Connecting Customer-Supplied Digital I/O Equipment

XDIO Connector

The XDIO connector on the SmartController is a 50-pin, standard density D-Sub female connector (see Figure 3-1 on page 37 for location). There are 12 inputs and 8 outputs, each optically isolated from the circuitry of the SmartController. The connector also provides 24V pins for powering customer equipment. There are four 24V pins and four ground pins, which are limited to a total of 1A of current. The source of the 24V is the XDC1 or XDC2 connector on the front of the SmartController.

Input Signals

The XDIO connector handles input signals 1001 to 1012. Each channel has an input and a corresponding return line. See Table 3-10for input specifications. The connector pin-outs are shown in Table 3-12 on page 63.

Table 3-10. DIO Input Circuit Specifications (XDIO connector)

Operational voltage range

0 to 24VDC

 

 

“Off” state voltage range

0 to 3VDC

 

 

“On” state voltage range

10 to 24VDC

 

 

Typical threshold voltage

Vin = 8VDC

 

 

Operational current range

0 to 6 mA

 

 

“Off” state current range

0 to 0.5 mA

 

 

“On” state current range

2 to 6 mA

 

 

Typical threshold current

2.5 mA

 

 

Impedance (Vin/Iin)

3.9 K Ω minimum

Current at Vin = +24VDC

Iin ≤ 6 mA

 

 

Turn on response time (hardware)

5 µsec maximum

Software scan rate/response time

16 ms scan cycle/

 

32 ms max response time

 

 

Turn off response time (hardware)

5 µsec maximum

Software scan rate/response time

16 ms scan cycle/

 

32 ms max response time

 

 

NOTE: The input current specifications are provided for reference; voltage sources are typically used to drive the inputs.

NOTE: When the program task priorities are properly set, there is a 2 ms maximum latency for fast inputs 1001 to 1004 when used with V+ INT.EVENT instruction.

In the following figure, example 1 shows inputs (1001 to 1004) with a negative common, example 2 shows inputs (1005 to 1008) with a positive common, and example 3 shows inputs (1009 to 1012) with an independent power supply (no common).

Adept SmartController User’s Guide, Rev. E

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Nortech Systems XSYS, XUSR, RS-232/TERM Xdio Connector, Connecting Customer-Supplied Digital I/O Equipment, Input Signals
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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.
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