PLCs, Power Supplies & Others

Functional Role in Automation Systems

This PLC module provides reliable discrete input interfacing for Yokogawa control platforms. It captures digital signals from field devices like pushbuttons, sensors, and limit switches. You can install this unit in distributed I/O racks or local control panels. The module filters electrical noise and contact bounce for accurate data acquisition. It transfers input status to the controller during each scheduled scan cycle. This module supports machine control, process monitoring, and safety interlock applications.

Physical Dimensions and Mounting Options

The Yokogawa D0114RB measures 130.0 mm in height and 38.0 mm in width. Its depth reaches 105.0 mm from the front face to the rear connector. This unit weighs approximately 0.35 kg, enabling simple DIN rail or panel mounting. You can snap the module onto a 35 mm rail using the integrated clip. Alternatively, you may secure it with M4 screws through the mounting holes. The polycarbonate housing provides excellent electrical insulation and impact resistance.

Input Channel Configuration and Ratings

This module features 14 discrete input channels arranged in two isolated groups. Each channel accepts 24 VDC signals with a nominal current draw of 7 mA. The Yokogawa D0114RB offers a field-selectable input filter for noise suppression. You can set each input channel as either sink or source type. The ON-state threshold voltage sits at 15 VDC minimum. OFF-state detection occurs below 5 VDC with built-in hysteresis.

Signal Conditioning and Noise Rejection

Each input channel incorporates an RC filter with a time constant of 3.0 milliseconds. This filter eliminates high-frequency transients and contact bounce effectively. The Yokogawa D0114RB provides 1.5 kV optoisolation between field and logic circuits. This isolation prevents ground loops and protects the backplane from surges. Each channel includes a green LED for visual status confirmation. The input impedance measures 5.0 kΩ across the operating temperature range.

Connection Interface and Field Wiring

An 18-position removable terminal block accepts wires from 0.14 mm² to 1.5 mm². The screw-clamp terminations create gas-tight connections for long-term reliability. You will find separate return terminals for each input group on the block. The module includes a shielded ground terminal for cable drain connections. Clear silkscreen labeling identifies each terminal position for error-free wiring. This arrangement simplifies installation and reduces troubleshooting time significantly.

Internal Circuitry and Component Inventory

The main PCB hosts 14 high-speed optocouplers with 5 MHz bandwidth capacity. You will discover 28 precision resistors with 1% tolerance for accurate current limiting. The Yokogawa D0114RB uses a 5 VDC linear regulator for internal logic power. A total of 72 discrete components populate the double-sided circuit board. These include ceramic capacitors, Zener diodes, and ferrite bead suppressors. The component selection emphasizes noise immunity and extended service life.

Power Consumption and Energy Buffering

This module draws 25 mA from the backplane supply during idle operation. The consumption increases to 55 mA when all inputs receive active signals. An internal 47 µF capacitor bank provides an 8 ms holdup time. This capacitance ensures stable operation during momentary voltage dips. The unit also stores its configuration parameters in a non-volatile EEPROM. This memory retains all settings permanently without requiring battery backup.

Environmental Specifications and Certifications

The Yokogawa D0114RB operates reliably between 0°C and 55°C ambient temperature. It withstands humidity levels from 10% to 90% without condensation issues. The enclosure carries an IP20 protection rating for indoor installation safety. Vibration tolerance reaches 2 G from 10 Hz to 150 Hz on all axes. Shock resistance measures 25 G for 11 milliseconds half-sine pulses. These qualifications suit packaging machinery and assembly line systems.

Technical Data Summary

Diagnostic Features and Status Indication

This module provides individual green LEDs for each channel’s operational status. A channel illuminates when it detects an active 24 VDC field signal. You can also monitor the group health LED for overall module condition. The module runs a power-on self-test to verify internal circuitry. Any communication error with the backplane triggers a system fault notification.

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