OTC I/O Expansion Modules


Add More Analog Inputs to a DH1 Gateway



  • Provides 4 analog inputs (24-bit ADC)
  • Designed for use with a DH1 Wireless Gateway
  • Independently selectable input options for
    supporting 0-5 V, 0-10 V, or 4-20 mA signal
  • RS485 Serial connectivity
  • -40 °C to 80 °C (-40 °F to 176 °F)
  • Class I, Division 2 (Zone 2) certified

4 High Resolution Analog Inputs

The OleumTech® OTC Analog Input Module is designed exclusively for use with a DH1 Wireless Gateway for integrating four additional high resolution analog inputs (24-bit ADC) via RS485 Serial connectivity. Each input can be independently selected for either 0-5 Vdc (default), 0-10 Vdc, or 4-20 mA mode of operation via jumper settings while the Slave ID and device parameters are programmed using the OleumTech BreeZ® Configuration Software.

Low-Power, Reliable

The Analog Input Module is certified for use in Class I, Division 2 (Zone 2) hazardous locations and accepts 9-24 Vdc external power. Its compact footprint easily fits inside a NEMA enclosure. The Analog Input Module is equipped with two RS485 Serial ports (RJ-45) for supporting multi-drop applications.


Over Voltage Rating∙ Transient Voltage Suppressor on Each Port
Short Circuit Protection∙ Fuse Protection (375 mA)
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
Device Functionality∙ Analog Input Expansion Module for DH1 Wireless Gateway
Device Interface∙ RS485 (RJ-45 2-Wire), Modbus / RTU Protocol
I/O Interface∙ 4 Analog Inputs
Resolution∙ 24-bit ADC
Accuracy∙ 0.1 % of Full Scale, 0.2% of Full Scale Over Temperature Range
Sensor/Receiver Voltage∙ (2-Wire) 4-20 mA; (3-Wire) 0-5 V or 0-10 V (Jumper Selectable)
Input Impedance∙ 250 ohm (4-20 mA), 40K ohm (0-5 V), 34K ohm (0-10 V)
RS485/Serial∙ RS485 (2-Wire), 9,600/19,200 Baud, Modbus/RTU Protocol
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; Gross: 1 lbs / 0.4 kg
Mounting∙ DIN Rail Mountable with Height Adjustability
DC Power Input∙ 9-24 Vdc
Power Consumption∙ 60 mW @ 12 Vdc (Excludes External Sensors)
Wiring∙ 18-24 AWG
Operating Conditions∙ Temperature: -40 °F to 176 °F (-40 °C to 80 °C)
ATEX/IECEx: -40 °F to 176 °F (-40 °C to 80 °C)
∙ Humidity: 0 to 99 %, Non-Condensing
Warranty∙ 2-Year Parts and Labor
Country of Origin∙ USA
Model Number∙ WM3000-002
Connects To∙ DH1 Base Unit Wireless Gateway and Expansion Modules
Configuration Cable∙ SX1000-CC2, 20-ft All-in-One Configuration Cable