Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | 1SNA684252R0200 |
| Brand | ABB |
| Series | ILPH |
| Product Type | Serial-to-Ethernet Gateway |
| Serial Interfaces | RS232, RS485 |
| Ethernet Interface | 10/100BaseT (RJ45) |
| Max Serial Baud Rate | 115.2 kbps |
| Protocol Support | Modbus RTU, Modbus ASCII, Modbus TCP, TCP/IP, SMTP |
| Power Supply | 24 V DC (10-34 V DC / 10-24 V AC) |
| Galvanic Isolation | 750 V DC |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Protection Rating | IP20 |
| Mounting | DIN rail |
| Weight | 0.554 kg |
Product Introduction & Supply Chain Strategy
The ABB 1SNA684252R0200, also referenced as the ILPH RS232-485/ETH, is a compact serial-to-Ethernet gateway designed for industrial communication bridging -1-4. It converts RS232 or RS485 serial data to 10/100 Ethernet, enabling legacy field devices — flow meters, drives, analyzers, and panel instruments — to connect to modern PLCs, SCADA systems, and HMIs. Modbus RTU to Modbus TCP conversion is a primary use case.
Procuring this unit as New Surplus is a TCO-smart decision. OEM list pricing for communication gateways carries a premium. Used or refurbished units are a gamble: internal opto-isolators degrade, EEPROM corruption can cause protocol errors, and undocumented repairs leave you chasing intermittent communication faults. A failed gateway in a Modbus network stops critical process data from reaching the DCS. The downtime cost of tracing and replacing a faulty converter exceeds the price difference between a refurbished unit and a verified new surplus module many times over. This unit comes with a full warranty and zero operational hours.
- 1SNA684252R0200
Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Disconnect power to the DIN rail power supply feeding the gateway.
- Gather tools: small flathead screwdriver, ESD wrist strap, and a device to photograph or document terminal block wiring.
- Critical: Photograph the existing unit’s DIP switch settings (address, baud rate, parity) and terminal wiring before removal. Document the IP address and subnet mask from the configuration software.
Stage 2: Removal
- Label all wires connected to the RS232 and RS485 terminal blocks.
- Remove the wires from the terminal blocks.
- Disengage the DIN rail retaining clip and slide the unit off the rail.
Stage 3: Installation (Clone & Seat)
- Set the DIP switches on the new unit to exactly match the removed unit (baud rate, data bits, parity, stop bits, and node address).
- Mount the new unit onto the DIN rail until the retaining clip clicks.
- Reconnect the wires to the terminal blocks per your photo or label. Double-check RS485 polarity (A/A, B/B).
Stage 4: Power-On & Testing
- Re-energize the power supply.
- Use the configuration software (web interface or utility) to verify the unit’s IP address matches the network configuration.
- Ping the unit’s IP address from the host PLC or SCADA server.
- Monitor link/activity LEDs to confirm active data exchange.
Firmware/Software Versions & Upgrade Notes
This gateway uses onboard firmware managed via a web configuration tool or serial command interface -4-6.
Version compatibility note: The firmware revision determines which protocol modes are available (Modbus RTU/TCP conversion, transparent server/client, SMTP). Verify that the new unit runs firmware version V2.0 or later for full Modbus TCP Slave support.
Critical warning: Do not downgrade firmware to match an older unit if the hardware revision changed. Check the hardware revision label on the side of the unit. We provide the current firmware version on the QC report. Contact our technical support for firmware compatibility verification.
Frequently Asked Questions (FAQ)
Q: Why is this New Surplus cheaper than ABB list price but more expensive than refurbished units?
A: The price reflects the cost of sourcing verified, OEM-origin new units from global inventory. You avoid the OEM’s full retail margin and the hidden failure risk of refurbished stock. It is the optimal point on the price-versus-reliability curve.
Q: Is this module still active or is it EOL?
A: The 1SNA684252R0200 remains in ABB’s active lifecycle support. RS232 and RS485 instruments are still widely deployed in existing plants, making this gateway a stable demand item. Stock levels are maintained for field replacement and brownfield expansion projects.
Q: Can I hot-swap this gateway while the power is on?
A: No. Always disconnect the 24 V DC supply before removal or installation to prevent electrical damage or communication bus faults.
Q: Does replacing this gateway require reloading configuration settings?
A: The IP address, subnet mask, and baud rate settings are stored in non-volatile memory. The replacement unit needs to have these settings configured to match the original unless you physically clone the DIP switches. Always document the full configuration before removal.
Q: What is the warranty period and coverage?
A: The module carries a standard 1-year warranty against manufacturing defects. Coverage applies to the module hardware — not to field wiring, external surges, or damage from improper installation. All units are QC-tested before shipment to verify Ethernet connectivity and serial loopback.
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