Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Network Standard | TC-net 100 control network |
| Fiber Ports | 8 × MT-RJ optical ports, Line A master |
| Copper Port | 1 × RJ45 for twisted-pair TC-net 100 devices |
| Network Management | SNMP support built in |
| Supported Protocols | PCMP, TCP, UDP, IP |
| Redundancy Pairing | Paired with UTNH23B for dual transmission line setup |
| Supply Voltage | 100–240 VAC |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −40 °C to +85 °C |
| Mounting | DIN rail or cabinet rack mount |
| Enclosure Rating | IP20, cabinet installation only |
| Compliance | CE, industrial control network standard |
Product Introduction
The Toshiba UTNH23A is the master optical shared hub for Line A on the TC-net 100 control network, used with Toshiba V series integrated controllers. It aggregates fiber connections from remote DCS nodes and relays real-time control and status data across the plant network.
It carries one copper port for direct twisted-pair TC-net 100 devices and supports SNMP for network diagnostics. Dual-line architecture using UTNH23A plus UTNH23B isolates single cable faults without breaking control traffic.
UTNH23A
UTNH23A
UTNH23A
Application Scenarios & Field Experience
Legacy TC-net 100 networks depend on matched A/B hub pairs. If the Line A master hub fails, all fiber nodes on that leg drop communication, forcing controller loss and process trips. Generic optical switches cannot substitute, because they do not interpret the native PCMP control protocol.
- Thermal power plant: DCS control network hub for boiler and turbine remote I/O nodes.
- Petrochemical plant: Process unit TC-net 100 fiber backbone for redundant control communication.
- Water treatment plant: Remote pumping station DCS fiber communication aggregation.
- Pulp and paper mill: Machine control network for distributed sequence and analog control loops.
In my experience, a power plant’s UTNH23A failed after years of cabinet temperature cycling. The spare unit was configured with the same switch settings. Once paired with the existing UTNH23B, all remote I/O nodes reconnected within 12 minutes. No boiler control trip occurred.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Origin Inspection: Verify OEM labels, serial marking, port condition, and anti-counterfeit markers against OEM documentation.
- Live Rig Testing: Apply AC supply, confirm power LED status, test MT-RJ fiber and RJ45 port handshake with TC-net 100 simulator.
- Firmware Verification: Read and log firmware revision; match revision to the existing network hub and controller firmware.
- Protocol & SNMP Test: Validate PCMP message forwarding and SNMP trap reporting for link faults.
- ESD-Safe Packaging: Seal in static-dissipative bag, add foam cushion, rigid outer carton, and ESD warning labels before shipment.
Frequently Asked Questions
Q1: Can UTNH23A be used directly in place of UTNH23B? A: No. UTNH23A is designated for Line A, UTNH23B for Line B. They use fixed line assignment. Swap only when you reconfigure the whole dual-line topology. Check the OEM network manual before change.
Q2: What warranty coverage do you provide for this UTNH23A hub? A: We offer 12 months warranty. Warranty covers factory-tested hardware defects; it does not cover fiber port damage, miswired supply, or improper network configuration.
Q3: Can this item ship immediately, or do we need to confirm stock lead time? A: Stock status updates on our website. If marked in stock, shipment can start within 1–3 business days. If inventory is depleted, we will quote confirmed lead time before order lock.
Q4: What happens if firmware revision does not match the rest of the TC-net 100 network? A: Mismatched firmware can cause intermittent link drops, dropped PCMP control messages, or missing SNMP alarms. Do not connect the unit live without a pre-install firmware review. We can supply the revision you specify if available.
Q5: Can I hot-swap the while the DCS network stays online? A: Hot-swap is not recommended for the active Line A master hub. You must switch network traffic to the redundant Line B leg first. Hot-swap without network bypass will disconnect all fiber nodes on Line A and trigger a process trip.
