AAP135-S00/13S00

The Yokogawa AAP135-S00/13S00 is an 8-channel isolated pulse input module designed to receive contact ON/OFF, voltage pulse, and current pulse signals. It supports input frequencies up to 10 kHz and accepts both 2-wire and 3-wire field signal configurations. The /13S00 ordering option specifies a pressure clamp terminal block for pulse signal connections.

Functional Description

The AAP135 receives pulse signals from field devices and transfers the input information to the control system. Its eight channels are electrically isolated from one another and from the system side, allowing signals from separate field circuits to be handled independently.

Supported input signal configurations include:

• 2-wire signals: Contact ON/OFF, voltage pulse, and current pulse.
• 3-wire signals: Power-supply-type voltage pulse.
• Current pulse processing: Current input is converted to a voltage signal internally.
• Dual-redundant configuration: Supported by the module design.

Input Signal Characteristics

The module accepts pulse signals with frequencies from 0 to 10 kHz and a minimum pulse width of 40 us. For voltage and current pulse inputs, the specified high-level and low-level ranges determine the acceptable signal thresholds. The input source resistance must also be considered when selecting field transmitters.

For contact inputs, the module recognizes relay and transistor contact states using specified open- and closed-circuit resistance levels. A configurable filter is available to eliminate contact chattering.

Electrical Input Specifications

The input thresholds distinguish valid pulse states from noise or inactive signal levels. For voltage and current pulse inputs, the current signal is internally converted to voltage before processing.

• High-level voltage (VH): 3 to 24 V DC.
• Low-level voltage (VL): -1 to 8 V DC.
• Minimum voltage swing (VH - VL): 3 V.
• Maximum signal source resistance: 1 kOhm.
• Contact open resistance: 100 kOhm or more.
• Contact closed resistance: 200 Ohm or less.

The module also provides selectable shunt resistance values of none, 200 Ohm, 500 Ohm, or 1000 Ohm. Its 68 kOhm pull-up resistance supports 12 V DC or 24 V DC signal configurations.

Transmitter Power and Signal Conditioning

The transmitter power supply can be selected between 12 V DC and 24 V DC. The corresponding current limiter values are 40 mA at 12 V DC +/-10% and 30 mA at 24 V DC +/-10%.

A configurable filter handles contact chattering. For dry-contact pulse signals between terminals B and C, the specified input frequency range is limited to 0 to 800 Hz rather than the general 0 to 10 kHz rating.

Terminal Connection and Ordering Configuration

The /13S00 option identifies the ATI3S-00 pressure clamp terminal block for pulse signals. This provides a pressure-clamp field wiring interface for connecting the pulse input circuits.

The manufacturer's ordering information identifies the following configuration codes:

Code	Description
-S	Standard type
5	Without explosion protection
E	With explosion protection
0	Basic type
3	ISA Standard G3 and temperature (-20 to 70 deg C) option
/13S00	Pressure Clamp Terminal Block for Pulse, ATI3S-00
/13S10	Pressure Clamp Terminal Block for Pulse with surge absorber, ATI3S-10
/13D00	Dual Pressure Clamp Terminal Block for Pulse, ATI3D-00
/13D10	Dual Pressure Clamp Terminal Block for Pulse with surge absorber, ATI3D-10

Technical Specifications

Parameter	Specification
Model	AAP135-S00/13S00
Brand	Yokogawa
Product Type	Pulse Input Module
Number of Input Channels	8, isolated channels
Input Signal	Contact ON/OFF, voltage pulse, current pulse
Wiring Configuration	2-wire and 3-wire
Input Frequency	0 to 10 kHz
Dry Contact Input Frequency	0 to 800 Hz between terminals B and C
Minimum Input Pulse Width	40 us
High-Level Input Voltage	3 to 24 V DC
Low-Level Input Voltage	-1 to 8 V DC
Minimum Voltage Swing	3 V
Maximum Signal Source Resistance	1 kOhm
Contact Open Resistance	100 kOhm or more
Contact Closed Resistance	200 Ohm or less
Shunt Resistance	None / 200 / 500 / 1000 Ohm
Pull-up Resistance	68 kOhm
Filter	Configurable chattering elimination
Data Update Period	2 ms
Transmitter Power Supply	Selectable 12 V DC / 24 V DC
Maximum Current Consumption	300 mA (5 V DC), 400 mA (24 V DC)
Withstanding Voltage	500 V AC for 1 minute, input-to-system and channel-to-channel
Redundant Configuration	Dual-redundant configuration supported
External Connection	Pressure clamp terminal block, KS cable, MIL connector cable
Terminal Block Option	ATI3S-00
Weight	0.3 kg

Frequently Asked Questions

Q: How many pulse input channels does the AAP135-S00/13S00 provide?

A: It provides eight electrically isolated pulse input channels. Each channel supports the specified contact, voltage pulse, or current pulse input configurations.

Q: What is the function of the /13S00 suffix?

A: The /13S00 option specifies the ATI3S-00 pressure clamp terminal block for pulse signal connections. It identifies the terminal connection configuration rather than an additional input channel.

Q: Can the AAP135-S00/13S00 be used in a redundant configuration?

A: Yes. The AAP135 supports dual-redundant configuration. The module's isolation and shunt behavior are designed to support this arrangement, with the shunt circuit open on the standby side.

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