Twin Link Wireless Transmitter Receiver

Twin Link Wireless Transmitter Receiver

Wireless Analog Signal Transmitter Receivers. Easily Transmit Signals up to 2.5 miles* (sold as pair)

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What it does

Wirelessly transmits signals from point to point. Accepts 2 inputs from a range popular signal types and outputs 2x 4-20mA.

Transmit signals up to 2.5 miles*

When it’s just too far or too expensive to lay cable for signal communications, turn to Define Instruments Twin Link units. Twin Link uses wireless technology to communicate to and control devices over distances of up to 2.5 miles with Line Of Sight (*requires 12db aerial).

Reach can be extended beyond this distance with the addition of a repeater unit. Repeater units can also be used to transmit around RF obstacles when line of sight is obscured.

Out-of-the-box ready for 4-20mA I/O applications

The pre-paired Point to Point units come “out of the box ready” for 4-20mA I/O applications but additionally can accept a huge variety of input types including mA, RTD and Frequency. Twin Link boasts 2 analog inputs plus 4 digital I/O switches. Channels are fully isolated and units are industrial strength.

Transmits through walls

The Twin Link will transmit through stud walls, brick and concrete, so if you need to get signals a few rooms away or up a floor or two, Twin Link can handle it. In interior applications range is 300-500ft through typical buildings and building materials.

Easy 60 second set up

Twin Link connects to a PC via USB – cutting configuration time to a mere 60 seconds.

Saves money

As Twin Link can be used to both transmit and control, it reduces costs by removing the need for separate units.

License Free Frequency bands

Twin Link runs at 2.4Ghz license free and FCC approved for US. Power output 20dBm / 100mW.

Try Before You Buy!

Use the product simulator inside our free ToolBox software to demo how this instrument works.

Bridge Key Required!

In addition to this software a Bridge Key is required for the configuration of this product.

You must order one unless you already have one from a previous product purchase.

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Everything You Need:

  • Input Node (P2P-I) 2x universal isolated analog input channels accepting Thermocouple, RTD, Process inputs (current & voltage), NPN/PNP open collectors, Potentiometer input, and AC current sensors
  • Output Node (P2P-O) 2x 4-20mA isolated analog outputs that are easy to scale to your desired range
  • Flexible IO Each of the Twin Link units also offers 4 digital inputs, 2 digital outputs, and 2 relay outputs, which are simple to program for a range of setpoint functions.

Simple Setup Using Your PC

Setting up your wireless Point-to-Point system is fast and easy with Define ToolBox. Simply connect the Twin Link Input Node (P2P-I) to your PC via USB (Bridge Key required), and you’ll be up and running in no time.

Select from a wide range of pre-calibrated input types, easily scale your analog outputs, and configure your IOs for mimicking, alarms, and sophisticated remote control of other equipment.

Dynamic Help Panel
5 Year WarrantyR-NZ E2180CEFCC 2ACTT-1409


Universal Input

Number of universal inputs: 2x isolated universal input channels (Input node)


RF data rate: 250Kb/s

RF frequency range: 2405-2475MHz

RF transmission power: +20dBm (10dBm selectable in soft ware for regions with transmission power restrictions)

Transmission range: Up to 0.9mi (1.5km) LOS with supplied antenna (WG-3DBI). 2.5miles with 12db aerial.

All nodes must be set to full power (+20dBm) for max range. Transmission distance may be limited by regional power restrictions. In this case one or more Repeaters may be needed for your application.

RF receiver sensitivity: -110dBm

Number of RF channels: 15

Number of wireless nodes: Up to 17 nodes per mesh (Twin Link plus up to 15 Repeaters)

Spreading method: Direct sequence

Modulation: O-QPSK


Power supply: 9–36V DC, 2.5VA max

Isolation: 1500V AC between power supply and input or output channels

Thermocouple Input

Thermocouple types:

J: -328 to 1832°F (-200 to 1000°C)

K: -328 to 2300°F (-200 to 1260°C)

B: 752 to 3272°F (400 to 1800°C)

E: -328 to 1292°F (-200 to 700°C)

N: -328 to 2372°F (-200 to 1300°C)

R: 32 to 3092°F (0 to 1700°C)

S: 32 to 3092°F (0 to 1700°C)

T: -328 to 752°F (-200 to 400°C)

Input impedance: >500KΩ min

T/C lead resistance: 100Ω max

Cold junction compensation: 14 to 140°F (-10 to 60°C)

CJC error: <0.02°c typical for all dd>

Accuracy: 0.1% of FSO±1°C typical

Sensor open: Upscale

RTD Input

RTD input type: 3-wire RTD PT100 (DIN 43760:1980) or PT1000 (3-wire RTD standard)

Calibrated ranges: -328 to 572°F (-200 to 300°C), 0.01°C res; -328 to 1472°F (-200 to 800°C), 0.1°C res

Lead wire resistance: 10Ω/lead max recommended

Sensor current: 0.6mA continuous

Sensor fail: Upscale

Accuracy: (32–572°F) 0–300°C= ±0.1°C; (32–1472°F) 0–800°C= ±0.3°C

Ambient drift: 0.003°C/C typical

Current Input

Range: 0/4–20mA

Input impedance: 45Ω

Max over-range: Protected by PTC to 24V DC

Linearity & repeatability: 0.1% FSO max

Accuracy: 0.1% FSO max

Channel separation: 0.001% max

Ambient drift: <50ppm °c of fs dd>

Response time: 100msec

Voltage Input

Ranges: ±200mV, –200mV to 1V, 0–10V, 0–18V

Input impedance: 500KΩ (all ranges)

Maximum over voltage: 24V DC

Linearity & repeatability: 0.05% FSO max

Accuracy: 0.1% FSO max

Channel separation: 0.001% max

Ambient drift: 0.003%/°C

Digital Pulse Input

Frequency range: 0–2500Hz

Sensors: Open collector (NPN, PNP)

Frequency resolution: 0.1Hz

Software modes: General frequency, Flow rate, or RPM

Accuracy: ±0.5%

AC Current Sensor Input

Sensor type: Current transformer (ACCS-420/ACCS-010)

Amperage range: Header selectable 100/150/200A

Overload: 175/300/400A respectively (continuous)

Output: (Representing 0–100% of full scale input range) ACCS-420 = 4–20mA DC loop powered ACCS-010 = 0–10V DC

Power supply: ACCS-420: Loop powered, 15–36V DC ACCS-010: Self powered

Accuracy: 1% of full scale

Response time: 250ms (10–90%)

Isolation voltage: 2000V

Frequency: 50–60Hz

Potentiometer Input

Potentiometer input: 3-wire

Excitation voltage: Variable

Potentiometer resistance: Low range (<2kω) or high range>2kΩ)

Field programmable zero: 0–90% of span

Field programmable span: 0.1–100%

Linearity & repeatability: <±0.05% fso dd>

Response time: 100msec

Ambient drift: <50ppm dd>

Relay Output

Number of relay outputs: 2 x relay outputs on each Twin Link node

Relay output type: Form A (5A 250V AC / 5A 30V DC)

Isolation: Isolated to sensor and user input commons

Isolation test voltage: 2300Vrms for 1min. Working voltage 250V AC

Life expectancy: 100K cycles min at full load rating

Analog Output (Retransmission)

Number of analog outputs: 2 x analog outputs (Output node)

Analog output type: Loop powered, isolated 4–20mA or 20–4mA DC

Isolation: Isolated to Digital IO GND

Isolation test voltage: 1400Vrms for 1min. Working voltage 125V DC

Resolution: 15 bits, 16000 steps

Loop drop: 10V max

Linearity & repeatability: 0.1% FSO max

Accuracy: 0.1% FSO max

Digital I/O

Digital inputs: 4 x digital inputs on each Twin Link node Max rate 1Hz. Selectable sink/source. Suitable for clean contacts, NPN, PNP and voltage inputs (low input <1.4v dc, high input 1.4–30v

Max continuous input: 30V DC

Isolation: Not isolated to power supply common

Digital outputs: 2 x digital outputs on each Twin Link node Open drain (1A, 30V DC max)


USB programmable: Simple programming using Define ToolBox. Requires Bridge Key (sold separately).

Protocols: Modbus RTU

Serial data rate: 9600 baud, 8-N-1

Environmental Conditions

Casing: 35mm DIN rail mount casing. Installation Category II; Pollution Degree 2; Flame resistant

Ingress protection rating: IP20 – install in a protective enclosure

Dimensions (H x W x D): Unit body: 3.98 x 0.91 x 4.72″ (101 x 23 x 120mm) With included antenna: 5.91 x 0.91 x 5.75″ (150 x 23 x 146mm)

Weight: 5.5oz (156g) with included antenna and plugs

Environmental Conditions

Operating temperature: -4 to 131°F (-20 to 55°C)

Storage temperature: -4 to 149°F (-20 to 65°C)

Operating humidity: 0–85% non-condensing

Altitude: 2187yd (2000m)

Certifications & Compliances

FCC ID: 2ACTT-1409: 47 Code of Federal Regulations; Part 15 – Radio Frequency Devices; Subpart C – Intentional Radiators, including Section 15.247 – Operation in the band 2400 –2483.5MHz

AS/ANS 4268:2012: Radio equipment and systems – Short range devices – Limits and methods of measurement

ETSI EN 300 440-2, V 1.4.1, 2010: Electromagnetic compatibility and Radio spectrum matters (ERM); Short Range Devices (SRD); Radio equipment to be used in the 1GHz to 40GHz frequency range; Part 2: Harmonised EN under article 3.23 of the R&TTE Directive

EN 301 489-3 V1.6.1, 2013: Electromagnetic compatibility and Radio spectrum Matters (ERM); Electromagnetic Compatibility (EMC) standard for radio equipment and services; Part 3: Specific conditions for Short Range Devices (SRD) operating on frequencies between 9kHz and 40GHz


Twin Link Datasheet 24V02, 09-Feb-2024 | (1.4 MB)

Twin Link Manual 24V06, 09-Feb-2024 | (2.1 MB)

P2P-I (Twin Link Input) Datasheet 24V02, 09-Feb-2024 | (188 KB)

P2P-O (Twin Link Output) Datasheet 24V02, 09-Feb-2024 | (1.1 MB)


Define ToolBoxDefine ToolBox

Smart, simple software to program your non-Zen series products

Use Define ToolBox software to program your non-Zen series product via your PC. It configures:

ToolBox offers a simple interface for connecting to your compatible device, and a range of flexible configuration options, including an extensive library of pre-calibrated ranges and linearization tables for advanced scaling.

Define ToolBox Configuration Software

Order Codes


P2P-TWIN-LINK Point-to-Point paired I/O units (P2P-I + P2P-O)
P2P-R Point-to-Point wireless Repeater unit


Bridge Key USB Bridge Key and communications kit (required for software configuration)
Sold separately. Not FCC approved.
Antenna Upgrades Click here for antenna upgrade options
Define ToolBox Simple utility for setting up your Point-to-Point system (Free download)

Need Help?

Our highly experienced engineering team can be reached via our Support Portal, and are ready to help with setup or troubleshooting.

Please create a Support Portal account and submit a support ticket for expert assistance.

All prices are in US Dollars. For pricing in other currencies, please contact us.