Time Mark 2621 Data Sheet
MODEL 2621
TIME MARK is a division of
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INPUT
Switch Position Lo Trip Set Point Hi Trip Set Point
Off Lo Relay De-Energizes Relay Energizes
On Lo Relay Energizes Relay De-Energizes
Voltage Monitor
Pick Up Drop Out
SPDT Output in Standard Relay
Configuration
AC or DC Versions
Switch Selectable Relay Operation
Relay On or Off on Low
Dual Set Points are Ideal in Battery
Charging Applications
DESCRIPTION
The Model 2621 Pick Up Drop Out Voltage Monitor is designed to monitor single phase equipment. The Normal LED
indicates the relay is ENERGIZED. Toggle switch settings
are as follows:
The Model 2621 is available in AC or DC versions. AC
models of the 2621 are not frequency sensitive and can be
used on systems from 50 to 400Hz. The voltage set-points
are screwdriver adjustable over a wide operating range.
The SPDT ouput configuration is identical to the configuration
of general purpose relays. This unit requires a standard 8pin socket for mounting.
DIMENSIONS
SPECIFICATIONS
2621 - AC VERSIONS
Nominal AC voltages
Max input voltage 32VAC 160VAC 250VAC 285VAC 264VAC
Under voltage range 19-26VAC 90-132VAC 185-229VAC 200-264VAC 178-233VAC
Over voltage range 22-29VAC 108-150VAC 187-240VAC 216-270VAC 198-242VAC
Input frequency (Hz) 50 - 400Hz
Nominal DC Voltage 12VDC 24VDC 28VDC 48VDC 110VDC
Max input voltage 17VDC 32VDC 37VDC 62VDC 145VDC
Under voltage range 10-13VDC 19-26VDC 22-30VDC 38-50VDC 85-121VDC
Over voltage range 11-15VDC 22-29VDC 25-34VDC 43-58VDC 99-135VDC
Power consumption ± 2 watts max
Set-point stability ± 0.5% of set-point
Polarity protection DC versions only
Trip response 0.5 sec fixed (± 0.1 sec)
Reset time 0.1 sec
Output contacts SPDT
Contact rating 10A at 240VAC resistive
Expected relay life Mechanical: 10 million operations
Operating temp - 14° to +122°F
Humidity tolerance 97% w/o condensation
Mounting 8-pin socket (*order separately)
Case material ABS plastic
Weight 5 oz.
24VAC 120VAC 208VAC 240VAC 220VAC
2621 - DC VERSIONS
2621 - ALL VERSIONS
Electrical: 100,000 at rated load
* Order 8-pin socket number 51X120
Sales (800) 862-2875
Main (918) 438-1220
PIN DRAWING
Shown De-Energized
11440 East P i n e St r e e t
Tuls a , O klaho m a 7411 6
09/2016
© 2016 TIME MARK CORPORATION
MODEL 2621
Switch set to off LO
MODEL 2621
TIME MARK is a division of
2 7 1
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Sensing
Circuit
MODEL 2621
Switch set to on LO
Battery
Charger
Battery
+
+
Voltage Monitor
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 2621 MONITORS.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
INSTALLATION
The Model 2621 is a socket-mounted dual set point voltage
monitor. The pin configuration diagram on the unit shows the
contacts in the power OFF, or tripped condition.
Connect the wiring to the socket as shown in the Typical
Application diagram. Observe the proper polarity of the
input voltage for DC models.
ADJUSTMENT PROCEDURE
When adjusting the Model 2621 you may wish to jumper or
disconnect the control circuit contacts to prevent tripping the
load on and off. A variable voltage source and a digital
voltmeter provide the most accurate means of calibrating the
trip point setting.
Set the toggle switch on top of the unit to the desired opera-
tion of the relay. (Relay on at low trip or relay off at low trip)
Rotate the LO TRIP ADJUST to the desired low setting.
Rotate the HI TRIP ADJUST to the desired high setting.
Allow the system to operate. If the unit doesn’t trip at the desired voltage, adjust the HI or LO trip in small increments.
Turn clockwise to raise the trip voltage or counterclockwise to
lower the trip voltage. Do not overlap HI and LO set-points
or unit will remain in a trip condition.
TYPICAL APPLICATION - AC Power
Shows No Power Applied
TYPICAL APPLICATION - DC Power
NOTE: When installing the Model 2621 monitor in areas of
high humidity or contamination, it is recommended that the
base area and all exposed metal parts of the socket be
coated liberally with a good quality silicone grease, such as
Dow Corning DC-4 or DC-4X. Insert the unit into the socket
and wipe off excess grease around the base. This will prevent
the entrance of moisture and other contaminates into the
base and socket areas.
TROUBLESHOOTING
Check that voltage is present and is of the correct level.
Check all fuses, and verify that all wiring connections are
correct. Verify trip and pickup voltages aren’t overlapping.
Should problems persist, contact your local Time Mark
Distributor, or the factory at 800-862-2875 (Monday-Friday; 8
a.m. to 5 p.m.CST), for further assistance.
Sales (800) 862-2875
Main (918) 438-1220
Shows No Power Applied
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.
11440 East P i n e St r e e t
Tuls a , O klaho m a 7411 6
© 2016 TIME MARK CORPORATION
09/2016
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