MODEL 460D
TIME MARK is a division of
Switch-to-Loop
Converter
6 Inputs
4 to 20mA Output
LED Loop Output Indicator
DESCRIPTION
Liquid level controllers generally require a 4-20mA loop
current. The loop current indicates the level of liquid in a
tank or reservoir, and is usually generated by an
expensive pressure transducer or ultrasonic sensor. If
you already have a tank with float switches installed, the
Model 460D Switch-to-Loop Converter allows you to
take advantage of the latest liquid level control, without the
added cost of a transducer.
The Model 460D Converter outputs a specific current
value as each of the six inputs are closed. Current values
are individually adjustable between 4 and 20mA for each
switch input. Up to six switches can be used as inputs to
all liquid level devices accepting a 4-20mA input, such as
Time Mark’s Model 4052.
DIMENSIONS
SPECIFICATIONS
Model 460D
Nominal Voltage 120VAC ±10%
Frequency 50/60 Hz
Power Consumption 9W
Transient Protection 2500 VRMS for 10ms
Switch Current 5mA Max
Switch Voltage 5VDC
Loop Output adjustable 4 to 20mA
Operating Environment -4º to +122º F
Humidity Tolerance 97% w/o condensation
Enclosure Material ABS plastic
Weight 15 oz.
no switches closed = 4mA output
INSTALLATION INSTRUCTIONS
Mount the Model 460D Converter in a panel or suitable
enclosure. Referring to the markings on the unit and the
provided drawings, make the following connections:
OPERATING POWER
Connect the 120VAC to the terminal marked L (line),
N (neutral), G (ground).
SIGNAL INPUT
Make the appropriate connections from the external float
switch inputs (starting at 1 and progressing up to 6 as
needed) and either C (common) terminal. Two common
terminals are provided for convenience.
IMPORTANT: Connect float switches in the correct
order (lowest float switch to lowest numbered input).
*add max. of 1.0” to depth for terminal strips & connectors
11440 Ea s t P in e St r ee t
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© 2016 TIME MARK CORPORATION
MODEL 460D
TIME MARK is a division of
Switch-to-Loop Converter
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 460D.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions (cont’d)
SIGNAL OUTPUT
Connect the 4-20mA OUTPUT from the 460D to the
4-20mA INPUT on the device that the 460D will be
controlling. OBSERVE POLARITY (See + and - on output
connection).
OPERATING INSTRUCTIONS
When an input switch is closed, the output changes to the
corresponding current level. The highest of the 6 input
switches (that is closed) determines the level of current at
the output. If none of the switches are closed, the output is
4mA. The LCD display indicates when input switches are
closed.
During normal operation, the display will show the current
level that is active (Level 1-6). If no level is active, the
display will show Level 0. The second line of the display
will show what the output current level should be (based on
the active level). If no level is active, this will show 4.0mA.
The inputs start with Level 1 and each input will override
the previous input. That is, if Input 6 is active, the output
will be at the value for Level 6 – ignoring all lower
numbered inputs. If Level 2 is active, only level 1 will be
ignored, etc.
To adjust the output levels:
1. Press and hold the switch for about 4 seconds; The
display will show “Setup Mode”
2. Press and hold the switch for about 2 seconds; The
display will show “Set Lvl 1:
Out: x.xmA”
3. Rotate the knob to adjust what the output should be
when level 1 activates
4. Repeat steps 2 & 3 for the remaining switch inputs.
NOTE: All switch inputs do not have to be used. The
highest switch closed (#1 through #6) will determine the
output value.
5. The final screen will show “Repeat Setup” - Pressing the
knob again will repeat the setup menu, starting with
Level 1
To adjust the output levels: (cont’d)
6. Rotate the knob to change the display options:
“Exit No Save” will exit the menu and restore the
previous settings – ignoring the current changes.
“Exit and Save” will exit the menu and save the current
changes as the new settings.
CALIBRATION
Should calibration be required:
1. Remove power from the controller
2. Press and hold the knob
3. Apply power and wait until the controller says
“Cal Output”
4. Release the knob; the display will show 4mA and the
output will/should be 4mA
5. Rotate the knob to adjust the output to be 4mA based on
the meter you are calibrating to.
6. Press and release the knob; the display will change to
20mA and the output will change to 20mA;
7. Rotate the knob to adjust the output to be 20mA based
on the meter you are calibrating to.
WARRANTY
The Model 460D Switch-to-Loop Converter is warranted
to be free from defects in materials and workmanship for
one year. Should this device fail to operate, we will repair
it for one year from the date of purchase. For complete
warranty details, see the Terms and Conditions of Sales
page in the front section of the Time Mark catalog.
11440 Ea s t P in e St r ee t
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© 2016 TIME MARK CORPORATION
MODEL 460D
TIME MARK is a division of
Switch-to-Loop Converter
SIGNAL OUTPUT to MODEL 4042
SIGNAL OUTPUT to MODEL 4082
11440 Ea s t P in e St r ee t
Tu l sa , O k la h oma 7 4 11 6
10/2016 Page 3 of 4
© 2016 TIME MARK CORPORATION
MODEL 460D
TIME MARK is a division of
Switch-to-Loop Converter
TYPICAL APPLICATION - Model 4052
11440 Ea s t P in e St r ee t
Tu l sa , O k la h oma 7 4 11 6
10/2016 Page 4 of 4
© 2016 TIME MARK CORPORATION
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