IO MAX® WIRELESS TRANSMITTER
Low-Power Self-Contained Wireless Monitoring & Control Solution


WT-MX1
HIGHLIGHTS
- 4 analog inputs (4-20 mA / 0-10 Vdc)
- 2 discrete inputs
- 2 discrete outputs (1.1 Amp cont. / 1.5 Amp pulse)
- Master function: Modbus/HART/LevelMaster
- Self-contained, rugged design
- Multi-drop up to 16 slave devices
- Dedicated 10 Vdc output for powering
H-Series Resistive Tank Level Sensors - IP66, -40 °C to 80 °C
- 900/915 MHz range: Up to 3.7 Miles (6 km)
- 2.4 GHz range: Up to 1.9 Miles (3.1 km)
- 868 MHz range: Up to 1.5 miles (2.4 km)
- Secure AES encryption
- Class I, Division 2 (Zone 2) certified
- Click here for solar power solution


Long-Range Multi-Function I/O Transmitter
The OleumTech® IO MAX® Wireless Transmitter provides four analog inputs for supporting 4-20 mA or 0-10 Vdc signals. The IO MAX also provides two discrete inputs and two discrete outputs. The WT-MX1 can be configured to operate as a master device interfacing Modbus, LevelMaster ASCII, or HART devices. Multi-drop up to 16 instruments. The IO MAX is powered using an external 9-24 Vdc source. This not only enables its users to customize their power solution, but also allows for the IO MAX to supply continuous power to connected sensors or slave devices if required.
Reliable, Scalable, and Safe
The field-proven wireless sensor node communicates with an assigned Wireless Gateway within the OTC Wireless Sensor and I/O Network, creating a highly scalable network, accommodating virtually any I/O requirement.
The OleumTech wireless transmitter is certified for use in Class I, Division 2 (Zone 2) hazardous locations and provides a robust RF range.
TECHNICAL SPECIFICATIONS
WIRELESS COMMUNICATIONS | |
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Radio Band | ∙ ISM Band (License-Free) |
900 MHz / 915 MHz | ∙ FHSS, FSK, AES Encryption 256-bit (900 MHz), 128-bit (915 MHz) |
2.4 GHz | ∙ DSSS, AES Encryption 128-bit |
868 MHz | ∙ LBT-AFA, AES Encryption 128-bit |
Bit Rate | ∙ 900/915 MHz: 9600 bps / 115.2 kbps; 2.4 GHz: 250 kbps; 868 MHz: 80 kpbs |
Output Power (Max) | ∙ 900/915 MHz: 100 mW; 2.4 GHz: 63 mW; 868 MHz: 25mW |
Receiving Sensitivity | ∙ 900/915 MHz: -110 dBm @ 9600 bps, -100 dBm @ 115.2 kbps |
∙ 2.4 GHz: -101 dBm @ 250 kbps; 868 MHz: -106 dBm @ 80 kbps | |
RF Range | ∙ 900/915 MHz: Up to 3.7 Miles / 6 km with Clear Line of Sight |
∙ 2.4 GHz: Up to 1.9 Miles / 3.1 km with Clear Line of Sight | |
∙ 868 MHz: Up to 1.5 Miles / 2.4 km with Clear Line of Sight |
HARDWARE FEATURES | |
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Device Functionality | ∙ Wireless Transmitter with Support for Analog Inputs and Digital I/O |
∙ Master Function: Modbus/LevelMaster/HART (Software Selectable) | |
Embedded Controller | ∙ Ultra-Low Power RISC Microcontroller with Internal FLASH (Field Upgradeable) |
Configuration | ∙ BreeZ® Software for PC |
I/O Interface | ∙ 4 Analog Inputs (0-10 Vdc or 4-20 mA), 24-bit ADC, Independently Selectable via DIP Switches |
∙ 2 Discrete Inputs (Up to 24 Vdc, For Dry Contact or Open-Drain Output/NPN Devices), 20 ms - 2 s Filter | |
∙ 2 Discrete Outputs (Open-drain / NPN / 1.1 Amp Sink Current (Continuous), 1.5 Amp Sink Current (2 Sec Pulse) | |
Accuracy | ∙ ±0.2 % Accuracy for 4-20 mA Input |
RS485 | ∙ Half-Duplex |
Modbus RTU | ∙ Master Function, Read and Write, Multi-drop up to 16 Slave Devices |
LevelMaster ASCII | ∙ Master Function, Read Only, Multi-drop up to 16 Slave Devices |
HART | ∙ Master Function, Read Only (PV, SV, TV, QV), Multi-drop up to 16 HART Instruments |
Power Source | ∙ External 9-24 Vdc (Maximum Voltage Tolerance: 28.8 Vdc) |
Output Power with Ext. Power | ∙ Continuous Power: 9-24 Vdc, 100 mA Total Max, Switchable Power to Analog Sensors: 15 Vdc |
Sensor Power Up Delay | ∙ Adjustable 0~60,000 ms (Switchable Power Only), 0 = Continuous (External Power Only) |
Device Diagnostics | ∙ Health Tags: Battery Voltage, Received Signal Strength Indication (RSSI), RF Refresh, RF Timeout |
MECHANICAL SPECIFICATIONS | |
Dimensions (WxHxD) | ∙ 6.3 x 12.8 x 4.4-inch / 159 mm x 324 mm x 111 mm |
Package Dimensions | ∙ 10.38 x 14.38 x 6.5-inch / 26.4 cm x 36.5 cm x 16.5 cm |
Weight | ∙ Net: 5.5 lbs / 2.4 kg ; Package: 6.5 lbs / 3.5 kg |
Connection Fitting | ∙ (3) 3/4-inch NPT Female, Pipe Mountable |
Enclosure Casing Material | ∙ Type 4X Aluminum; IP66 |
ELECTRICAL SPECIFICATIONS | |
DC Power Input | ∙ 9-24 Vdc (Maximum Voltage Tolerance: 28.8 Vdc) |
Power Consumption @ 12 V | ∙ Average Current: 0.35 mA (Tx Pwr @100 mW, Tx Interval @ 60 sec) |
∙ Average Current: 0.66 mA (Tx Pwr @100 mW, Tx Interval @ 30 sec) | |
∙ Average Current: 18.58 mA (Tx Pwr @100 mW, Tx Interval @ 1 sec) | |
Power Consumption @ 24 V | ∙ Average Current: 0.21 mA (Tx Pwr @100 mW, Tx Interval @ 60 sec) |
∙ Average Current: 0.38 mA (Tx Pwr @100 mW, Tx Interval @ 30 sec) | |
∙ Average Current: 10.44 mA (Tx Pwr @100 mW, Tx Interval @ 1 sec) |
CERTIFICATIONS & COMPLIANCE | |
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EMC/EMI | ∙ FCC Part 15 (USA), IC ICES-003 (Canada), ACMA (Australia) |
∙ AS/NZS CISPR 32 (Australia), EN55032 & EN55024 (EU) | |
Safety | ∙ Class I, Division 2, Groups A, B, C, D T4; Ex nA IIC T4 Gc |
∙ Class I, Zone 2; AEx nA ic IIC T4 Gc / 9-24 Vdc, 0.64 A | |
∙ ATEX: Sira 18ATEX4010X; Ex nA IIC T3 Gc; II 3 G | |
∙ IECEx: SIR 18.0002X; Ex nA IIC T3 Ga / 9-24 Vdc, 0.64 A |
GENERAL SPECIFICATIONS - TRANSMITTER | |
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Operating Conditions | ∙ Ambient Temperature (Class I, Division 2 / Zone 2): -40 °C to 80 °C (-40 °F to 176 °F) |
∙ Humidity: 0 to 99 %, Non-Condensing | |
Warranty | ∙ 2-Year Parts and Labor |
Country of Origin | ∙ USA |
ORDERING INFORMATION | |
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Model Numbers | ∙ WT-0900-MX1, WT-0915-MX1, WT-2400-MX1, WT-0868-MX1 |
Wirelessly Connects To | ∙ OTC Wireless Gateway |
Configuration Cable | ∙ SX1000-CC2, 20-ft All-in-One Configuration Cable |
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