DeviceNet Connectors

DeviceNet Physical Layer and Media

DeviceNet allows different connectors, which may be grouped into open and sealed connectors. The open connectors are available with screw or with crimp connectors. The sealed connectors are available in mini-style and micro-style sizes. See Figure B-4and Table B-4for more details.

Unsealed				Sealed
Screw	Unsealed		Sealed	Sealed
Screw	Unsealed		Sealed	Micro-Style
Connector	Hard Wired		Mini-Style	Micro-Style
Connector	Hard Wired		Mini-Style	Connector
				Connector
Figure B-4. DeviceNet Connectors
Table B-4. DeviceNet Connector Styles

Connector		Description


Open plugable	Uses screws to attach cable wires to a removable
	connector

Open hard-wire	Uses wires attached directly to screw terminals

Sealed mini-style	Attaches to taps and thick or thin cable

Sealed style micro	Attaches to thin cable only – has a reduced
	current rating

Termination of the DeviceNet Network

The DeviceNet network uses the Controller Area network (CAN) bus as the physical layer. This requires that the trunk line of your DeviceNet network be terminated with a resistor at each end. This terminates the signal lines.

The terminating resistor:

•Prevents reflection of communication signals on the network.

•Connects the two signal conductors.

•Must be sealed if the end node uses a sealed tee.

•Must be open if the end node uses an open-style tap.

When using the open-style terminating resistor, connect a 121ohms, 1/4W resistor to CAN_H and CAN_L (between blue and white data-pair wires).

NOTE: A terminating resistor must also be used whenever a short drop line exceeds 6m (20 ft.).

Adept SmartController User’s Guide, Rev. E

121 RS-422/485, XSYS, XUSR, RS-232/TERM specifications

Nortech Systems offers a comprehensive suite of serial communication solutions, including RS-232/TERM, XUSR, XSYS, and RS-422/485 interfaces. These products are designed to facilitate reliable and high-speed data transmission in various industrial applications, making them essential for connecting devices in automation, telecommunications, and data acquisition systems.

The RS-232/TERM interface is a widely adopted standard for serial communication, known for its simplicity and robustness. It supports point-to-point communication over relatively short distances, typically up to 50 feet. Key features include a maximum baud rate of up to 115.2 kbps, error-checking capabilities, and a straightforward connection process, making it ideal for connecting peripheral devices like printers, modems, and barcode scanners.

Building on the RS-232 standard, the XUSR and XSYS devices offer enhanced functionalities and flexibility. XUSR, for instance, supports not just traditional RS-232 connections, but also protocol conversion for various serial interfaces, facilitating seamless integration of legacy systems with modern networking technologies. It is particularly useful in environments where multiple protocols need to be managed simultaneously.

XSYS is designed for more complex applications and supports advanced communication features such as multi-drop configurations, enabling it to connect multiple devices on a single bus. This makes it suitable for extensive industrial networks where space and wiring complexity need to be minimized. Synchronous and asynchronous data transfer modes ensure that the XSYS is adaptable for both real-time data collection and standard command-response applications.

On the other hand, RS-422/485 interfaces excel in long-distance communication, allowing for data transmission over distances up to 4,000 feet. They are designed for multi-point connections, supporting up to 32 devices on a single bus through differential signaling, which enhances noise immunity. These characteristics make RS-422/485 particularly well-suited for environments with electromagnetic interference, such as factories or subways.

Nortech Systems’ serial communication solutions emphasize reliability, ease of use, and versatility. With their commitment to high performance and user satisfaction, these interfaces provide critical connectivity in today’s increasingly automated and interconnected world. Whether in data centers, manufacturing setups, or remote sensor networks, Nortech's offerings stand out for their reliability, efficiency, and adaptability, ensuring effective data communication across diverse applications.

Nortech Systems RS-232/TERM, XUSR, XSYS DeviceNet Connectors, Termination of the DeviceNet Network

Models: RS-422/485 XSYS XUSR RS-232/TERM

DeviceNet Physical Layer and Media