Appendix A - sDIO Module

A.6 sDIO Digital I/O Signals

The sDIO module’s digital I/O signals are 64 optically isolated digital I/O channels (32 output and 32 input). They are wired to connectors X1 through X4, which are located on the front of the sDIO (see Figure A-6 on page 103). The electrical specifications for the inputs are similar to the XDIO inputs, but have a different wiring configuration. The sDIO inputs cannot be used for REACTI programming, high-speed interrupts, or vision triggers. See the V+ Language User’s Guide for information on digital I/O programming.

NOTE: The signals on the sDIO connectors can be superseded by another sDIO that is installed and addressed as sDIO #1. To use two sDIO modules, address the first as sDIO #1 and the second as sDIO #2.

sDIO Inputs

The 32 input channels are arranged in four groups of eight. Each group is electrically isolated from the other groups and is optically isolated from the sDIO module’s circuitry. The eight inputs within each group share a common ground.

The inputs are accessed through the two female 26-pin D-sub input connectors on the front of the sDIO. Each connector provides access to two input groups. Each group requires ten pins, eight input signals, and two ground references. An input is activated by providing a positive potential on its input pin relative to the ground pin of its group. This type of input is considered sinking. That is current must flow into the input pin to turn it on.

Table A-2. sDIO Input Specifications

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.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.

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Nortech Systems XUSR, RS-232/TERM, XSYS SDIO Digital I/O Signals, SDIO Inputs, Adept SmartController User’s Guide, Rev. E
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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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