Model DI-789
Enhanced Ethernet Switch Expands Distance Between Synchronous Units over 100 meters apart
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Not available for online purchase
- Includes a DI-789 instrument, a power supply and adapter, and software on CD
- Enhanced Ethernet switch expands distance between synchronous Ethernet units over 100 meters apart
- Use with DI-720, DI-730, DI-785, and DI-788 Ethernet products
- 12 VDC power adapter included.

Description
Model DI-789 repeater is a specialized Ethernet switch that is designed to work with DATAQ Instruments synchronized Ethernet products. Those products allow a number of data acquisition devices to be distributed with as much as 100 meters between units and still maintain high- or low-speed synchronous operation. The DI-789 repeater may be used when the distance between units exceeds 100 meters, or when ambient electrical noise renders long Ethernet runs unreliable.
The DI-789 is an enhanced Ethernet switch that is capable of managing the network to ensure that all data acquisition units in the chain remain synchronized. One or more DI-789s may be deployed with a maximum distance of 100 meters between other repeaters or data acquisition devices so that the maximum distance between a PC and one or more data acquisition units is virtually unlimited.
The DI-789 provides one each upstream and downstream RJ45 connector. Indicators consist of a power-on LED, and pair of LEDS that indicate upstream and downstream activity, and an LED that confirms network synchronization. The DI-789 is provided with an AC adaptor, and can also be powered from any 9-36VDC source.
Specifications
| Interface and Connections | |
| Type: | Ethernet (RJ45) |
| Interface Connections: | 2 (upstream synchronization and downstream synchronization) |
| Power: | Standard DIN power connector (DC power supply provided) |
| Ground: | Ground lug screw |
| Indicators | |
| Front Panel: | Power LED (green) Upstream Ethernet activity LED (green) Downstream Ethernet activity LED (green) Lost Synchronization LED (red) |
| Rear Panel: | none |
| Power | |
| Voltage Range: | 9-36 VDC |
| Power Requirements: | < 5 Watts |
| Environmental | |
| Operating Temperature: | -40°C to 70°C |
| Operating Humidity: | 0 to 90% non-condensing |
| Storage Temperature: | -40°C to 70°C |
| Storage Humidity: | 0 to 90% non-condensing |
| Physical Characteristics | |
| Enclosure: | Aluminum base with steel wrap-around. Aluminum end-panels with plastic bezels. |
| Dimensions: | 5.4D × 4.1W × 1.5H in. (13.81D × 10.48W × 3.81H cm.) |
| Weight: | 14 oz. (397 grams) |
Articles
Synchronized and Distributed Data Acquisition in Hot Strip Steel Mills
EN-B Ethernet Communications and Installation Issues
Videos
Distributed and Synchronized
Distributed Synchronous Ethernet data acquisition with DI-720/730 Systems.


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sales@dataq.com
330-668-1444
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