MODEL 2581
3-Phase 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 2581.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
DIMENSIONS - 480V version
INSTALLATION
Mount the Model 2581 3-Phase Monitor on a flat
surface, in a well ventilated area. It should be fastened
in position with a 1/4" bolt, washer and nut (not
included), through the center mounting hole on the unit.
Use 1/4" quick disconnect lugs, or an equivalent, to
connect the 3-phase power to the terminals marked A,
B and C.
Connect the control circuit to the terminals with the
contact markings. A standard wiring diagram is shown
in the TYPICAL APPLICATION drawing.
If the contact does not transfer (LED indicator-On),
check that all phases are present and of the correct
voltage.
If the contact still does not transfer, remove power and
reverse any two of the three phase wires (phase
rotation is reversed). Re-apply power. The contact
should transfer to provide a signal path between
terminals.
TROUBLESHOOTING
Should the Model 2581 Monitor fail to operate properly,
check that all three voltages are present, and are of the
correct voltage level and phase rotation (a Time Mark
Model 108A or 108B Phase Sequence Detector should
be used to verify phase rotation). Check all fuses and
verify that all wiring connections are correct. If
problems persist, contact your local Time Mark
Distributor or the factory for assistance (Monday-Friday,
8 a.m. to 5 p.m. CST).
WARRANTY
The Model 2581 3-Phase Monitor is covered by Time
Mark Corporation’s exclusive 5-Year Unconditional
Warranty. Should this device fail, for any reason, within
five years from the date of purchase, we will repair or
replace it free. Contact the Time Mark Sales
department, Monday through Friday; 8 a.m. to 5 p.m.,
CST, for further details.
PIN DIAGRAM
A
B
C
0.75"
.26“ dia.
typ.
.25" male
quick connect
2.53“
2.53“
1.38"
TIME MARK is a division of
Telephone: Main - (918) 438-1220
Sales - (800) 862-2875
Fax: (918) 437-7584
E-mail: sales@time-mark.com
Internet: http://www.time-mark.com
Doc No. 87A459 12/00
© 2000 TIME MARK CORPORATION
11440 East Pine Street
Tulsa, Oklahoma 74116
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