OTC I/O Expansion Modules


Add Discrete I/O Points to Any OTC Sensor Network



  • 6x programmable digital I/O channels
  • Supports any mix of inputs and outputs
  • Normally open/close, counts, pulsed modes
  • 10 ms to 2000 ms debounce filter
  • 1 Amp sink current for open-drain outputs
  • -40 °C to 80 °C
  • Class I, Division 2 (Zone 2)
  • 900 MHz or 2.4 GHz radio option
  • Secure AES encryption

Scalable I/O Solution

The OleumTech® Wireless Digital I/O Module provides a quick and scalable solution for adding up to six digital I/O points to any OTC Sensor and I/O Network. Each of the digital channel can be programmed independently as inputs or outputs. Each of the channels can be setup as input, counter, output, or pulsed output. The Wireless Digital I/O Module communicates with an assigned wireless gateway in the network. This wireless device is certified for use in Class I, Division 2 (Zone 2) hazardous locations.

Robust Range, Advanced Networking

With the provided robust RF range, the Wireless Digital I/O Module can rescue stranded I/O points that was once economically not feasible. The Digital I/O Module can be added to the network as needed and its I/O points can to be mapped to anywhere within the OTC Network creating an efficient, highly advanced system that is yet easy to create and manage.


Type: 900 MHz / 2.4 GHz∙ ISM Band, Spread Spectrum
∙ 900 MHz: FHSS (Frequency Hopping), FSK, AES Encryption 256-bit (900 MHz), 128-bit (915 MHz)
∙ 2.4 GHz: DSSS (Direct-Sequence), AES Encryption 128-bit
Bit Rate∙ 900 MHz: 9600 bps / 115.2 kbps ; 2.4 GHz: 250 kbps
Output Power∙ 900 MHz: Up to 1000 mW; 2.4 GHz: 63 mW
Receiving Sensitivity∙ 900 MHz: -110 dBm @ 9600 bps, -100 dBm @ 115.2 kbps / 2.4 GHz: -100 dBm @ 250 kbps
RF Range∙ 900 MHz: Up to 40 Miles / 64 km with Clear Line of Sight
∙ 2.4 GHz: Up to 5.7 Miles / 9.2 km with Clear Line of Sight
Mounting∙ DIN Rail Mountable with Height Adjustability
Device Functionality∙ Wireless Digital Input / Output Module
Embedded Controller∙ 32-bit Low Power ARM7 Microcontroller with Internal FLASH (Field Upgradeable)
Configuration∙ Config / Debug Port - RS232 Slave Only (RJ-45) / BreeZ® Software for PC
I/O Interfaces∙ 6 Programmable Digital (Discrete) Inputs and Outputs
- Supports Mix of Inputs and Outputs
- 30 Vdc (Max) Input for All Channels
- 1 A Sink Current for Open-Drain Outputs
- Configurable Debounce Filter
Device Diagnostics∙ Health Tags: Supply Voltage, Received Signal Strength Indication (RSSI), RF Refresh, RF Timeout
Dimensions∙ 3.8" (W) x 3" (H) x 1.4" (D) / 96.5 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
Connection Fitting∙ DIN Rail or Direct Mount / Custom Enclosures Available
DC Power Input∙ 9-30 VDC
Average Power Input∙ 2 Watt
Power Consumption∙ 12 V / 1W: Idle: 60 mA; Configuration: 60 mA; Transmission: 170 mA
EMC/EMI∙ FCC Part 15 (USA)
∙ IC ICES-003 (Canada)
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
∙ IECEx: SIR 13.0055X; Ex nA IIC T4 Gc
Operating Conditions∙ Temperature: Class I, Div 2: -40 °F to 176 °F (-40 °C to 80 °C)
ATEX/IECEx: -4 °F to 176 °F (-20 °C to 80 °C)
∙ Humidity: 0 to 99 %, Non-Condensing
Warranty∙ 2-Year Parts and Labor
Country of Origin∙ USA
Model Number(s)∙ 900 MHz: WM-0900-004; 2.4 GHz: WM-2400-004
Wirelessly Connects To∙ OTC Wireless Gateway
Configuration Cable∙ SX1000-CC2, 20-ft All-in-One Configuration Cable