Bulletin No. TLA-B
Drawing No. LP0553
Released 06/13
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net
MODEL TLA - TEMPERATURE LIMIT ALARM
FM APPROVED, UL RECOGNIZED
2-LINE BY 4-DIGIT DISPLAY
EXCEED, OUTPUT, AND ALARM ANNUNCIATORS
FOUR BUTTON SILICONE RUBBER KEYPAD
THERMOCOUPLE OR RTD SENSOR INPUT
REMOTE RESET INPUT
MAIN LIMIT OUTPUT: 5A RELAY. SELECTABLE FOR HIGH OR
LOW TRIP ACTIVATION
OPTIONAL ALARMS: 5A RELAY(S)
OPTIONAL NEMA 4X/IP65 SEALED FRONT BEZEL
PARAMETER SECURITY VIA PROGRAMMABLE LOCKOUTS
FM
APPROVED
PROCESS CONTROL EQUIPMENT
UL Recognized Component,
File # E156876
GENERAL DESCRIPTION
The TLA is a Factory Mutual approved temperature limit alarm, intended to
provide an independent shutdown for thermal processes. The TLA accepts
signals from a variety of temperature sensors (thermocouple or RTD elements),
and its comprehensive programming allows it to meet a wide variety of
application requirements.
Dual 4-digit displays allow viewing of the process temperature and limit
setpoint simultaneously. Front panel indicators inform the operator of the
process and output status. The main limit output and alarm outputs are field
replaceable.
The limit output is selectable for high or low trip activation. If the process
temperature goes above the limit setpoint for a high trip, or below the limit
setpoint for a low trip, the limit relay will de-energize to initiate a process
shutdown. The limit output cannot be reset until the process temperature returns
to the proper operating range; manual reset is required (local or remote). Sensor
failure will initiate a process shutdown.
Relay alarm(s) can be configured to activate according to a variety of actions
(Absolute HI or LO, Deviation HI or LO, and Band IN or OUT) with adjustable
hysteresis. A standby feature suppresses the alarm during power-up until the
process stabilizes outside the alarm region.
The unit is constructed of a lightweight, high impact plastic case with a tinted
front panel. The front panel meets NEMA 4X/IP65 specifications when properly
installed. Multiple units can be stacked horizontally or vertically. Modern
surface-mount technology, extensive testing, plus high immunity to noise
interference makes the TLA extremely reliable in industrial environments.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Do not use the TLA to directly command motors, valves, or other actuators
not equipped with safeguards. To do so can be potentially harmful to persons or
equipment in the event of a fault to the unit.
CAUTION: Risk of Danger.
Read complete instructions prior to
installation and operation of the unit.
CAUTION:
Risk of electric shock.
DIMENSIONS In inches (mm)
PANEL CUT-OUT
EX OUT A1 A2
R
P
1.95
(49.5)
1.772
+0.024
-0.000
(45
+0.6
)
-0.0
1.95 (49.5)
0.37
(9.4)
4.17 (105.9)
1.772
-0.000
(45
+0.6
)
-0.0
+0.024
1
GENERAL SPECIFICATIONS
1.
DISPLAY:
2 line by 4-digit LED
Upper (Main) Display:
0.4" (10.2 mm) high red LED
Lower (Secondary) Display:
0.3" (7.6 mm) high green LED
Display Messages:
“OLOL” - Appears when measurement exceeds + sensor range.
“ULUL” - Appears when measurement exceeds - sensor range.
“OPEN” - Appears when open sensor is detected.
“SHrt” - Appears when shorted sensor is detected (RTD only)
“...” - Appears when display values exceed + display range.
“-..” - Appears when display values exceed - display range.
LED Status Annunciators:
EX - Temperature exceeds limit setpoint
OUT - Limit output is de-energized
A1 - Alarm #1 is active
A2 - Alarm #2 is active
2.
POWER:
Line Voltage Models:
85 to 250 VAC, 50/60 Hz, 8 VA.
Low Voltage Models:
DC Power:
18 to 36 VDC, 7 W.
AC Power:
24 VAC +/-10%, 50/60 Hz, 9 VA
3.
CONTROLS:
Four rubber push buttons: R, P, Up, Down
4.
MEMORY:
Nonvolatile E
2
PROM retains all programmable parameters and
values.
5.
ENVIRONMENTAL CONDITIONS:
Operating Range:
FM rated @ 0 to 65°C, UL rated @ 0 to 55°C
Storage Range:
-40 to 80°C
Operating and Storage Humidity:
85% max. relative humidity (non-
condensing) from 0°C to 65°C.
Vibration to IEC 68-2-6:
Operational 5 to 150 Hz, 2 g.
Shock to IEC 68-2-27:
Operational 20 g (10 g relay).
Altitude:
Up to 2000 meters
6.
ISOLATION BREAKDOWN RATINGS:
AC line with respect to all inputs and outputs:
2300 V for 1 minute (250
V working)
Relay contacts to all other inputs and outputs:
2300 VAC
DC Power with respect to sensor input:
50 V working (500 V for 1 minute)
7.
CERTIFICATIONS AND COMPLIANCES:
CE Approved
EN 61326-1 Immunity to Industrial Locations
Emission CISPR 11 Class A
IEC/EN 61010-1
RoHS Compliant
Factory Mutual (FM) Listed: File #3014646
UL Recognized Component: File #E156876
Type 4X Enclosure rating (Face only)
IP65 Enclosure rating (Face only)
IP20 Enclosure rating (Rear of unit)
Refer to EMC Installation Guidelines section of the bulletin for additional
information.
8.
CONNECTION:
Wire clamping screw terminals
Wire Gage Capacity:
Two 14 AWG (2.55 mm), four 18 AWG (1.02 mm), or
four 20 AWG (0.61 mm).
Terminal Torque:
1.0Nm (8.9 in-lbs.).
1.4Nm (12.4 in-lbs.) max.
9.
CONSTRUCTION:
Black plastic alloy case and collar style panel latch.
Panel latch can be installed for vertical or horizontal instrument stacking.
One piece tinted plastic bezel. Bezel assembly with circuit boards can be
removed from the case to change the output board without removing the case
from the panel or disconnecting wiring. Unit meets NEMA 4X/IP65
requirements for indoor use, when properly installed. Flame resistant.
Installation Category II, Pollution Degree 2.
10.
WEIGHT:
0.38 lbs (0.17 kgs)
INPUT SPECIFICATIONS
1.
SENSOR INPUT:
Sample Period:
100 msec
Step Response Time:
Less than 300 msec typ., 400 msec max. (to within
99% of final value)
Normal Mode Rejection:
Greater than 40 dB @ 50/60 Hz
Common Mode Rejection:
Greater than 120 dB, DC to 60 Hz
Overvoltage Protection:
Input overload 120 VAC for 15 seconds max.
2.
Failed Sensor Response:
Main Output:
Sensor failure will initiate a process shutdown
Display:
“OPEN”
Alarms:
Upscale
3.
INDICATION ACCURACY:
±(0.3% of Span +1°C) at 23°C ambient after
20 minute warm-up. (Includes NIST conformity, cold junction effect, A/D
conversion errors and linearization conformity.
Span Drift (maximum):
130 PPM/°C
4.
RTD INPUT:
2 or 3 wire, 100
Ω
platinum, alpha = 0.00385 (DIN 43760),
alpha = 0.0039162
Excitation:
150 µA typical
Resolution:
1 or 0.1 degree
Lead Resistance:
15
Ω
max. per input lead
RTD TYPE
RANGE
5.
THERMOCOUPLE INPUT:
Types:
T, E, J, K, R, S, B, N, Linear mV, software selectable
Input Impedance:
20 MΩ all types
Lead resistance effect:
0.25 µV/Ω
Cold junction compensation:
Less than ±1°C typ., (±1.5°C max), error over
0 to 65°C max. ambient temperature range. Defeated for Linear mV
indication mode.
Resolution:
1° for all types, or 0.1° for T, E, J, K, and N onlY.
TC TYPE
RANGE
WIRE COLOR
ANSI
BS 1843
T
E
J
K
R
S
B
N
mV
385
392
OHMS
-200 to +600°C
-328 to +1100°F
-200 to +600°C
-328 to +1100°F
2.0 to 320.0
-200 to +400°C
-328 to +752°F
-200 to +750°C
-328 to +1382°F
-200 to +760°C
-328 to 1400°F
-200 to +1250°C
-328 to +2282°F
0 to 1768°C
+32 to +3214°F
0 to 1768°C
+32 to 3214°F
+149 to +1820°C
+300 to +3308°F
-200 to +1300°C
-328 to +2372°F
-5.00 to +56.00
blue (+)
white (+)
red (-)
blue (-)
violet (+)
brown (+)
red (-)
blue (-)
white (+)
yellow (+)
red (-)
blue (-)
yellow (+)
brown (+)
red (-)
blue (-)
black (+)
white (+)
red (-)
blue (-)
black (+)
white (+)
red (-)
blue (-)
grey (+)
no standard
red (-)
orange (+)
orange (+)
red (-)
blue (-)
no standard no standard
6.
REMOTE RESET INPUT:
Internally pulled up to +5 VDC (1MΩ).
V
IL
: 0.85 V max., V
IH
: 3.65 V min., V
IN
MAX: 5.25 VDC, I
OFF
: 1µA max.
2
OUTPUT SPECIFICATIONS
1.
LIMIT AND ALARM OUTPUT RELAYS:
Contact Rating:
5 A @ 250 VAC or 30 VDC (resistive load).
Life Expectancy:
100,000 cycles at max. load rating. (Decreasing load
increases life expectancy.)
2.
LIMIT OUTPUT:
TLA21000: Form-C relay; TLA11100: Form-A relay.
Selectable for high or low trip activation. If the process temperature goes
above the limit setpoint for a high trip, or below the limit setpoint for a low
trip, the limit relay will de-energize to initiate a process shutdown. The limit
output cannot be reset until the process temperature returns to the proper
operating range; manual reset is required (local or remote).
Annunciators:
“EX” - Lit when the process temperature exceeds the limit setpoint.
“OUT” - Lit when the limit output is de-energized.
3.
ALARM OUTPUTS (Optional):
One or two Form-A relays.
Modes:
Absolute High Acting
Absolute Low Acting
Deviation High Acting
Deviation Low Acting
Inside Band Acting
Outside Band Acting
Reset Action:
Programmable; automatic or latched. Latched alarms can be
reset regardless of limit exceed condition.
Standby Mode:
Programmable; enable or disable.
Hysteresis:
Programmable.
Annunciator:
“A1” and “A2” programmable for normal or reverse acting.
ORDERING INFORMATION
85 to 250 VAC
LIMIT OUTPUT
ALARM 1 OUTPUT
ALARM 2 OUTPUT
REPLACEMENT
OUTPUT BOARD
PART NUMBERS
Form-C Relay
Form-A Relay
Form-A Relay
Form-A Relay
Form-A Relay
RBDLA210
RBD48111
TLA21000
TLA11100
18 to 36 VDC / 24 VAC
LIMIT OUTPUT
ALARM 1 OUTPUT
ALARM 2 OUTPUT
REPLACEMENT
OUTPUT BOARD
PART NUMBERS
Form-C Relay
Form-A Relay
Form-A Relay
Form-A Relay
Form-A Relay
RBDLA210
RBD48111
TLA21010
TLA11110
EMC INSTALLATION GUIDELINES
Although Red Lion Controls Products are designed with a high degree of
immunity to Electromagnetic Interference (EMI), proper installation and wiring
methods must be followed to ensure compatibility in each application. The type
of the electrical noise, source or coupling method into a unit may be different
for various installations. Cable length, routing, and shield termination are very
important and can mean the difference between a successful or troublesome
installation. Listed are some EMI guidelines for a successful installation in an
industrial environment.
1. A unit should be mounted in a metal enclosure, which is properly connected
to protective earth.
2. Use shielded cables for all Signal and Control inputs. The shield connection
should be made as short as possible. The connection point for the shield
depends somewhat upon the application. Listed below are the recommended
methods of connecting the shield, in order of their effectiveness.
a. Connect the shield to earth ground (protective earth) at one end where the
unit is mounted.
b. Connect the shield to earth ground at both ends of the cable, usually when
the noise source frequency is over 1 MHz.
3. Never run Signal or Control cables in the same conduit or raceway with AC
power lines, conductors, feeding motors, solenoids, SCR controls, and
heaters, etc. The cables should be run through metal conduit that is properly
grounded. This is especially useful in applications where cable runs are long
and portable two-way radios are used in close proximity or if the installation
is near a commercial radio transmitter. Also, Signal or Control cables within
an enclosure should be routed as far away as possible from contactors,
control relays, transformers, and other noisy components.
4. Long cable runs are more susceptible to EMI pickup than short cable runs.
5. In extremely high EMI environments, the use of external EMI suppression
devices such as Ferrite Suppression Cores for signal and control cables is
effective. The following EMI suppression devices (or equivalent) are
recommended:
Fair-Rite part number 0443167251 (RLC part number FCOR0000)
Line Filters for input power cables:
Schaffner # FN2010-1/07 (Red Lion Controls # LFIL0000)
6. To protect relay contacts that control inductive loads and to minimize radiated
and conducted noise (EMI), some type of contact protection network is
normally installed across the load, the contacts or both. The most effective
location is across the load.
a. Using a snubber, which is a resistor-capacitor (RC) network or metal oxide
varistor (MOV) across an AC inductive load is very effective at reducing
EMI and increasing relay contact life.
b. If a DC inductive load (such as a DC relay coil) is controlled by a transistor
switch, care must be taken not to exceed the breakdown voltage of the
transistor when the load is switched. One of the most effective ways is to
place a diode across the inductive load. Most RLC products with solid
state outputs have internal zener diode protection. However external diode
protection at the load is always a good design practice to limit EMI.
Although the use of a snubber or varistor could be used.
RLC part numbers: Snubber: SNUB0000
Varistor: ILS11500 or ILS23000
7. Care should be taken when connecting input and output devices to the
instrument. When a separate input and output common is provided, they
should not be mixed. Therefore a sensor common should NOT be connected
to an output common. This would cause EMI on the sensitive input common,
which could affect the instrument’s operation.
Visit RLC’s web site at http://www.redlion.net/Support/InstallationConsiderations.
html for more information on EMI guidelines, Safety and CE issues as they
relate to Red Lion Controls products.
3
1.0 INSTALLING THE TLA
The TLA meets NEMA 4X/IP65 requirements for indoor use to provide a
watertight seal in steel panels with a minimum thickness of 0.09 inch, or
aluminum panels with a minimum thickness of 0.12 inch. The units are intended
to be mounted into an enclosed panel. It is designed so that the units can be
stacked horizontally or vertically. The bezel assembly
MUST
be in place during
installation of the unit.
2.39 (60.7)
MAX.
1
2
3
4
5
13
14
6
7
8
9
10
1
2
1.96 (49.8)
MAX.
13
14
6
7
8
9
10
Instructions:
1.96 (49.8)
MAX.
3
4
5
2.39 (60.7)
MAX.
1. Prepare the panel cutout to the dimensions.
2. Remove the panel latch from the unit. Discard the cardboard sleeve.
3. Carefully remove the center section of the panel gasket and discard. Slide
the panel gasket over the unit from the rear, seating it against the lip at the
front of the case.
4. Insert the unit into the panel cutout. While holding the unit in place, push the
panel latch over the rear of the unit, engaging the tabs of the panel latch in
the farthest forward slot possible.
5. To achieve a proper seal, tighten the
panel latch screws evenly until the
unit is snug in the panel, torquing
1.772
+0.024
the screws to approximately 7 in-lbs
-0.000
(79 N-cm). Over tightening can
result in distortion of the panel, and
(45
+0.6
)
-0.0
reduce the effectiveness of the seal.
Note: The installation location of the
TLA is important. Be sure to keep it
away from heat sources (ovens,
furnaces, etc.), and away from
1.772
+0.024
direct contact with caustic vapors,
-0.000
oils, steam, or any other process
byproducts in which exposure may
(45
+0.6
)
-0.0
affect proper operation.
11
12
11
12
PANEL LATCH INSTALLED FOR
VERTICAL UNIT STACKING
PANEL LATCH INSTALLED FOR
HORIZONTAL UNIT STACKING
PANEL GASKET
BEZEL
PANEL
PANEL
MOUNTING
SCREW
LATCHING
SLOTS
LATCHING
TABS
PANEL LATCH
Multiple Unit Stacking
The TLA is designed for close spacing of multiple units. Units can be stacked
either horizontally or vertically. For vertical stacking, install the panel latch with
the screws to the sides of the unit. For horizontal stacking, the panel latch
screws should be at the top and bottom of the unit. The minimum spacing from
center line to center line of units is 1.96" (49.8 mm). This spacing is the same
for vertical or horizontal stacking.
1.96 (49.8)
MIN.
EB
078
3
PANEL
CASE
LIP
STANDARD
PANEL
CUT-OUT
R
P
PRY
SLOT
IF NEMA 4 IS NOT REQUIRED,
THIS PANEL MATERIAL MAY BE REMOVED.
BEZEL
slot on either side of the unit. Twist the screwdriver handle until the unit is
ejected enough to allow removal.
Caution: The bezel assembly contains electronic circuits that can be damaged
by static electricity. Before removing the assembly, discharge static charge on
your body by touching an earth ground point. It is also important that the
bezel assembly be handled only by the bezel itself. Additionally, if it is
necessary to handle a circuit board, be certain that hands are free from dirt,
oil, etc., to avoid circuit contamination that may lead to malfunction. If it
becomes necessary to ship the unit for repairs, place the unit in its case
before shipping.
Note: When stacking units, provide adequate panel ventilation to ensure that
the maximum operating temperature range is not exceeded.
Caution: Disconnect power to the unit and to the output control
circuits to eliminate the potential shock hazard when removing the
bezel assembly.
Unit Removal Procedure
To remove a unit from the panel, first loosen the panel latch screws. Insert
flat blade screwdrivers between the latch and the case on either side of the unit,
so that the latches disengage from the grooves in the case. Push the unit through
the panel from the rear.
Installing Bezel Assembly
Removing Bezel Assembly
The bezel assembly must be removed from the case to replace the output
board. To remove the bezel assembly, insert a flat blade screwdriver into the pry
4
To install the bezel assembly, insert the assembly into the case until the bezel
is fully seated against the lip of the case. Properly installing the bezel assembly
is necessary for watertight sealing.
2.0 WIRING THE TLA
After the unit has been mechanically mounted, it is ready to be wired. All
wiring connections are made to the rear screw terminals. When wiring the unit,
use the numbers on the label and those embossed on the back of the case, to
identify the position number with the proper function.
All conductors should meet voltage and current ratings for each terminal.
Also cabling should conform to appropriate standards of good installation, local
codes and regulations. It is recommended that power supplied to the unit (AC
or DC) be protected by a fuse or circuit breaker. Strip the wire, leaving
approximately 1/4" (6 mm) bare wire exposed (stranded wires should be tinned
with solder). Insert the wire under the clamping washer and tighten the screw
until the wire is clamped tightly.
Caution: Unused terminals are NOT to be used as tie points. Damage to the TLA
may result if these terminals are used.
RTD
POWER WIRING
AC Power
Primary AC power is connected to terminals #11 and #12, labeled AC. To
reduce the chance of noise spikes entering the AC line and affecting the TLA,
an AC feed separate from that of the load should be used to power the TLA. Be
certain that the AC power to the TLA is relatively “clean” and within the
variation limit. Connecting power from heavily loaded circuits or circuits that
also power loads that cycle on and off (contacts, relays, motors, etc.), should be
avoided.
When connecting the RTD, be certain that the connections are clean and
tight. RTD sensors have a higher degree of accuracy and stability than
thermocouple sensors. Most RTD sensors available are the three wire type. The
third wire is a sense lead for canceling the effects of lead resistance of the probe.
Four wire RTD elements may be used by leaving one of the sense leads
disconnected. Two wire RTD sensors may be used in either of two ways:
A) Attach the RTD to terminals #8 and #10. Install a copper sense wire of the
same wire gauge as the RTD leads. Attach one end of the wire at the probe
and the other end to terminal #9. Complete lead wire compensation is
obtained. This is the preferred method.
B) Attach the RTD to terminals #8 and #10. Install a shorting wire between
terminals #9 and #10. A temperature offset error of 2.5°C/ohm of lead
resistance exists. The error may be compensated by programming a
temperature offset.
Note: With extended cable runs, be sure the lead resistance is less than 15 ohms/
lead.
USER INPUT
DC Power
DC Power (18 to 36 VDC) is connected to terminals #11 and #12 labeled
DC+ and DC- respectively.
CAUTION: Observe proper polarity when connecting DC voltages.
Damage to the unit may occur if polarity is reversed.
POWER
COMM.
RTD
PROBE
RTD
SIGNAL WIRING
Thermocouple
When connecting the thermocouple, be certain that the connections are clean
and tight. If the thermocouple probe cannot be connected directly to the TLA,
thermocouple wire or thermocouple extension-grade wire must be used to
extend the connection points (copper wire does not work). Always refer to the
thermocouple manufacturer’s recommendations for mounting, temperature
range, shielding, etc. For multi-probe temperature averaging applications, two
or more thermocouple probes may be connected to the TLA (always use the
same type). Paralleling a single thermocouple to more than one TLA is not
recommended. Generally, the red wire from the thermocouple is negative and
connected to the TLA’s common.
USER INPUT
RTD Connection
RELAY CONNECTIONS
To prolong contact life and suppress electrical noise interference due to the
switching of inductive loads, it is good installation practice to install a snubber
across the contactor. Follow the manufacturer's instructions for installation.
5 AMPS
AT
250 VAC
N.C.
N.O.
*
*
*
LOAD
FUSE
CONTROLLER
-
COMM.
TC
+
AC/DC
POWER
Note: Snubber leakage current can cause some electromechanical devices to be
held ON.
*Terminal numbers are model dependent. See Terminal Configurations for
description.
NO
CONNECTION
POWER
REMOTE RESET WIRING
Thermocouple Connection
The use of shielded cable is recommended. Follow the EMC installation
guidelines for shield connection.
Terminal #6 is the Remote Reset. Any form of mechanical switch may be
connected to terminal #6 (REMOTE RESET) and terminal #8 (COMM.).
Sinking open collector logic with less than 0.7 V saturation and off-state leakage
current of less than 1 µA may also be used.
5
Analogue and Mixed Signal
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