ATOP MB5908 Rugged Serial to Ethernet Modbus Gateway
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The MB5908 is a 19-inch rack-mount industrial secure Modbus TCP/RTU/ASCII gateway with 8 software-selectable RS-232/422/485 serial ports on RJ45 connectors, plus two 10/100BASE-T(X) Ethernet ports in dual-subnet or RSTP redundancy mode. It is powered from 24-48 VDC or 100-240 VAC, consumes approximately 21 W, and operates from -20°C to 70°C.
Serial ports8 (RJ45, software-selectable RS-232/422/485)
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- Ships from the UK
- UK & EU delivery, quoted with your price
- Pay by card or invoice
- Manufacturer's warranty
Questions about this product? Call our UK team: 023 9223 3611
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 MB5908 ready for every mission.
8‑Port Industrial Secure Modbus TCP/RTU/ASCII Gateway with RJ45 connectors, rack‑mount, optional serial port isolation.
MB5908 specifications
| Serial ports | 8 (MB5908) |
|---|---|
| Serial connector | RJ45 RS-232/422/485 software selectable (-N models) or RJ45 isolated RS-422/485 (-SiS models) |
| Serial isolation | 2.5 kV (SiS versions 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, Space, Mark |
| Flow control | None, Xon/Xoff, RTS/CTS (RS-232 only) |
| Ethernet ports | 2x 10/100BASE-T(X) RJ-45 |
| Ethernet speed | IEEE 802.3 10BaseT; IEEE 802.3u 100BaseT(X) |
| LAN mode | Dual subnets or RSTP network redundancy |
| Modbus modes | Ethernet: Modbus TCP server/client (or VCOM); Serial: Modbus RTU/ASCII (master/slave) |
| Maximum clients/slaves | Modbus TCP: maximum 16 clients; maximum 32 slave connections |
| Security | OpenVPN and IPsec (host-to-host or host-to-side) with up to 37.9Mbps VPN throughput, and PPTP |
| Configuration | Atop Management Utility, Web UI, Telnet, serial console, LCM display |
| Rated supply voltage | DC version: 24-48VDC; US-EU version: 100-240 VAC |
| Input voltage range | DC version: 24-48VDC; US-EU version: 90-264 VAC |
| Input current | DC version: 0.54 A @24VDC; US-EU version: 0.21A@100VAC |
| Power consumption | Approximately 21 W (max) |
| Power redundancy | No |
| Relay output | Yes (1) |
| Housing | IP30 SPCC housing |
| Dimensions (W x H x D) | 436 mm x 43.5 mm x 200 mm |
| Weight | 3,000g (8-port version) |
| Installation | 19'' rack-mount (kit included) |
| Operating temperature | -20°C to 70°C (-4°F to 158°F) |
| Storage temperature | -40°C to 85°C |
| Ambient relative humidity | 5%-95% (non-condensing) |
| Safety | EN60950-1:2006; EN62368-1 |
| MTBF | MB5908-DC: 22.74 years; MB5908-SiS-DC: 19.00 years; MB5908-SiS-US/EU: 19.03 years |
| Warranty | 5 years |
Specifications taken from the manufacturer datasheet.
Which version do I need?
This document covers both the 8-port MB5908 and the 16-port MB5916; the values here are the 8-port MB5908 figures. Ordering variants differ by power input and isolation: MB5908-DC (1P1MB590800001G, 24-48 VDC), MB5908-EU (1P1MB590800013G, EU plug), MB5908-US (1P1MB590800003G, US plug), and the isolated MB5908-SiS-DC (1P1MB590800002G), MB5908-SiS-EU (1P1MB590800004G) and MB5908-SiS-US (1P1MB590800014G). UK buyers should specify the EU-plug AC version or the DC version. Note that -SiS models are isolated RS-422/485 only, without RS-232.
Typical applications for the MB5908
- Rack-mounted control rooms consolidating eight serial Modbus device chains
- Converting Modbus RTU/ASCII field devices to Modbus TCP for a SCADA host
- Dual-subnet or RSTP-redundant plant Ethernet backbones
- Secure remote access to serial devices over OpenVPN or IPsec
- Front-panel LCM configuration where no engineering laptop is available
- Isolated RS-422/485 serial runs using the SiS variant
Complete the stack
Products that work with this one — connect it, power it, and get it online.
MB5908 — frequently asked questions
Can I power it from mains or does it need DC?
Either. The DC version takes 24-48 VDC on a 5.08 mm 3-pin lockable terminal block; the US-EU version takes 100-240 VAC (input range 90-264 VAC) on an IEC 60320-1 C14 inlet. Consumption is approximately 21 W maximum. There is no power redundancy on this model.
What connector do the serial ports use?
RJ45. RJ45-to-DB9 cables are listed as accessories, including CBL-RJ45(8P)-DB9(M)-90 (50891781G) and CBL-RJ45(8P)-DB9(F)-90 (50891791G), plus 200 cm and cross-over variants.
What is the difference with the -SiS models?
-SiS models provide 2.5 kV isolation, but they are isolated RS-422/485 only. The standard -N models are software-selectable RS-232/422/485.
How much rack space and weight?
436 x 43.5 x 200 mm in an IP30 SPCC housing, weighing 3,000 g in the 8-port version. The 19-inch rack-mount kit is included.
What is the operating temperature range?
-20°C to 70°C operating and -40°C to 85°C storage, at 5% to 95% relative humidity, non-condensing.
How much does the ATOP MB5908 Rugged Serial to Ethernet Modbus Gateway cost in the UK?
The ATOP MB5908 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 MB5908 Rugged Serial to Ethernet Modbus Gateway?
The ATOP MB5908 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.
