Overview
Configured for pulse signal acquisition in Yokogawa control system platforms, the Yokogawa AAP135-S00 S2 (AAP135-S00 Pulse Input Module) provides direct physical signal processing for frequency and contact input measurement. The module supports isolated pulse inputs with 8 channels, handling voltage pulse, current pulse, and contact ON/OFF signals.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAP135-S00 S2 |
| Brand | Yokogawa |
| Product Type | Pulse Input Module |
| Origin | Japan |
| Weight | 0.3 kg |
| Dimensions | 3.2 x 10.6 x 13 cm |
| Operating Temp | Not specified |
| Power Consumption | Maximum 300 mA at 5 V DC, 400 mA at 24 V DC |
| Input Channels | 8 isolated channels |
| Input Type | 2-wire contact ON/OFF, voltage pulse, current pulse; 3-wire power-supply-type voltage pulse |
| Input Frequency | 0 to 10 kHz |
| Minimum Input Pulse Width | 40 us |
| Pull-up Resistance | 68 kOhm |
| Data Update Period | 2 ms |
| Isolation Between Input and System | 500 V AC for 1 minute |
| Isolation Between Channels | 500 V AC for 1 minute |
Yokogawa Process Signal Isolation and Pulse Measurement Characteristics
The AAP135-S00 S2 applies channel-to-channel isolation for pulse signal acquisition and system protection. Therefore, each input channel can process field pulse signals while maintaining electrical separation from adjacent channels and the control system.
The module supports direct measurement of contact switching signals, voltage pulses, and current pulses. In addition, the 3-wire power-supply-type voltage pulse mode allows connection with external powered pulse devices.
For Yokogawa DCS applications, the module operates as a discrete frequency measurement interface rather than an analog 4-20 mA input device. The 2 ms data update period enables fast pulse status refresh for monitoring and control functions.
Frequently Asked Questions
Q: What pulse input types does the AAP135-S00 S2 support?
A: The module supports 2-wire contact ON/OFF signals, voltage pulse signals, current pulse signals, and 3-wire power-supply-type voltage pulse inputs.
Q: Does the AAP135-S00 S2 provide electrical isolation?
A: Yes. The module provides 500 V AC isolation for 1 minute between input and system, and 500 V AC isolation for 1 minute between channels.
Q: What is the maximum input frequency range of this module?
A: The AAP135-S00 S2 supports pulse input frequencies from 0 to 10 kHz with a minimum input pulse width of 40 us.
Field Installation Guidelines
- Install the AAP135-S00 S2 according to the Yokogawa system hardware installation manual and approved rack configuration requirements.
- Verify terminal wiring before applying field power to prevent incorrect pulse signal connection.
- Use shielded cables for pulse signal wiring where the installation environment contains electrical noise sources.
- Connect cable shields according to the plant grounding standard to reduce signal interference.
- Separate pulse signal cables from high-voltage power lines and high-current motor wiring.
- Confirm input device output type before configuration, including contact output, voltage pulse, current pulse, or 3-wire powered pulse.
- Check channel assignment and input configuration parameters during commissioning.
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