YOKOGAWA ALP111-S00

Technical Specifications Channels: 16 pulse/status inputs, grouped in two isolated banks of 8 Input Type: NAMUR (IEC 60947-5-6) or dry contact, selectable per bank Pulse Frequency: 0 Hz to 10 kHz (NAMUR), 0 Hz to 1 kHz (dry contact) Input Voltage: 8 V DC (NAMUR) / 24 V DC (dry contact) Input Current: Approximately 7 mA per channel (NAMUR) Counting Mode: Totalizer (32-bit), rate measurement, or status monitoring Gate Time: Configurable 100 ms, 1 s, 10 s, or 60 s Isolation: Channel-to-channel within bank not isolated; bank-to-bank and bank-to-system isolated, 500 V AC Power Supply: 24 V DC from rack backplane Power Consumption: Approximately 4 W Operating Temperature: 0 °C to 55 °C Storage Temperature: -40 °C to +70 °C Humidity: 5 % to 95 % RH, non-condensing Vibration: 2 G, 10 Hz to 500 Hz (IEC 60068-2-6) EMC: IEC 61000-6-2 / IEC 61000-6-4 Safety Integrity: SIL 2 capable per IEC 61508 (when used in approved architecture)

Functional Features Simultaneous totalizer and rate calculation per channel Configurable debounce and filter for contact bounce suppression Sensor break and short-circuit detection per channel Non-volatile count retention across power cycles Hot-swap support with configuration stored in controller LED indicators for channel status and module health

Application Scenarios Custody-transfer flow metering in oil & gas pipelines and terminals Batch processing with volumetric totalization in chemical and food industries Turbine and positive-displacement meter monitoring in tank farms Encoder and proximity-switch speed monitoring in rotating equipment

Material Composition Housing: Steel and aluminum card cage assembly, powder-coated PCB: FR-4 with conformal coating Input Circuitry: Optocouplers and NAMUR signal conditioners Connectors: Yokogawa proprietary card-edge connector Terminal Block: 40-pin pluggable screw terminal, nickel-plated brass

Structural Features Single-width plug-in card for ProSafe-RS SSC50D / SSC60D rack Front panel with 16 channel LEDs, module status LED, and captive screw Rear card-edge connector for backplane interface Keying pin prevents insertion into incompatible slot Conformal-coated PCB for industrial atmosphere protection

Working Principle Each input channel conditions the field signal through a NAMUR comparator or optocoupler, debounces the transition, and increments a hardware counter. The microcontroller reads counters at the configured gate interval, computes instantaneous rate, and presents both accumulated count and rate to the safety controller over the backplane.

Installation Requirements Install in any available I/O slot of ProSafe-RS safety rack Use shielded twisted-pair cable for pulse inputs; maximum length 1000 m (NAMUR) Ground cable shield at the module end only Wire each bank with a common return; do not mix NAMUR and dry contact in the same bank Tighten terminal screws to 0.6 N·m

Usage Precautions Do not exceed 10 kHz input frequency; counts will be lost Verify NAMUR sensor operating voltage matches module bank setting Clear totalizers only during controlled maintenance; use engineering station function Do not hot-swap module while pulse totalization is active for custody transfer Keep firmware revision consistent across redundant modules in safety loops