Laurel Electronics for Digital Panel Meters, Counters, Timers, Transmitters, Digital Displays

Digital Panel Meters - Counters - Timers
DIN Rail Transmitters - Large Digit Displays

   

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Model TLS
Triple Output 4-20 mA Current Loop Splitter / Retransmitter

Features
  

  • Splits one 4-20 mA input loop into three independently scalable 4-20 mA output loops.
  • Device removal or failure in any output loop will not affect other loops.
  • Powers 2-wire transmitters at 20 Vdc.
  • Independent zero and span controls for each output loop.
  • Mounts on 35 mm DIN rail.
  • Only 22.5 mm (0.9") wide.
  • Powered by 95-265 Vac (Model TLS1)
    or 11-30 Vdc (Model TLS2).
  • Simple to install and commission.

 
Description

In many industrial systems, the same 4-20 mA signal from a transmitter is sent to multiple devices in series, such as panel meters, chart recorders and PLCs, as shown below. When any device in the loop is removed, fails, or suffers a wiring fault, as all other devices will then also lose their 4-20 mA signal.
  

4-20 mA process loop with three devices in series in loop.

Model TLS Loop Splitter / Retransmitter solves the problem by generating three independent 4-20 mA outputs from a single 4-20mA input. This allows three separate remote devices to be independently fed from one signal. If any output device is removed or fails, the other devices will continue to operate properly.

Each output loop has its own zero and span controls to allow individual scaling. An unregulated 24 Vdc excitation output is provided to power a 2-wire transmitter device, such as a pressure transmitter. Multiple devices can be connected in series in each output loop, provided that the total resistance per loop is less than 600 Ohms. All output signals share the same ground. The input and output signals are fully isolated from power and ground.
 

4-20 mA process loop with three devices in parallel in loop, made possible by Model TLS loop splitter / retransmitter.

Several improvements are offered by the new Model TLS (P/N TIM018) over the predecessor Model TLS:

  • Narrower case, only 22.5 mm (0.9") wide, allows denser packing.

  • Wide-range switching power supplies cover 95-265 Vac (Model TLS1) or 11-30 Vdc (Model TLS2), compared to the previous 120 or 230 Vac.

  • Adjustments from front panel.

  • Detachable screw terminal connectors.

  • All loops load-isolated, so that a problem in any one loop won't affect the other loops.

Specifications

Input
Input signal
Input resistance
Excitation voltage
4-20 mA, 0-10 mA
50 ohms
20 Vdc nominal, 28 mA max
Output
Output signal
Span adjustment
Zero adjustment 
Response speed
Isolation
Drive capacity
Accuracy
Tempco
4-20 mA, 0-10 mA
± 9 mA
± 1 mA
200 ms
380V to earth and power (output terminals internally connected)
600 ohms per loop at 20 mA
± 0.1% of span
± 75 ppm/ºC
Power
Supply voltage, Model TLS1
Supply voltage, Model TLS2
Power consumption
Connectors

95-265 Vac
11-30 Vdc
3 W max
Screw terminals - plug in

Environmental
Working temperature
 
 
Storage temperature
Humidity
Case sealing
0 to 50ºC (32 to 122ºF), single unit natural ventilation
0 to 40ºC (32 to 104ºF), two stacked units, natural ventilation
0 to 35ºC (32 to 95ºF), three stacked units, natural ventilation
-20 to +75ºC (-4 to 167ºF)
0-90% RH, non-condensing
IP40
Mechanical
Mounting
Dimensions
Weight
Cable dimensions, max
35-mm DIN Rail per EN50 022
22.5 x 99 x 111 mm (0.9" x 3.9" x 4.4") W x H x D
200 g (7 oz)
4 sq. mm
(0.09" diameter, 11 AWG)

Ordering Guide
TLS Triple Output 4-20 mA Loop Splitter / Retransmitter

TLS1

Triple Output Loop Splitter Retransmitter, 95-265 Vac power

$255

TLS2

Triple Output Loop Splitter Retransmitter, 11-30 Vdc power $280
 
Laurel Electronics domestic orders Order from distributors for shipment to USA or Canada.
Laurel Electronics international orders Order online for international shipment.

 

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Laurel Electronics, Inc.
Industrial Instrumentation & Displays
3183-G Airway Avenue
Costa Mesa, CA 92626, USA
Phone: (714) 434-6131
Fax:
     (714) 434-3766

  
© 1996-2008 Laurel Electronics, Inc.