Page 1
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
Page 2
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
Page 3
MODEL 338 / 368
TIME MARK is a division of
1 1
Code: = switch OFF
2 2 ⚫
= switch ON
4 ⚫ 4 ⚫
8 8
16 16
32 32 ⚫
64 64 ⚫
128 ⚫ 128
256 ⚫ 256
512 ⚫ 512
ON
OFF
1 ⚫ 1 ⚫
Code: = switch OFF
2 ⚫ 2 ⚫
= switch ON
4 ⚫ 4 ⚫
8 8
16 ⚫ 16
32 ⚫ 32
64 64
128 128
256 256
512 512
ON
OFF
Recycle Timers
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
ADJUSTMENT PROCEDURE - Model 368
The procedure to determine the switch selections for the
digital Model 368 Recycle Timer requires some simple
calculations, which can be completed easily after the basic
steps are explained.
1. Convert the time required to minutes, seconds, or
tenths of seconds, depending upon the timing range
of the unit. For example:
7 hrs, 32 min = (7x60)+32 = 452 minutes
15 min, 2 secs = (15x60)+2 = 902 seconds
6.7 secs = (6.7*10) = 67 tenths of a second
2. 2. To set a desired delay period on the timer, just
add the values of the selected dip switches (beginning
with the largest value first) to total the desired time.
e.g. #1: 100 seconds OFF; 900 seconds ON
e.g. #2: 5 minutes OFF; 55 minutes ON
32+16+4+2+1 = 55 minute ON delay
4+1 = 5 minute OFF delay
WARRANTY
This product is warranted to be free from defects in
materials and workmanship, and is covered by our
exclusive 5-year Unconditional Warranty. Should this
device fail to operate for any reason, we will repair it for
five years from the date of manufacture. For complete
warranty details, see the Terms and Conditions of Sales
page in the front section of the Time Mark catalog or
contact Time Mark at 1-800-862 -2875.
512+256+128+4 = 900 second ON delay
64+32+4 = 100 second OFF delay
11440 East P i n e Str e e t
Tuls a , O klaho m a 74116
Page 3 of 3 02/2020
© 2020 TIME MARK CORPORATION
Page 4
TIME MARK is a division of
Have Questions? Call us at (800) 862-2875 and talk to a real live person.
11440 E a s t Pi n e S tree t
Tuls a , O klaho m a 74116
02/2020
© 2020 TIME MARK CORPORATION
Loading...