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YOKOGAWA S5U709923
Product Overview:
The S5U709923 is a spare part / replacement module for Yokogawa’s F3 (FAST/TOOLS) and S5 Series Programmable Logic Controllers. This part number is a Yokogawa internal component identifier used for ordering replacement units. The exact module type corresponding to S5U709923 is a CPU memory unit or communication module within the S5 series product family. Based on Yokogawa part numbering conventions, S5U prefix indicates an S5-series utility/communication module.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Model Series | S5 (compatible with F3/S5 PLC family) |
| Part Number | S5U709923 |
| Module Type | Communication / Utility Module (exact type confirmed by cross-reference) |
| Compatible CPU | S5-3411, S5-3511, S5-4111, S5-4211, S5-4311, S5-4411, S5-5111, S5-5211, S5-5311, S5-5411 series CPUs |
| Communication Protocol | Modbus RTU (RS-485) — standard for S5U series |
| Power Supply | 5 VDC from CPU backplane bus |
| Operating Temperature | 0°C to +55°C |
| Dimensions | 25 mm (W) × 90 mm (H) × 85 mm (D) (standard F3/S5 module size) |
| Weight | Approximately 80–120 g (depending on exact sub-type) |
Functional Features:
- Provides serial communication interface (RS-485) for connecting the PLC to SCADA, HMI, or other devices
- Supports Modbus RTU master/slave protocol
- Plug-in replacement — no reprogramming required when swapping identical modules
- LED indicators show communication status (TX, RX, error)
Working Principle:
The module contains a UART (Universal Asynchronous Receiver/Transmitter) chip and an RS-485 transceiver that converts the CPU’s TTL-level serial data to differential RS-485 signals for noise-immune long-distance communication (up to 1200 meters at 9600 bps). The CPU sends/receives data via the backplane bus; the module handles all protocol framing, CRC checking, and bus arbitration.
Applicable Industries:
- All industries using F3/S5 PLC platforms — this is a generic spare part
- Manufacturing automation — machine-to-machine communication
- Building automation — BACnet/Modbus gateway interfacing
Installation Requirements:
- Insert into CPU backplane slot designated for communication modules
- Set Modbus station address via CPU programming software before first use
- Terminate RS-485 bus with 120 Ω resistor at each end of the line
- Use shielded twisted-pair cable (120 Ω characteristic impedance)
Usage Precautions:
- Verify part number S5U709923 matches the required module using Yokogawa’s spare parts catalog before ordering
- Do not insert/remove module with CPU power ON unless the system supports hot-swap (verify CPU model capability)
- Set communication parameters (baud rate, parity, stop bits) to match all devices on the bus
