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TLSA 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 95-264 Vac (Model TLSA-1)
or 11-30 Vdc (Model TLSA-2).
- Simple to install and commission.
- Replaced by Model
QLS Quad Loop Splitter for new applications.
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Description
Why a Loop Splitter
is Needed
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, all other devices will then also lose their 4-20 mA signal.
The TLSA Loop Splitter
Solution
Model TLSA Loop Splitter / Retransmitter solves the problem by
sourcing three independent 4-20 mA
outputs from a single 4-20 mA 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.
A built-in regulated +20V excitation supply can
power a two-wire transmitter on the the input side and sources the three
4-20 mA outputs. Multiple devices can be
connected in series in each output loop, provided that the total resistance
per loop is less than 600 Ohms and output devices do not share the same
ground.
Grounding
Considerations
With Model TLSA, the outputs must be
electrically floating and cannot share the same ground.
This is because the four grounds of the
input and outputs are different and are each referenced by varying amounts
to the high side of the +20V excitation supply.
Use Model QLS Quad Loop
Splitter if the outputs must share the same ground.
Model QLS offers all capabilities of Model TLSA
and more, and is less expensive. It can source up to four (4) independently
adjustable 4-20 mA outputs from a single input. The outputs can share a
common ground. The input and outputs are mutually isolated to ±10V by means
of active circuitry to accommodate differences in local grounds with normal
industrial grounding practices.
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TLSA Principle of
Operation
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Model TLSA powers
three 4-20 mA output loops with independent zero and
span fine adjustments. The
input is compatible with 2 and 3 wire
transmitters.
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Specifications
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Input |
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Input signal level
Input resistance
Excitation voltage |
4-20 mA, 0-10 mA
50 ohms
20 Vdc nominal, 28 mA max |
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Output |
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Number of outputs
Output signal level
Span adjustment
Zero adjustment
Response speed
Isolation
Drive capacity
Accuracy
Tempco |
3
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 |
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Power |
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Supply
voltage
Power consumption
Connectors |
95-264 Vac (Model TLSA-1), 11-30 Vdc
(Model TLSA-2)
3 W max
Plug-in screw terminals |
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Environmental |
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Working temp.
Storage temp.
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 |
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Mechanical |
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Mounting
Dimensions
Weight
Cable dimensions |
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 max
(0.09" diameter, 11 AWG) |
Ordering
Guide
TLS Triple Output 4-20 mA Loop Splitter
/ Retransmitter
Click on the radio buttons to build a model number with pricing (shown below the Ordering Guide).
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