INSTRUCTION & MAINTENANCE MANUAL
Techtrol Level Controller - "TLC-N"
Techtrol Level Controller TLC-N be used in cojunction with Conductivity type Level Switch to indicate status remotely /
control room. It is available as Panel or Wall mounting (IP 66) with option of Ex-proof Gr IIA & IIB.
Pre Installation Check :
A) Independent Mode :
1) Connect controller "TLC-N" to "Supply" & ensure that its
"LED glows".
2) Connect single wire to terminal "C" of controller and
connect its open end to all the terminals individually (one by
one) and ensure that their. respective "LED" s glow and
relay contacts changeover.
3) The controller is ready for installation on above results
being positive. Pannel
B) Latched Mode:
Latching means, initially if Low level is ON then it remains
ON till High level reaches & vice versa.Initially if controller
is not provided with latching mode, keep the DIP switch
no.2 & 7 in ON condition, however to achieve latching mode
refer following.
1) Power ON the controller, see that GREEN color LED is
glowing.
2) Check the Latching between L1 & L2 level. Wall WP
3) Make the DIP switch combinations as.
4) DIP 1 Switch : 4 & 6 ON
5) See the LED L2 is ON & RL2 is ON
6) Now short the terminals C, 2 & 1 thro' wire, see the LED
L1 & Relay RL1 is ON and LED L2, Relay RL2 turns OFF. L1
remains ON even if we remove the short of C & 1 (L1 level).
Now remove the short of C & 2 also. Now LED L2, Relay
RL2 turns ON and LED L1, Relay RL1 turns OFF.
7) Similarly check Latching between L3 & L4 level by DIP2
Switch : 4 & 6 ON. Ex - Proof
Installation Procedure :
Panel Mounted :
Identify the mounting position & prepare a 68 x 68mm "cutout" on panel. Mount the controller from front & secure it in
place by using fixing clamps.
Wall Mounted :
Mount controller on the identified position ensuring that its surface is flat. Secure it via two mounting holes provided on
enclosure.
Please ensure following:
1. Mounting surface flat & not subjected to vibrations.
2. It is not in close proximity to " high voltage cables", "contactors or drive controls".
3. Should not be mounted in a "confined space" where temperatures may exceed the rated temperature.
4. Outdoor installation must be protected from "direct sunlight" or "server weather conditions".
Front View :
Panel Panel Cutout Wall (W.proof) Mounting Details Wall (Ex proof) Mounting Details
Ø10 x 4 Nos
220 CC 204 Mounting
holes
72 68 142 CC 162
TLC-N Ø7 x 2 Nos
CC 204
LEVEL CONTROLLER Mounting
235
TLC - N holes
LEVEL CONTROLLER PUNE TECHTROL PVT. LTD. PUNE - 26, INDIA
142
72 68 SUPPLY R1 R2 R3 R4
PUNE TECHTROL PVT. LTD. PUNE - 26, INDIA
SUPPLY R1 R2 R3 R4
DETAIL DIMNS
PUNE TECHTROL PVT LTD, PUNE 26, INDIA FOR MOUNTING
Termination & Wiring Daigram :
C 1 2 ...
L N E C 1 2
TLC PANEL
SUPPLY TO LEVEL S/W
L1 L2 ....................................
NO P NC NO P NC
CNS
L1 TLC
LOAD
L2
TLC WALL
L
L N E C 1 2 NO P NC NO P NC
SUPPLY L1 L2 ...........
TO
SWITCH
M
Set the following DIP switch combinations and check FSH, FSL and LATCHING operation in between the level set set
points. FAIL SAFE HIGH or FAIL SAFE LOW can be set through DIP Switches as follows
LED & Relay status
Set Point Cond. Dip Switch Position
PS L1 & RL1 L2 & RL2 L3 & RL3 L4 & RL4
Level 1 FSH DIP 1 SW 8 ON others OFF ON ON -- -- --
Level 1 FSL DIP 1 SW 7 ON others OFF ON OFF -- -- --
Level 2 FSH DIP 1 SW 1 ON others OFF ON -- ON -- --
Level 2 FSL DIP 1 SW 2 ON others OFF ON -- OFF -- --
Level 3 FSH DIP 2 SW 8 ON others OFF ON -- -- ON --
Level 3 FSL DIP 2 SW 7 ON others OFF ON -- -- OFF --
Level 4 FSH DIP 2 SW 1 ON others OFF ON -- -- -- ON
Level 4 FSL DIP 2 SW 2 ON others OFF ON -- -- -- OFF
FSH = Fail safe high, when level reaches at and above high level the Relay & LEDs are OFF
FSL = Fail safe low, when level reaches at and below low level the Relay & LEDs are OFF
Latching of Preset Levels :
Techtrol controller is provided with "8-way DIP Switch" to enable the user to achieve "Latching Mode" Set LATCHING
OPERATION THROUGH DIP SWITCHES as follows,
LED & Relay status
Set Point Dip Switch Position
PS L1 & RL1 L2 & RL2 L3 & RL3 L4 & RL4
L1, L2 DIP 1 SW 4, 6 ON others OFF ON OFF ON -- --
L1, L2 DIP 1 SW 3, 5 ON others OFF ON ON OFF -- --
L3, L4 DIP 2 SW 4, 6 ON others OFF ON -- -- OFF ON
L3, L4 DIP 2 SW 3, 5 ON others OFF ON -- -- ON OFF
Techtrol Level Controller - "TLC-N"
Precautions : (please ensure the following)
" Supply voltage" & "current" in excess of rated capacity will permanently damage the circuit.
Controller is "properly earthed"
In case of Wall mounted version, Enclosure is closed with its protective cover & gasket and there is "NO GAP" between
"CABLE GLAND ID" for weather proofness (IP-65).
In "hazardous locations" do not remove the enclosure cover before disconnecting switch from supply.
The supply wiring should be routed away from the power cable, electromagnetic contactors, power relays & motors
nearby.
Do wiring as per standard electrical code & select proper cable to match connected load.
Switch "ON" the "power supply" only after that all the electrical connections have been completed.
Periodic Maintenance :
1) Wipe the probe rod to remove deposits of scaling formed on it. In case, the liquid is highly viscous / contains
floating material, cleaning is done frequently.
2) Tighten terminal screws, spacers in case of probe, if loose.
3) Visually examine internal PCB for any damage, probe sleeving brakage probe rod bend.
4) Close enclosure with its protective cover after maintenance.
5) Controller cleaning from inside for removal of dust or foreign particles.
Trouble Shooting :
Fault / Defect Cause Solution
Level indicating LED's OFF. a) Improper wiring of controller or from a) Rewire correctly as per "terminal wiring"
probe to controller.
b) Improper supply. b) Use correct supply as per specifications.
c) Fuse blown. c) Replace fuse (500 mA).
No change in level / Relay. a) Improper wiring. a) Rewire correctly as per "terminal wiring"
Improper Relay operation. a) DIP switch setting not proper. a) Reset DIP switch.
Repeated blowing of fuse. a) Improper power supply. a) Use correct supply as per specifications.
Fluctuation in supply or due to spike in
supply
b) Metal debris may present inside b) Clean enclosure from inside by using
enclosure compressed air.
Load not getting ON a) Loose connection Improper wiring. a) Tighten wiring.
All dimensions in mm, except specified.
Relay not getting ON. Do proper wiring as per termination.
Check relay function.
Level indicating LED a) Probe short. Check probe insulation :
continuous ON / False a) Visually
signal. b) By meager, between body & particular
probe.
In case of acidic liquid, a) Coating stored on sensing tip of probe. a) Remove coating from sensing tip of
level not sensed. probe
MAN/TLC-N/Rev 00/10-12
