AAP135-S50/K4A00

The Yokogawa AAP135-S50/K4A00 is an 8-channel pulse input module designed for the FIO (Fieldnetwork I/O) system. It receives and counts pulse signals with an input frequency range of 0 to 10 kHz. Its isolated input channels provide separation between signal channels. The module is supplied with a KS Cable Interface Adapter, model ATK4A-00, for cable interfacing.

Functional Overview

The AAP135 is designed to acquire pulse signals from field devices and provide pulse-count information to the control system. It supports eight input channels, allowing multiple pulse sources to be monitored through one module.

Pulse counting is used where the control system needs to process discrete signal transitions rather than continuous analog values. The specified 0 to 10 kHz input range defines the supported pulse frequency range for signal acquisition.

Channel Configuration and Signal Isolation

The module provides eight isolated pulse input channels. Channel isolation helps separate individual input signal circuits, reducing the direct electrical interaction between channels.

The pulse-counting function makes the AAP135 suitable for interfacing with field instruments that provide frequency or pulse-based outputs. Actual signal compatibility should be checked against the connected instrument's electrical output characteristics.

Ordering Configuration

The complete ordering number is AAP135-S50/K4A00.

• AAP135: 8-channel pulse input module with pulse-counting functionality and a 0 to 10 kHz input range.
• -S: Standard type.
• 5: No explosion protection.
• 0: Basic type.
• /K4A00: Includes KS Cable Interface Adapter, model ATK4A-00.

The option code identifies the specified cable interface configuration. When replacing an existing module, verify the complete ordering number and adapter arrangement rather than checking only the AAP135 base model.

Technical Specifications

Parameter	Specification
Model	AAP135-S50/K4A00
Brand	Yokogawa
Product Type	Pulse Input Module
System	FIO (Fieldnetwork I/O)
Number of Channels	8
Input Function	Pulse Count
Input Frequency Range	0 to 10 kHz
Channel Isolation	Isolated channels
Module Type	Standard type
Explosion Protection	No explosion protection
Basic Configuration	Basic type
Cable Interface Adapter	KS Cable Interface Adapter
Adapter Model	ATK4A-00
Weight	0.3 kg

Frequently Asked Questions

Q: How many pulse input channels does the Yokogawa AAP135-S50/K4A00 support?

A: The module supports 8 isolated pulse input channels. Each channel is intended for pulse signal acquisition and counting within the specified 0 to 10 kHz frequency range.

Q: What is the function of the /K4A00 option?

A: The /K4A00 option specifies a KS Cable Interface Adapter, model ATK4A-00. This adapter should be considered when checking the module's cable interface configuration or planning a replacement.

Q: Does the AAP135-S50/K4A00 provide explosion protection?

A: No. The suffix code 5 specifies a configuration without explosion protection. It should not be treated as an explosion-protected module when selecting equipment for hazardous-area installations.

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