ATOP MB5916A-CT Rugged Serial to Ethernet Modbus Gateway
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The ATOP MB5916A-CT is ATOP's top-of-line redundant Modbus concentrator. It polls Modbus RTU/ASCII slaves on sixteen RS-232/422/485 ports into internal memory for Modbus TCP masters, and can run as a redundant pair with automatic recovery after an Ethernet or serial link failure. It is certified to IEC 61850-3 and IEEE 1613, has six Ethernet ports and operates from -40°C to +85°C.
Concentrator RedundancyPaired units with automatic recovery after Ethernet or serial link failure (500 ms secondary recovery in ATOP's reference project)
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Description
Modbus Gateway supports the four most commonly used communication standards, RS-232/485/422, and Ethernet. The ease-of-use configuration utility provided with Modbus Gateway can quickly select the hardware interface, and easily switch to the existing communication infrastructure. You could set it up via Web Browser, Serial Console, Telnet Console, Windows Utility or through the LCM display in front of the device. Industrial EMC protection makes MB5916A ready for every mission.
16‑Port IEC61850‑3 Certified Industrial Rack‑Mount Secure Modbus Gateway, DSub‑9 or TB5 connectors, optional 3kV serial isolation, dual power input.
MB5916A-CT specifications
| Modbus Function | Redundant Modbus concentrator (top-of-line tier): automatic polling into internal memory, automatic link recovery; Modbus TCP/RTU/ASCII gateway |
|---|---|
| Serial Ports | 16 × RS-232/RS-422/RS-485, full function |
| Serial Interface | DSub9 or terminal block (TB5) |
| Serial Isolation | 3 kV (optional) |
| RJ45 Ports | Up to 6 × 10/100BASE-T(X) (RJ45 option) |
| Fibre (SFP) Slots | Up to 6 × 100BASE-X SFP (SFP option); 6 Ethernet ports in total |
| Redundancy Protocols | RSTP on 2 redundant Ethernet ports; concentrator redundancy with automatic recovery after Ethernet or serial link failure |
| Protocols | Modbus TCP, Modbus RTU, Modbus ASCII |
| Concentrator Features | Customisable register mapping, link status and data timestamp access, exception error handling |
| Modbus Function Codes | 1, 2, 3, 4, 5, 6, 15, 16, plus 43 Read Device Identification (server side only), per ATOP's Modbus protocol specification |
| VPN | Supported |
| Management | Web browser, serial console, Telnet console, Windows utility, front-panel LCM display |
| Relay Output | 1 |
| Input Voltage | 24-48 VDC; 100-240 VAC; 100-370 VDC |
| Power Redundancy | Yes, dual power inputs |
| Mounting | 19-inch rack-mount |
| Ingress Protection | IP30 |
| Dimensions | 440 × 44 × 309 mm (L × H × D) |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +85°C |
| Certifications | IEC 61850-3 / IEEE 1613, CE/FCC, EN 60950-1 and/or EN 62368, industrial EMC protection |
Specifications taken from the manufacturer datasheet.
Which version do I need?
This page covers the MB5916A-CT, the concentrator build of the 16-port MB5916A. ATOP places it at the top of its three Modbus tiers: gateway (e.g. MB5904D, periodic polling), concentrator (e.g. MB5904D-CT, MB5916-CT, automatic polling into memory) and redundant concentrator (MB5916A-CT, paired units with automatic link recovery). The MB5908A-CT is the 8-port equivalent. Compared with the MB5916-CT it adds IEC 61850-3 / IEEE 1613, six Ethernet ports (RJ45 or 100BASE-X SFP options), 3 kV optional isolation on DSub9/terminal-block ports, a 100-370 VDC option, redundant power and -40°C to +85°C. For a redundant pair, order two units.
Typical applications for the MB5916A-CT
- Redundant Modbus concentrator pairs for mission-critical substations
- Low-voltage switchboards with dense Modbus RTU slaves managed from a Modbus TCP SCADA
- Petrochemical and refinery electrical infrastructure needing short failure recovery
- Serving SCADA and engineering workstations with different register maps from the same slaves
- Substation panels requiring IEC 61850-3 / IEEE 1613 equipment from -40°C to +85°C
Complete the stack
Products that work with this one — connect it, power it, and get it online.
MB5916A-CT — frequently asked questions
What makes the MB5916A-CT a redundant concentrator?
Two units are set up as a pair with a redundancy link between them and serial COM links connected to both, and the pair recovers automatically after an Ethernet or serial link failure. Each unit polls the slaves into internal memory and supports link status and data timestamp access.
What performance has it achieved on a real project?
At a petrochemical and refinery complex in Malaysia, MB5916A concentrator pairs joined by a fibre redundancy link managed low-voltage switchboards of around 190 Modbus RTU slaves each. They achieved complete polling of more than 100 slaves with 20 registers each in 600 ms at 19200 bps, and 500 ms secondary recovery when the primary unit failed.
What does the concentrator add over a plain Modbus gateway?
A plain gateway translates each Modbus TCP request into a Modbus RTU/ASCII request on the serial line, which ATOP rates as suited to periodic polling. The -CT concentrator polls the serial slaves automatically with pre-defined commands and mirrors their data into internal memory, so Modbus TCP masters are answered at once without risk of timeouts; it adds customisable register mapping for masters that need different data structures, plus link status and data timestamp access.
How does it differ from the MB5916-CT?
The MB5916-CT is rated -20°C to +70°C with two Ethernet ports, RJ45 serial connectors with 2.5 kV optional isolation and no listed power redundancy. The MB5916A-CT adds IEC 61850-3 / IEEE 1613, six Ethernet ports, DSub9/terminal-block connectors with 3 kV optional isolation, a 100-370 VDC option, redundant power and -40°C to +85°C.
What power inputs does it take?
It has redundant power inputs, and ATOP lists 24-48 VDC, 100-240 VAC and 100-370 VDC supplies for the MB5916A platform.
Which Modbus function codes are supported?
ATOP's Modbus protocol specification lists function codes 1, 2, 3, 4, 5, 6, 15 and 16, plus 43 (Read Device Identification) on the server side. The reference project also used multi-write commands to map different slaves simultaneously.
How much does the ATOP MB5916A-CT Rugged Serial to Ethernet Modbus Gateway cost in the UK?
The ATOP MB5916A-CT Rugged Serial to Ethernet Modbus Gateway is supplied to order and priced on application. Send a quote request and we confirm the price and lead time in writing, usually the same working day. No account is needed. Indiott is a UK distributor invoicing with VAT (PSI Technologies Ltd, VAT GB 730 2340 83).
What is the lead time and delivery cost for the ATOP MB5916A-CT Rugged Serial to Ethernet Modbus Gateway?
The ATOP MB5916A-CT Rugged Serial to Ethernet Modbus Gateway is supplied to order. We confirm the lead time in writing with your quote, before you commit to anything. UK delivery is a flat £14.25 per order ex VAT, whatever the weight or how many items you order. We ship to GB and the EU and provide a VAT invoice with every order.
