Overview
AAP135-S00/K4A00 Yokogawa Pulse Input Module
The AAP135-S00/K4A00 is an 8-channel channel-isolated pulse input module engineered for the Yokogawa CENTUM VP DCS system. It processes contact ON/OFF, voltage pulse, and current pulse signals up to 10 kHz with a 2 ms update period.
Each channel provides 500 V AC isolation between field circuits and system backplanes. The `/K4A00` option integrates the ATK4A-00 KS Cable Interface Adapter for direct field wiring.
Configuration Breakdown
Model Suffix Code & Option Architecture
- AAP135 — Pulse Input Module (8-Channel, 0 to 10 kHz, Channel Isolated)
- -S — Standard Type Signal Processing Specifications
- 0 — Basic Explosion Protection Code: Non-Explosion Proof
- 0 — System Type Designation: Standard Functional Module
- /K4A00 — Option Code: Factory Fitted with ATK4A-00 KS Cable Interface Adapter
- -S — Standard Type Signal Processing Specifications
Technical Parameters
Electrical & Environmental Specifications
| Parameter Category | Specification Metric |
|---|---|
| Manufacturer & Series | Yokogawa CENTUM VP Series |
| Model & Option | AAP135-S00/K4A00 |
| Input Channels | 8 channels, fully galvanically isolated |
| Input Signal Compatibility | 2-wire (contact, voltage/current pulse) / 3-wire (powered voltage pulse) |
| Input Frequency Range | 0 to 10 kHz |
| Min. Pulse Width & Update | 40 µs min pulse width / 2 ms data update period |
| Dielectric Withstanding Voltage | 500 V AC for 1 minute (Input-to-System & Channel-to-Channel) |
| Pulse Input Voltage Levels | VH: 3 to 24 V DC, VL: -1 to 8 V DC (Swing ≥ 3 V) |
| Contact Resistance Levels | Open: ≥ 100 kΩ, Close: ≤ 200 Ω |
| Transmitter Power Supply | Selectable 12 V DC (40 mA limit) / 24 V DC (30 mA limit) |
| Selectable Shunt Resistors | None / 200 Ω / 500 Ω / 1000 Ω |
| Pull-up Resistance | 68 kΩ (at 12 V DC or 24 V DC) |
| Power & Weight Specs | 300 mA (5 V DC), 400 mA (24 V DC); Mass: 0.3 kg |
System Diagnostics & Applications
Target Machinery & Diagnostic Capabilities
- Turbine flowmeter totalization and custody transfer metering systems.
- Positive displacement pump speed tracking and tachometer integration.
- Turbomachinery vibration pulse analysis and high-speed motor shaft pulse counting.
- Continuous monitoring of channel-to-channel short circuits and field loop wire disconnects.
- Automatic shunt resistor isolation upon power-off or standby state in dual-redundant setups.
- Software-configurable chattering suppression filtering for mechanical contact inputs.
Oiltech Controls Limited’s Insight
Field Engineering & Integration Notes
- The AAP135-S00/K4A00 prevents ground loops in complex DCS plants due to its 500 V AC channel-to-channel galvanic isolation.
- The `/K4A00` option simplifies installation by permitting direct plug-and-play KS cable connections to terminal boards.
- Dual-redundancy support automatically opens internal shunt resistors on standby channels to protect field signal fidelity.
- Selecting built-in 12 V or 24 V transmitter power eliminates external power distribution hardware for field flowmeters.
Fulfillment, Shipping & Warranty
Logistics & Procurement
- Includes a standard 12-month full warranty on all module sales.
- Dispatched via global express carriers including FedEx, UPS, and DHL.
- For availability, contact sales via Email at info@oiltechcontrols.com or WhatsApp at +86 158 8020 0923.
Frequently Asked Questions (FAQ)
Field Selection & Troubleshooting Guide
Q: How do I configure the AAP135-S00/K4A00 module to read 4-20 mA pulse signals?
A: Select the internal shunt resistance (200, 500, or 1000 Ω) in system software to convert current pulse inputs into measurable voltage pulse signals.
Q: What causes count loss when connecting dry contact switches to the AAP135-S00/K4A00?
A: Contact bounce causes switch chatter. Enable the configurable software filter in CENTUM VP builder software to smooth out high-frequency contact bounce.
Q: Can the AAP135-S00/K4A00 module be hot-swapped during dual-redundant operation?
A: Yes, redundant modules can be replaced without interrupting field loop power or signal acquisition on the partner card.
Q: Why is the `/K4A00` suffix code important for cabinet retrofit projects?
A: It designates the factory-installed ATK4A-00 adapter interface, allowing direct ribbon or KS cable coupling to field wiring blocks.
Q: Who can I contact for urgent technical support or hardware quote requests?
A: Contact Oiltech Controls Limited via Email at info@oiltechcontrols.com or message us on WhatsApp at +86 158 8020 0923.
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