Time Mark 338, 368 Data Sheet

TIME MARK is a division of

MODEL 338

MODEL 368

Recycle Timers

“Off Time First”

⚫ Most Common Voltage &

Timing Ranges

⚫ Cycles Load on/off, or

Between Two Loads

⚫ 5-Year Unconditional Warranty

DESCRIPTION

The Models 338 and 368 Recycle Timers are designed
to cycle a load on and off, or to cycle between two loads.
The ON and OFF cycles are independently adjustable on
each model. The Model 338 is a DPDT potentiometer

(knob-adjust). The Model 368 is a DPDT, high-accuracy
digital input timer. Solid-state circuits in each model drive

an internal electromechanical relay.

Each model is functionally interchangeable. They are
available in a wide variety of voltage and timing ranges, to

cover the majority of application requirements.

An “SG” version of this model is available using silver with

gold flash contacts.

Models 338 and 368 are UL Recognized and CSA

Certified.

UL SPECIFICATIONS*

Models 338 and 368

Input

Voltage (VAC)
Power 3 Watts Max

Output

10-28V AC/DC OR 40-260V AC/DC

240V AC, 10A, Resistive
120V AC, 4A, General Use
240V AC, 2A, General Use

C300, Pilot Duty

SPECIFICATIONS

MODEL 338 (knob adj.) 368 (digital)

Voltage L = 10-28V AC/DC

Timing range 10SEC: 1 - 10 Sec.

Accuracy ± 5% ± 2%
Repeatability ± 2% ± 0.1%
Recycle time 100ms
Operating temp -20°F to +140°F
Contacts DPDT
Contact rating 10A at 240VAC resistive
Transient protection 775V, 80 Joules
Humidity tolerance 0 - 97% w/o condensation
Enclosure material NORYL Plastic
Mounting 8-pin socket**
Weight 5 oz.
Agency approvals* UL Recognized and CSA Certified

Additional Options /C = Custom (Voltage and/or Timing)

Ordering Examples (Model-Voltage-Timing Range [/Options]):
368-H-0.1SEC = Model 368 with a 40-260V AC/DC voltage range

and a timing range of 0.1-102.3 seconds.
338-L-180SEC /SG = Model 338 with a 10-28V AC/DC voltage
range, a timing range of 1-180 seconds, and optional silver with gold
flash contacts.

Contact Time Mark to order a custom programmed unit

60SEC: 1 - 60 Sec.
180SEC: 1 - 180 Sec.
300SEC: 1 - 300 Sec.

H = 40-260V AC/DC

0.1SEC: 0.1 - 102.3 Sec.
1SEC: 1 - 1023 Sec.
1MIN: 1 - 1023 Min.
1HR: 1 - 1023 Hrs.

/SG = Silver with Gold Flash Contacts

** order 8-pin socket number 51X120

* Pilot Duty:
120V: Make 15A, Break 1.5A
240V: Make 7.5A, Break 0.75A

11440 East P i n e Str e e t

Tuls a , O klaho m a 74116

02/2020

© 2020 TIME MARK CORPORATION

MODEL 338 / 368

TIME MARK is a division of

Recycle Timer

READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.

KEEP THIS DATA SHEET FOR FUTURE REFERENCE.

GENERAL SAFETY

POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 338 OR 368.

ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.

THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.

Installation Instructions

OPERATION

When the supply voltage is applied, the OFF cycle begins
timing. Upon completion of the delay, the internal relay
energizes and the ON cycle begins timing. The timer will
continue cycling until the supply voltage is removed. ON

and OFF cycles can be of equal or unequal durations.

PIN CONNECTIONS

The Models 338 and 368 Recycle Timers require a

standard 8-pin socket for mounting, and use a standard

pin configuration. Refer to the pin diagram below, or on

the timer, for pin connections.

An LED on top of the unit provides a quick visual indicator of

the relay’s status.

DIMENSIONS - Model 338

DIMENSIONS - Model 368

Green Energized
Red De-energized
Flashing (Green or Red) Relay is Timing

LED Indicator Unit Status

11440 East P i n e Str e e t

Tuls a , O klaho m a 74116

Page 2 of 3 02/2020

© 2020 TIME MARK CORPORATION