2635A

Users Manual

2.Loosen the wire clamp screw for the associated terminal.

3.Feed the wire into the gap between the connector body and the wire clamp.

4.Tighten the wire clamp screw.

5.Insert the connector in the rear panel.

Digital I/O Connections

The ten-terminal rear panel DIGITAL I/O connector (Figure 1-8) serves two functions: Digital I/O and Totalizer input. Each is described below.

TerminalFunction

0Input/Output Line 0

1Input/Output Line 1

2Input/Output Line 2

3Input/Output Line 3

4Input/Output Line 4

5Input/Output Line 5

6Input/Output Line 6

7Input/Output Line 7

Σ Totalizer Input

Ground Terminal

DIGITAL I/O

0 1 2 3 4 5 6 7 Σ

op08f.eps

Figure 1-8. DIGITAL I/O Connector

Digital I/O

Terminals 4 through 7 are used to signal alarm conditions for channels 4 through 20 (default setting) using TTL voltage levels, referenced to the GROUND terminal. Logic high is >+2.0 to <+5.5V dc; a logic low is 0.0 to +0.8V dc. If a channel is not in alarm, the voltage output at a connector terminal is a logical high (nominal +5V dc); if a channel is in alarm, the output is a logical low (nominal +0.7V dc). Alarm outputs are changed at the end of each scan. See "Setting the Alarms" in Chapter 2 for more information. All alarm associations can be removed using computer commands, allowing the I/O terminals to be assigned to other functions as determined by computer commands. See the ALARM_ASSOC_CLR and related commands, described in Chapter 4.

Totalizer Input

The totalizer is an internal counter that sums contact closures or voltage transitions. Connection is to the SUM terminal, referenced to GROUND. A contact closure and opening, or a voltage transition rising edge will cause the totalizer to advance by one count. The maximum count allowed is 65535 and the maximum count rate is 5 kHz. Voltages trigger on a low-to-high transition at a nominal threshold of +1.4 volts. A contact debounce feature is available when the instrument is operated through the RS- 232 computer interface using the TOTAL_DBNC command, described in Chapter 4.

Perform the following procedure to make connections to the DIGITAL I/O connector:

1.Remove the connector from the rear panel.

2.Loosen the wire clamp screw for the associated terminal.

3.Feed the wire into the gap between the connector body and the wire clamp.

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Fluke 2635A user manual Digital I/O Connections, Totalizer Input

2635A specifications

The Fluke 2635A is a highly advanced multichannel data acquisition system designed for engineers and technicians requiring precision and versatility in their measurement tasks. This instrument excels in monitoring and capturing data from various sources, making it a valuable tool in laboratories, production environments, and field applications.

One of the standout features of the Fluke 2635A is its ability to support up to 20 measurement channels. Users can simultaneously monitor multiple signals, which is crucial for complex testing scenarios where numerous variables need to be tracked. The device is equipped with a 6.5-digit precision measurement capability that ensures high accuracy and resolution in readings. This level of precision is particularly beneficial in applications such as environmental monitoring, research and development, and industrial process control.

The unit incorporates a variety of measurement modes, including voltage, current, temperature, and resistance, making it exceptionally versatile. The Fluke 2635A not only handles standard signals but also integrates with various transducers, providing extensive compatibility for users engaged in diverse testing applications.

To enhance data management, the Fluke 2635A offers advanced data logging capabilities. Data can be stored internally or transferred to external devices for further analysis. The internal memory can accommodate extensive datasets, which can be crucial in long-term monitoring tasks. Integration with external software enables users to analyze and visualize data effectively, allowing for informed decision-making based on comprehensive results.

The user interface is designed for ease of use, featuring a large, bright LCD display that clearly presents measurements and status information. The device is also equipped with a simple navigation system, allowing users to switch between channels and measurement types without hassle.

In terms of construction, the Fluke 2635A is built to withstand rigorous environments. It features a robust design that ensures reliability and durability, making it suitable for both laboratory settings and field operations. Furthermore, the device supports a wide temperature range, thus enabling usage in diverse conditions.

Overall, the Fluke 2635A is a powerful and flexible instrument that provides precise measurements across multiple channels, supporting a wide range of applications. Its advanced technology, combined with user-friendly features, makes it an essential tool for professionals in various fields. The combination of accuracy, flexibility, and durability solidifies its standing as a trusted choice for data acquisition and monitoring tasks.