

DH2-W
HIGHLIGHTS
- Wirelessly gather/distribute sensor data
- Map I/O points anywhere within the network
- Point-to-multipoint, peer-to-peer connectivity
- Modbus Master/Slave functionality
- Supports local Over-the-Air (OTA) functionality for updating OleumTech wireless devices (OTA Link Adapter required, 900 MHz only)
- Serial/RTU interface (RS232/RS485)
- Integrate OleumTech I/O Expansion Modules without sacrificing its Serial port
- I/O Expansion Modules available (isolated)
- Compact form factor
- -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) certified
- Advanced peer-to-peer (P2P) communication functionality


Primary Data Collection Point
The OleumTech® DH2-W Wireless Gateway plays an integral role in the OTC Wireless Sensor and I/O Network. It possesses the ability to aggregate data from OTC wireless transmitters and I/O modules onto its 1920-point register holding table. Third-party devices can access the data over the Modbus or LevelMaster ASCII protocol.
Compact and Versatile
The DH2-W is a full-function Gateway and is ideal for fitment where enclosure space is a premium. When it is deployed by itself, it can be installed on a DIN rail having less than 1-inch width of space. The DH2-W can be configured as a Modbus master or slave device and provides RS232/RS485 connectivity.
Peer-to-Peer Advanced Networking
Deploy multiple gateways to the OTC platform, creating a custom, highly scalable network. The gateways have the ability to communicate with one another. Leverage the peer-to-peer technology and funnel data to the primary gateway, optimizing network efficiency and/or designing an extremely flexible I/O mapping system across the entire wireless network.
Modular Wireless I/O Expansion Solution
OleumTech offers isolated 0-10 Vdc, 4-20 mA, and Digital I/O Expansion Modules for use with the DH2-W for solving various I/O challenges. The I/O Modules can be used in any mix or combination with the DH2-W. The BreeZ® Software makes it extremely easy to add and configure I/O points. A standard 35 mm DIN rail is required for I/O Expansion Module(s) integration.
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 | ∙ Serial Wireless Gateway with I/O Expansion Capabilities |
Embedded Controller | ∙ 32-bit Low Power ARM7 Microcontroller with Internal FLASH (Field Upgradeable) |
Serial Interfaces | ∙ RTU Port (RS232/RS485) Terminal Block |
∙ Modbus Master/Slave, LevelMaster ASCII Slave, ROC-Link Master (Supports Opcodes 17 and 10) | |
Configuration | ∙ Config / Debug Port - RS232 Slave Only (Mini-USB) / BreeZ® Software for PC |
Device Diagnostics | ∙ Health Tag: Supply Voltage |
MECHANICAL SPECIFICATIONS | |
Dimensions | ∙ 0.7 x 3.9 x 4.5-in / 17.5 x 99 x 114 mm |
Package Dimensions | ∙ GM1: 4.8 x 5.1 x 2.8-in / 123 x 129 x 72 mm | GM1K: 5.5 x 10.1 x 2.8-in / 140 x 257 x 72 mm |
Package Weight | ∙ GM1: 0.5 lbs / 227 g | GM1K: ~1 lbs / 0.4 kg |
DIN Rail Mounting | ∙ 35 mm x 7.5 mm DIN Rail |
I/O Module Support | ∙ Up to 5 I/O Modules using 156 mm DataRail Bus |
ELECTRICAL SPECIFICATIONS | |
DC Power Input | ∙ 9-30 Vdc |
Average Power Input | ∙ 2 Watt |
Power Consumption @12 Vdc | ∙ 900/915 MHz @ 1000 mW: Receive Avg 62 mA, Transmit Avg 291 mA |
∙ 2.4 GHz @ 63 mW: Receive Avg 62 mA, Transmit Avg 109 mA | |
∙ 868 MHz @ 25 mW: Receive Avg 59 mA, Transmit Avg 75 mA | |
Power Consumption @24 Vdc | ∙ 900/915 MHz @ 1000 mW: Receive Avg 37 mA, Transmit Avg 168 mA |
∙ 2.4 GHz @ 63 mW: Receive Avg 37 mA, Transmit Avg 62 mA | |
∙ 868 MHz @ 25 mW: Receive Avg 35 mA, Transmit Avg 45 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 Gc |
∙ Class I Zone 2 AEx nA IIC T4 Gc | |
∙ ATEX: Sira 15ATEX4134X; Ex nA IIC T4 Gc, II 3 G | |
∙ IECEx: SIR 15.0055X; Ex nA IIC T4 Gc |
SOFTWARE USER INTERFACE (PC APPLICATION) | |
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Version/PC Platform | ∙ BreeZ Software v6.0 or Higher; PC with Windows® 7 or Later |
GENERAL SPECIFICATIONS | |
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Operating Conditions | ∙ Temperature: Class I, Div 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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Gateway Only (GM1) | ∙ BM-0900-GM1, BM-0915-GM1, BM-2400-GM1, BM-0868-GM1 |
Gateway with I/O Kit (GM1K) | ∙ BM-xxxx-GM1K (Includes DataRail and Mounting Hardware) |
DIN Rail Mounting Kit | ∙ SA1000-WK1 (1x DataRail + Mounting H/W: Cover, 2x End Terminal Brackets, 4x Terminal Plugs) |
4-20 mA I/O Module | ∙ BM-A420-122S (Single Pack) / BM-A420-122D (Dual Pack) |
0-10 V I/O Module | ∙ BM-A010-122S (Single Pack) / BM-A010-122D (Dual Pack) |
Digital I/O Module | ∙ BM-D100-144S (Single Pack) / BM-D100-144D (Dual Pack) |
Wirelessly Connects To | ∙ OTC Wireless Devices (Gateways, Transmitters, I/O Modules) |
Configuration Cable | ∙ SX1000-CC2, 20-ft All-in-One Configuration Cable |
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DH2 WIRELESS GATEWAY
Serial Interface
DH2 WIRELESS GATEWAY
Serial Interface



DH2
HIGHLIGHTS
- Wirelessly gather/distribute sensor data
- Map I/O anywhere within the network
- Modbus master/slave functionality
- 1x configurable Serial port (RS232/RS485)
- Class I, Division 2 (Zone 2)
- -40 °C to 80 °C
- 900 MHz or 2.4 GHz radio option
- Secure AES encryption
DH2 WIRELESS GATEWAY
Serial Interface



DH2
HIGHLIGHTS
- Wirelessly gather/distribute sensor data
- Map I/O anywhere within the network
- Modbus master/slave functionality
- 1x configurable Serial port (RS232/RS485)
- Class I, Division 2 (Zone 2)
- -40 °C to 80 °C
- 900 MHz or 2.4 GHz radio option
- Secure AES encryption