WIRELESS MULTI-I/O MODULE
Add Analog and Discrete I/O Points to Any OTC Sensor Network


WM-002
HIGHLIGHTS
- 4 analog inputs (24-bit ADC)
- Independent selectability
for 0-10 Vdc or 4-20 mA mode - 4 programmable digital I/O channels
- Modbus master functionality (RS485)
- Supports Over-the-Air (OTA) functionality for updating the device configuration/calibration (900 MHz only)
- -40 °C to 80 °C (-40 °F to 176 °F)
- 900 MHz / 915 MHz / 2.4 GHz / 868 MHz
- Secure AES encryption
- Class I, Division 2 (Zone 2)


Scalable I/O Solution
The OleumTech® OTC Wireless Multi-I/O Module provides a quick and scalable solution for adding analog inputs and digital I/O points to any OTC Sensor and I/O Network. It is equipped with four high resolution analog inputs (24-bit ADC). Each input can be independently selected for either 0-10 Vdc or 4-20 mA mode of operation. It also packs four independently configurable digital channels. Each channel can be setup as an input, counter, output, or pulsed output.
Modbus Master Function
The Wireless Multi-I/O Module also features Modbus Master functionality, which gives users read and write controls over assets connected over its RS485 Serial port.
Robust Range, Advanced Networking
With the provided robust RF range, the Wireless Multi-I/O Module can rescue stranded I/O points that was once economically not feasible. The Wireless Multi-I/O Module can be added to the network as needed and its I/O points can be mapped to anywhere within the OTC Network creating an efficient, highly advanced system that is easy to create and manage. The Wireless Multi-I/O Module communicates with an assigned wireless gateway in the OTC Network. This wireless device is certified for use in Class I, Division 2 (Zone 2) hazardous locations.
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: 1000 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 40 Miles / 64 km with Clear Line of Sight (Gateway to Gateway or I/O Module) |
∙ 900/915 MHz: Up to 7500 Feet / 1.4 Miles / 2.3 km with Clear Line of Sight (Transmitter to Gateway) | |
∙ 2.4 GHz: Up to 4.3 Miles / 7 km with Clear Line of Sight (Gateway to Gateway) | |
∙ 868 MHz: Up to 5.2 Miles / 8.4 km with Clear Line of Sight (Gateway to Gateway) |
HARDWARE FEATURES | |
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Device Functionality | ∙ Wireless Multiple Input / Output Module |
Embedded Controller | ∙ Ultra-Low Power RISC Microcontroller with Internal FLASH (Field Upgradeable) |
Configuration | ∙ Config / Debug Port - RS232 Slave Only (RJ-45) / BreeZ® Software for PC |
Serial | ∙ RS485 Port - Modbus Master Only (RJ-45) |
I/O Interfaces | ∙ 4 Analog Inputs (24-bit ADC): 0-10 V or 4-20 mA Selectable Modes |
∙ 4 Programmable Digital (Discrete) Channels | |
- Supports Mix of Inputs and Outputs | |
- 30 Vdc (Max) Input for All Channels | |
- 1A Sink Current for Open-Drain Outputs | |
- Configurable Debounce Filter | |
Device Diagnostics | ∙ Health Tags: Supply Voltage, Received Signal Strength Indication (RSSI), RF Refresh, RF Timeout |
MECHANICAL SPECIFICATIONS | |
Dimensions | ∙ 4.9" (W) x 3" (H) x 1.4" (D) / 124.5 mm (W) x 76.2 mm (H) x 35.6 mm (D) |
Package Dimensions | ∙ 8" (W) x 6" (H) x 2.5" (D) / 203 mm (W) x 152 mm (H) x 63 mm (D) |
Weight | ∙ Net: 0.75 lbs / 0.3 kg; Packaging: 1 lbs / 0.4 kg |
Mounting | ∙ DIN Rail Mountable with Height Adjustability |
ELECTRICAL SPECIFICATIONS | |
DC Power Input | ∙ 9-30 Vdc |
Average Power Input | ∙ 2 Watt |
900/915 MHz Pwr Cons. @ 12 V | ∙ @100 mW: Idle = 33 mA; Transmit = 138 mA | @1 Watt: Idle = 33 mA; Transmit = 272 mA |
900/915 MHz Pwr Cons. @ 24 V | ∙ @100 mW: Idle = 26 mA; Transmit = 92 mA; | @1 Watt: Idle = 26 mA; Transmit = 180 mA |
2.4 GHz Pwr Cons. @ 12 V | ∙ @25 mW: Idle = 28 mA; Transmit = 60 mA | @ 63 mW: Idle = 28 mA; Transmit = 74 mA |
2.4 GHz Pwr Cons. @ 24 V | ∙ @25 mW: Idle = 22 mA; Transmit = 44 mA | @ 63 mW: Idle = 22 mA; Transmit = 58 mA |
868 MHz Pwr Cons. @ 12 V | ∙ @10 mW: Idle = 22 mA; Transmit = 40 mA | @ 25 mW: Idle = 22 mA; Transmit = 49 mA |
868 MHz Pwr Cons. @ 24 V | ∙ @10 mW: Idle = 20 mA; Transmit = 28 mA | @ 25 mW: Idle = 20 mA; Transmit = 33 mA |
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 |
∙ Class I, Zone 2 AEx nA IIC T4 | |
∙ ATEX: Sira 14ATEX4143X; Ex nA IIC T4 Gc, II 3 G | |
∙ IECEx: SIR 13.0055X; Ex nA IIC T4 Gc |
GENERAL SPECIFICATIONS | |
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Operating Conditions | ∙ 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 | ∙ WM-0900-002, WM-0915-002, 2.4 GHz, WM-2400-002, WM-0868-002 |
Wirelessly Connects To | ∙ OTC Wireless Gateway |
Configuration Cable | ∙ SX1000-CC2, 20-ft All-in-One Configuration Cable |
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