easy, push-to-set key action

• Simple operation

Countdown timer

• Control simple event

Remote set point input

• Low cost temperature control for multiple zones

Remote timer input

• Flexibility for timing applications

Universal power supply

• Worldwide flexibility

UL®/CSA/CE approval

• Assured safety

±0.25% accuracy

• Accuracy with economy

UL®is a registered trademark of Underwriter’s Laboratories Inc.

Your Authorized Watlow Distributor Is:

Actual Size

WIN-935A-0702

1241 Bundy Boulevard, P.O. Box 5580
Winona, Minnesota 55987-5580 USA
Phone: [phone]
Fax: [phone]
Internet: www.watlow.com
e-mail: [e-mail]

North American Sales Offices: Atlanta, [phone] • Austin, [phone] • Birmingham, [phone] • Charlotte, [phone] •

Chicago, [phone] • Cincinnati, [phone] • Cleveland, [phone] • Dallas, [phone] • Denver, [phone] •
Detroit, [phone] • Eastern Canada, [phone] • Houston, [phone] • Indianapolis, [phone] • Kansas City, [phone] •
Los Angeles, [phone] • Louisiana, [phone] • Maryland/Virginia, [phone] • Minneapolis/Manitoba, [phone] •
Nashville, [phone] • New England, [phone] • New York/New Jersey/Philadelphia, [phone] • New York, Upstate, [phone]

• Ontario, [phone] • Orlando, [phone] • Phoenix, [phone] • Pittsburgh, [phone] • Portland, [phone] •
Raleigh/Greensboro, [phone] • St. Louis, [phone] • Sacramento, [phone] • San Diego, [phone] •
San Francisco, [phone] • Seattle, [phone] • Tampa/St. Petersburg, [phone] • Tulsa, [phone] •
Western Canada, [phone] • Wisconsin, North [phone] • Wisconsin, South [phone]

Asian Sales Offices: Australia, [phone] • China, [phone] • Japan, [phone] • Korea, [phone] •

Malaysia, [phone] • Singapore, [phone] • Taiwan, [phone] European Sales Offices: France, [phone] •
Germany, [phone] • Italy, [phone] • United Kingdom, [phone]

Latin American Sales Office: Mexico, [phone]

© 2002 Watlow Electric Manufacturing Company Printed in the USAon Recycled Paper, 15% Postconsumer Waste

Specifications-W935-XSPN Rev E03

Control Mode

• Auto-tune PID, PID, PD, PI, on-off

• Countdown timer; hours:minutes, minutes:seconds

• Timer output modes; Delay-off, Delay-on, Signal-off, Signal-on

Agency Approvals

• U L®/ C - U L®508, File #E102269

• N E M A4 X2(IP65) rated front panel

• CE approved
89/336/EEC Electromagnetic Compatibility Directive:

EN 50081-2: 1994 Emissions
EN 50082-2: 1995 Immunity

73/23/EEC Low-voltage Directive:

EN 61010-1: 1993 Safety

Operator Interface

• Single, seven-segment digital display, factory selectable red or green

• Outputs/operation annunciators, three discrete LEDs

• Three tactile feedback momentary switches

• Front panel lock dry contact closure disables front panel operation

A c c u r a c y

• ±0.25% of span, or

• Types S and Tthermocouple @ < 200˚C, ±0.32% of span typical

Ambient Rejection

• < 0.15°C/°C rise in ambient, or

• Types S and Tthermocouple @ < 0.47°C/°C rise in ambient t y p i c a l

S e n s o r s / I n p u t s

• Type E, J, K, N, S and T thermocouple, grounded or ungrounded junction

• RTD, two wire 100Ω base (DIN) resistance

• Remote set point input, field-selectable, 0-5VÎ(dc), scaleable, 10kΩ input
impedance (Remote Input Option A o n l y )

• Remote timer start dry contact closure initiates timer start
(Remote Timer Start Option B only)

Input Range
T h e r m o c o u p l e

Type E - 2 0 0 t o 7 9 9 ° C ( - 3 2 8 t o 1 4 7 0 ° F )
Type J 0 t o 7 5 0 ° C ( 3 2 t o 1 3 8 2 ° F )
Type K - 2 0 0 t o 1 2 5 0 ° C ( - 3 2 8 t o 2 2 8 2 ° F )
Type N 0 t o 1 2 5 0 ° C ( 3 2 t o 2 2 8 2 ° F )
Type S 0 t o 1 4 5 0 ° C ( 3 2 t o 2 6 4 2 ° F )
Type T - 2 0 0 t o 3 5 0 ° C ( - 3 2 8 t o 6 6 2 ° F )

RTD Resolution (DIN)

1 ° - 2 0 0 t o 7 0 0 ° C ( - 3 2 8 t o 1 2 9 2 ° F )
0 . 1 ° - 1 2 8 . 8 t o 5 3 7 . 7 ° C ( - 1 9 9 . 9 t o 9 9 9 . 9 ° F )

Control Output

• Output update rate: 1/sec (1Hz)

#1 Output/Remote Input

• S w i t c h e dÎ(dc) logic signal, 5VÎ(dc) @ 25mAnominal, short
circuit protected, non-isolated (Remote Input Option A o n l y )

• S w i t c h e dÎ(dc) logic signal, 6VÎ(dc) @ 60mAnominal, short
circuit protected, non-isolated (Watlow DIN-A-MITE®power controller
compatible) (Remote Timer Start Option B only)

#2 Output

• S w i t c h e dÎ (dc) logic signal, 6VÎ(dc) @ 60mAnominal, short circuit
protected, non-isolated (Watlow DIN-A-MITE®power controller
c o m p a t i b l e )

• E l e c t r o m e c h a n i c a l1r e l a y, Form A, 2A, 240V~(ac) without contact
s u p p r e s s i o n3 (Remote Input Option A o n l y )

• Solid state relay, Form A, 0.5A, 24 to 264V~(ac), without contact
s u p p r e s s i o n3. Off state output impedance 31MΩ. (Remote Input
Option Aonly)

Output Cycle Ti m e

• S w i t c h e dÎ(dc) and solid state relay; 5.0 sec default, 0.1 sec minimum

• Electromechanical relay; 30.0 sec default, 5.0 sec minimum

Line Vo l t a g e / P o w e r

• 100-240V~(ac) +10%, -15%; (85-264V~(ac), 50/60Hz, ±5%

• 2 4 - 2 8 Vı(ac/dc) +10%, -15%; (20-31Vı(ac/dc), 50/60Hz, ±5% (Remote
Input Option Ao n l y )

Operating Environment

• 0 to 65°C (32 to 149°F)

• 0 to 90% RH, non-condensing

T e r m i n a l s

• Touch-safe set screw type, accepts 22-12 gauge wire

Ordering Information-W935-XMNN Rev E04

To order, complete the code number on the right with the
information below:

9 3 5 - 1 C - 0

Series 935—Single thermocouple or

RTD (DIN) input, dual output, single
display temperature controller with time
f u n c t i o n and four digit display

Remote Inputs

A = Remote set point input or front panel

lock input in place of output #1

B = Separate input for remote timer start

or front panel lock

#1 Output/Remote Input

C = SwitchedÎ(dc), logic signal,

non-isolated, (Optionally used for remote
set point input or front panel lock input for
Remote Input Aoption only)

#2 Output

C = SwitchedÎ(dc), logic signal non-isolated
D = Electromechanical1relay, Form A, 2A,

240VÅ(ac), without contact suppression

3

(Only available with Remote Input Option A)

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

24-264VÅ

(ac)

without contact suppression

3

(Only available with Remote Input Option A)

Power Supply

0 = 100-240VÅ(ac) nominal (high voltage)
1 = 24-28Vı(ac/dc) nominal (low voltage)

(Only available with Remote Input Option A)

Custom Options

00 = None
AA = No Watlow logo
XX = Custom label or parameters, Consult factory

for options.

Display

R = Red displays
G = Green displays

1

Electromechanical relays warranted for 100,000 closures only.
Solid state switching devices recommended for applications
requiring fast cycle times or extended service life.

2

To effect NEMA4X (IP65) rating requires a minimum mounting
panel thickness of 1.5 mm (0.06 in.) and a surface finish not
rougher than 0.000812 mm (0.000032 in.).

3

When using this output to drive a solenoid, MDR or
electromechanical relay (contactor), protect output with a
Quencharc®. Order code number 0804-0147-0000. Refer to
owner's manual for wiring information.

Quencharc®is a registered trademark of ITW Paktron.

Dimensions