SLSC-12201

This document explains how to connect the SLSC-12201.

? Note: Before you begin, complete the software and hardware installation procedures applicable to your application.

? Note: The guidelines in this document are specific to the SLSC-12201. The other components in the system might not meet the same safety ratings. Refer to the documentation of each component in the system to determine the safety and EMC ratings for the entire system.

Module Description: The SLSC-12201 is a 32-channel digital input/output module with voltage capabilities ranging from 5 V to 33 V. It features two main connectors, J1 and J2, for signal connections.

Safety Guidelines

⚠️ Caution: Observe all instructions and cautions in the user documentation. Using the model in a manner not specified can damage the model and compromise the built-in safety protection. Return damaged models to NI for repair.

⚠️ Attention: Follow all instructions and heed all cautions in the user documentation. Using the model in any way not specified risks damaging it and compromising the integrated safety protection. Return damaged models to NI for repair.

Safety Voltages

⚠️ Caution: Do not connect the SLSC-12201 to signals or use for measurements within Measurement Categories II, III, or IV.

⚠️ Attention: Do not connect the SLSC-12201 to signals or use it for measurements within Measurement Categories II, III, or IV.

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.

? Note: Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

EMC Guidelines

This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility (EMC) stated in the product specifications. These requirements and limits provide reasonable protection against harmful interference when the product is operated in the intended operational electromagnetic environment.

This product is intended for use in industrial locations. However, harmful interference may occur in some installations, when the product is connected to a peripheral device or test object, or if the product is used in residential or commercial areas. To minimize interference with radio and television reception and prevent unacceptable performance degradation, install and use this product in strict accordance with the instructions in the product documentation.

Furthermore, any changes or modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules.

⚠️ Notice: To ensure the specified EMC performance, operate this product only with shielded cables and accessories.

⚠️ Notice: To ensure the specified EMC performance, the length of all I/O cables must be no longer than 3 m (10 ft).

Preparing the Environment

Ensure that the environment in which you are using the SLSC-12201 meets the following specifications.

¹ The chassis internal ambient temperature may reach 85 °C with all slots at the maximum allowed power dissipation.

? Note: Refer to the device specifications on ni.com/manuals for complete specifications.

Circuitry

The SLSC-12201 module's circuitry includes several key components for digital input/output operations. The diagram illustrates the configuration for a single channel, which can be extended to all 32 channels.

Key Components and Signals:

• Px.y: Represents a digital input/output channel.
• Front I/O: Input/output connection for the front panel.
• GND: Ground connection.
• Vsup_0, Vsup_1: Voltage supply connections for different banks.
• PullupEnable: Control signal for internal pull-up resistors.
• VsupSelect: Selects the voltage supply for the channel.
• ChannelEnable: Enables the channel's operation.
• ChannelDirection: Configures the channel as input or output.
• Control Logic: Manages the channel's behavior based on software configuration.
• InputThreshold: Sets the voltage threshold for digital input detection.
• RangeEnable5V: Enables a specific voltage range for input.
• DIO(z): Digital Input/Output signal line.
• Rear I/O: Input/output connection for the rear panel.

Signal Flow: Signals from the front or rear I/O are processed through the control logic, which determines their direction (input/output) and state (sourcing/sinking) based on software configuration and enable signals. Voltage supplies (Vsup_0, Vsup_1) power the module's operations.

Legend:

• Hardware connections are indicated by solid lines.
• Software control signals are indicated by dashed lines.
• Signal paths are indicated by dotted lines.

? Note: The diagram shows only one channel for simplicity. All voltages are relative to GND unless otherwise noted.

? Note: You can configure the power-on configuration in the software. The factory default power-on configuration sets the front I/O channels to sinking input and rear I/O channels to input.

Pinout Information

Front Panel Pinout (J1 and J2)

The SLSC-12201 features two 37-pin D-sub connectors, J1 and J2, on the front panel, providing access to its 32 digital I/O channels.

Connector J1 (Ports 0 and 1)

Table 1. Front Panel Signal Descriptions:

Connector J2 (Ports 2 and 3)

Connector J2 is similarly configured for Ports 2 and 3.

XJ2 Connector Pinout

The XJ2 connector is a high-density connector providing access to digital I/O signals.

Table 2. XJ2 Connector Pin Assignments:

Table 3. XJ2 Connector Signal Descriptions:

XJ3 Connector Pinout

The XJ3 connector provides voltage supply and ground connections.

XJ3 Connector Pinout:

• Vsup_0
• GND
• Vsup_1
• GND
• NC
• NC
• NC
• NC

Table 4. XJ3 Connector Signal Descriptions:

Connecting Digital Devices to the SLSC-12201

The SLSC-12201 has 32 digital input/output channels that allow the direction to be configured for each channel. The 32 channels are organized into two banks of 16 channels each. Each bank can be powered from either of the Vsup connections. The banks are further organized into two ports of eight channels each. In the example shown below, the SLSC-12201 connects to the PXIe-7821R through the RTI-12301.

Connection Example:

A "Device Under Test" connects to the SLSC-12201's digital I/O channels (e.g., P0.0, P0.1, P0.2, P3.6, P3.7). These channels can be configured as sinking input, sourcing input, push-pull output, or sourcing output. The SLSC-12201 is powered by a DC Power Supply via Vsup_0 or Vsup_1. The module then interfaces with a Measurement System (e.g., FPGA on PXIe-7821R) through an RTI-12301 module, using signals like DIO0, DIO1, DIO2, DIO30, DIO31.

Short-Circuit Protection

Digital output channels are protected against short-circuit faults.

? Note: The SLSC-12201 supports up to 10 channels in simultaneous short-circuit fault.

Worldwide Support and Services

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Legal and Copyright Information

Information is subject to change without notice. Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for information on NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S. Government Customers: The data contained in this manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

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Document Revision: 377035C-01, July 25, 2019