ATOP MB5908A Rugged Serial to Ethernet Modbus Gateway
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The MB5908A is an 8-port rack-mount industrial secure Modbus TCP/RTU/ASCII gateway certified to IEC 61850-3 / IEEE 1613 for substation installation. It provides six Fast Ethernet interfaces (RJ45 or SFP), eight software-selectable RS-232/422/485 serial ports running to 921,600 bps, a maximum of 247 Modbus slaves, redundant 24-48 VDC or 100-240 VAC power, and -40°C to 80°C operation.
Substation complianceIEC 61850-3 / IEEE 1613 certified
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- Manufacturer's warranty
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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. Industrial EMC protection, IEC61850-3 compliance, and wide temperature operation capability render MB5908A ready for every mission.
8‑Port IEC61850‑3 Certified Industrial Rack‑Mount Secure Modbus Gateway, DSub‑9 or TB5 connectors, optional 3kV serial isolation, dual power input.
MB5908A specifications
| Serial ports | 8 (MB5908A) |
|---|---|
| Serial connector | D-Sub9 (DB models, supporting only 5-pin RS-232 mode) or 5.08mm 5-pin terminal block (TB models) |
| Serial mode | RS-232/422/485 software selectable |
| Serial port isolation | 3 kV isolation (SiS version only; RS-422/485 only) |
| Baud rate | 1,200-921,600 bps software selectable |
| Data bits / stop bits | 5, 6, 7, 8 / 1, 2 software selectable |
| Parity | None, Odd, Even, Mark, Space |
| Flow control | None, Xon/Xoff, RTS/CTS (RS-232 only) |
| Ethernet ports | RJ45 x 6 (RJ45 version) or SFP x 6 (SFP version) |
| Ethernet speed | IEEE 802.3 10BaseT; 802.3u 100BaseT(X) RJ45 version; 802.3u 100Base-FX SFP version |
| Modbus modes | Ethernet: Modbus TCP server/client (or VCOM); Serial: Modbus RTU/ASCII (master/slave) |
| Maximum clients/slaves | Modbus TCP: maximum 16 clients; maximum 247 slaves |
| Security | OpenVPN client/server or IPsec VPN (peer-to-peer or peer-to-side) up to 37.9Mbps throughput, PPTP, SMTP/TLS |
| Redundancy protocol | 802.1D-2004 RSTP |
| Configuration | ATOP Management Utility, Web UI, Telnet, Console |
| Rated supply voltage | Redundant 24-48 VDC or redundant 100-240 VAC / 100-370 VDC (HV series) |
| Input voltage range | Redundant 19.2-52.8 VDC or redundant 85-264 VAC / 100-370 VDC (HV series) |
| Input current | 0.73 A @ 24 VDC; 0.35 A @ 100 VAC; 0.20 A @ 100 VDC |
| Power consumption | Approximately 20 W |
| Power redundancy | Yes |
| Power connector | 10-Pin Terminal Block |
| Housing | IP30 SPCC housing |
| Dimensions (W x H x D) | 440.6 x 44 x 309 mm (1U rack-mount) |
| Weight | 4 kg |
| Installation | 19" rack mount (rack-mount kit included) |
| Operating temperature | -40°C to 80°C (-40°F to 176°F) |
| Storage temperature | -40°C to 85°C |
| Ambient relative humidity | 5%-95%, 55°C (non-condensing) |
| Safety | EN61010-1, EN 61010-2-201 |
| Substation compliance | IEC 61850-3 / IEEE 1613 |
| Warranty | 5 years |
Specifications taken from the manufacturer datasheet.
Which version do I need?
This document covers both the 8-port MB5908A and the 16-port MB5916A; the figures here are the 8-port MB5908A. Ordering variants: MB5908A (1P1MB5908A0007G, RJ45 Ethernet, DB9 serial), MB5908A-TB (1P1MB5908A0008G, TB5), MB5908A-Sis (1P1MB5908A0009G, isolated), MB5908A-6SFP (1P1MB5908A0001G), MB5908A-6SFP-TB (1P1MB5908A0002G), MB5908A-6SFP-Sis (1P1MB5908A0003G), plus -HV equivalents (1P1MB5908A0004G to 1P1MB5908A0006G and 1P1MB5908A000AG to 1P1MB5908A000CG) for redundant 100-240 VAC / 100-370 VDC input. The 3 kV isolated version supports RS-422/485 only; DB models support only 5-pin RS-232 mode.
Typical applications for the MB5908A
- IEC 61850-3 electrical substation automation
- Rack-mounted conversion of eight serial Modbus RTU/ASCII chains to Modbus TCP
- Six-port Ethernet aggregation with 802.1D-2004 RSTP redundancy
- Secure remote access to serial devices over IPsec or OpenVPN
- Fibre plant using the six-slot 100Base-FX SFP version
- Isolated RS-422/485 serial runs in high-noise switchgear using the 3 kV Sis variant
Complete the stack
Products that work with this one — connect it, power it, and get it online.
MB5908A — frequently asked questions
Is the MB5908A approved for substation use?
Yes. It is IEC 61850-3 certified and its EMC listing includes IEC 61850-3 / IEEE 1613, with safety to EN61010-1 and EN 61010-2-201, so it can be set up into IEC 61850-3 substations.
How many Modbus slaves can it address?
A maximum of 16 Modbus TCP clients and a maximum of 247 slaves, with bi-directional Modbus TCP/RTU/ASCII conversion in which the Ethernet and serial ends can each be set as master or slave.
How many Ethernet interfaces does it have?
Six. RJ45 versions provide 6x 10/100BASE-T(X); SFP versions provide 6x 100Base-FX SFP slots. Listed transceivers are AXFD-1314-0523 (155Mbps multi-mode, 2 km) and AXFD-1314-0553 (155Mbps single-mode, 30 km).
What power supply options are there?
Redundant 24-48 VDC (input range 19.2-52.8 VDC), or redundant 100-240 VAC / 100-370 VDC on the HV series (input range 85-264 VAC / 100-370 VDC), on a 10-pin terminal block. Approximately 20 W.
Can I get isolated serial ports, and what is the trade-off?
Yes, the -Sis versions provide 3 kV serial port isolation, but the isolated version supports RS-422/485 only, not RS-232. Standard versions are software-selectable RS-232/422/485.
How much does the ATOP MB5908A Rugged Serial to Ethernet Modbus Gateway cost in the UK?
The ATOP MB5908A 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 MB5908A Rugged Serial to Ethernet Modbus Gateway?
The ATOP MB5908A 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.
