Time Mark 27 Data Sheet

MODEL 27

TIME MARK is a division o f

True RMS Current

Monitor

 User selectable relay operation

options

 Low or High Trip with independent

delays or disabled

 User programmable

 Can be restored to factory settings

or calibrated using a True RMS
Multimeter in the field

 Model 27SG has silver with gold

flash contacts for low current.

DESCRIPTION

Model 27 True RMS Current Monitor has a display
that shows the current with an accuracy of +/- 0.5%.
The display is updated every second and re-initialized
every 30 seconds.

This unit has a user selectable relay option for High-Low
or DPDT. It can also be user-selected to energize on
fault or de-energize on fault. The user can select
automatic or manual restart on the Model 27. The SG
version of the Model 27 has silver with gold flash
contacts for low current applications.

Model 27 True RMS Current Monitor can be either
calibrated using a True RMS Multimeter or can be
restored to factory defaults in the field.

UL SPECIFICATIONS*

Model 27 and 27SG

Input

AC Current
Range

Amps 5A

Frequency 50/60Hz (400Hz optional with jumper)

DC Power 24 Volts, 2 watts

Output

0.5A - 1200A with External CT

0.5A - 5A at Terminals

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

C300, Pilot Duty

OTHER SPECIFICATIONS

Model 27 and 27SG

Max Voltage on
Current Terminals

Start-up Delay 5 secs. Min. or Automatic reset delay setting

Output Contacts SPDT x 2 10 Amps @ 240VAC

Repeat Accuracy

Reset Type

Expected Relay Life Mech: 10 million operations

Elec: 100,000 min. at rated load

Operating Temp

Humidity Tolerance

Enclosure Material

Mounting

Weight

(to allow for solid lock)

± 0.5 % (fixed conditions)

0-97% w/o condensation

600V

Manual or Automatic

-20°F to +130°F

Lexan 920

Polycarbonate

UL 94 V-0 1.5 mm

UL E45329

DIN Rail 35mm

8.5 oz.

Page 1 of 4 07/2013

© 2013 TIME MARK CORPORATION

TIME MARK is a division o f

MODEL 27

True RMS Current 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 27.

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

THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.

Installation Instructions

INSTALLATION AND SETUP

Controls:
Rotary encoder with switch. Pressing the encoder
switch will display the set points. Pressing the
encoder switch for more than 5 seconds will enter
the setup mode. Pressing switch displays the next
menu item. Holding down the switch during setup
mode will sequence through menus with 1 second
intervals. Rotating the knob clockwise increases
the value and counter-clockwise will decrease
value.

For non-value options, rotating the knob either way
will change the options on the display.

Setup Options: (Press encoder for at least 5
seconds to enter setup)

High current: (Factory Enabled: Set Point = 5A,
5S Delay)

Enable/Disable: (If disabled, set point and delay

are skipped)
Set Range: Low Set + 1% to 1200A in 0.5A steps
High trip delay: 0 to 20.0 seconds in 0.1Sec

steps

Low current: (Factory Enabled: Set Point = 1A,
5S Delay)

Enable/Disable (If disabled set point and delay

are skipped)
Set Range: 1A to High Set -1% in 0.5A steps
Low trip delay: 0 to 20.0 seconds in 0.1Sec steps

Relay operation: (Factory = HI-LO)

Current High/Low option:
Separate High/Low relays
DPDT
Other faults DPDT

Relay operation on fault:

De-energize on fault
Energize on fault

TYPICAL APPLICATION—MONITOR AND CONTROL > 5A

A/C

CURRENT

24VDC MANUAL

RESET

LOW HIGH

NO C NC | NO C NC

TYPICAL APPLICATION—MONITOR AND ALARMS > 5A

Page 2 of 4 07/2013

© 2013 TIME MARK CORPORATION