AAP135-S50/13S00

The Yokogawa AAP135-S50/13S00 is an 8-channel isolated pulse input module designed to acquire contact signals and voltage or current pulses for pulse counting and frequency measurement. It supports input frequencies up to 10 kHz, a 2 ms data update period, and selectable 12 V DC or 24 V DC transmitter power. The /13S00 configuration includes an ATI3S-00 pressure clamp terminal block for pulse signals.

Functional Description

The AAP135 receives pulse signals from relay contacts, transistor contacts, and voltage or current pulse sources. Its eight input channels are isolated, with a specified withstand voltage of 500 V AC for one minute between each input and the system, and between channels.

The module supports both 2-wire and 3-wire input arrangements. Two-wire connections accommodate contact ON/OFF signals and voltage or current pulses, with transmitter power available when required. Three-wire connections support power-supply-type voltage pulse signals.

Input Signal Characteristics

The module accepts input frequencies from 0 to 10 kHz, with a minimum input pulse width of 40 us. For voltage and current pulse inputs, current signals are converted to voltage internally. The specified input levels are:

• High level (VH): 3 to 24 V DC.
• Low level (VL): -1 to 8 V DC.
• Signal swing (VH - VL): 3 V or higher.
• Signal source resistance: 1 kOhm or less.

For contact inputs, the module identifies an open state at 100 kOhm or higher and a closed state at 200 Ohm or lower. These thresholds provide the electrical criteria for distinguishing relay or transistor contact states.

Signal Conditioning and Transmitter Supply

The AAP135 provides selectable shunt resistance settings of none, 200 Ohm, 500 Ohm, and 1000 Ohm. The shunt circuit is open when module power is OFF and on the standby side in a dual-redundant configuration. A 68 kOhm pull-up resistance is provided for 12 V DC or 24 V DC operation.

A configurable filter is available to eliminate contact chattering. The transmitter supply can be selected between 12 V DC and 24 V DC, subject to the specified current limit for each voltage setting. These functions allow the input circuit to accommodate different pulse source characteristics without treating all signal types as electrically identical.

Technical Specifications

Parameter	Specification
Model	AAP135-S50/13S00
Brand	Yokogawa
Product Type	Pulse Input Module
Number of Input Channels	8, isolated channels
Input Frequency	0 to 10 kHz
Minimum Input Pulse Width	40 us
Data Update Period	2 ms
Input Types	Contact ON/OFF, voltage pulse, current pulse
Input Wiring	2-wire and 3-wire
Withstanding Voltage	500 V AC for 1 minute
Channel Isolation	500 V AC for 1 minute
Contact Input - Open	100 kOhm or higher
Contact Input - Close	200 Ohm or less
Voltage Pulse - High Level	3 to 24 V DC
Voltage Pulse - Low Level	-1 to 8 V DC
Voltage Pulse - Signal Swing	3 V or higher
Signal Source Resistance	1 kOhm or less
Shunt Resistance	None / 200 / 500 / 1000 Ohm
Pull-up Resistance	68 kOhm
Transmitter Power Supply	Selectable 12 V DC / 24 V DC
Transmitter Supply Limiter	12 V DC +/-10%: 40 mA; 24 V DC +/-10%: 30 mA
Maximum Current Consumption	300 mA (5 V DC); 400 mA (24 V DC)
Contact Capacity	12 V DC supply: 15 V DC, 15 mA or higher; 24 V DC supply: 30 V DC, 30 mA or higher
Filter	Configurable chattering elimination filter
External Connection	Pressure clamp terminal, KS cable, MIL connector cable
Terminal Block	ATI3S-00
Weight	0.3 kg

Terminal Connection and Ordering Configuration

The /13S00 option identifies the pressure clamp terminal block for pulse input, model ATI3S-00. This provides the field wiring interface for connecting pulse signal sources to the module.

The ordering configuration is identified as follows:

Code	Description
-S	Standard type
5	Without explosion protection
0	Basic type
/13S00	Pressure Clamp Terminal Block for Pulse, ATI3S-00

The complete ordering number should be retained when identifying replacement equipment, since the terminal connection option is part of the supplied configuration.

Frequently Asked Questions

Q: How many pulse input signals can the AAP135-S50/13S00 handle?

A: It provides eight isolated input channels. Each channel can receive supported contact ON/OFF, voltage pulse, or current pulse signals, subject to the applicable electrical input conditions.

Q: Does this model support both voltage and current pulse signals?

A: Yes. It accepts both signal types, with current input converted to voltage. The input level, signal swing, and source resistance must remain within the specified limits.

Q: What terminal block is supplied with the /13S00 configuration?

A: The /13S00 option specifies the ATI3S-00 pressure clamp terminal block for pulse input. It should be distinguished from other AAP135 connection options, such as KS cable adapters and dual pressure clamp terminal blocks.

---