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CMM/1V – RS485-glass fiber converter – Low voltage

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CMM/1V is an industrial optical-electrical converter, RS485 to glass optical fiber with Bayonet ST connector, powered by a low voltage supply.

It accepts a wide range of AC and DC voltages, and it is completely Plug&Play, since it does not need any driver nor DIP switch. This RS485 serial converter is Half Duplex and it automatically detects data direction and transmission data rate up to 250 kbps, so it can be easily installed in any new or existing network.

Thanks to its compact 1-module DIN rail housing, it can be easily mounted in an electrical panel.

SKU: CMM/1V Category: Tags: , , , ,
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Description

CMM/1V is an industrial optical-electrical converter, RS485 to glass optical fiber with Bayonet ST connector, powered by a low voltage supply. It can be used to increase the transmission distance of a serial communication, or to isolate different branches of a network. Thanks to its compact 1-module DIN rail housing, it can be easily mounted in an electrical panel. It accepts a wide range of AC and DC voltages, and it is completely Plug&Play, since it does not need any driver nor DIP switch. This RS485 serial converter is Half Duplex and it automatically detects data direction and transmission data rate up to 250 kbps, so it can be easily installed in any new or existing network.

 

Use cases

Optical-electrical converters are typically used to integrate a section of optical fiber in a RS485 low voltage network, in order to increase the transmission distance. They isolate the different branches of a network from electromagnetical interferences (EMI) and voltage surges, like the different floors of a hotel, or various branches of a solar power system. Electromagnetical interferences are fairly common in these environments, so it is good practice to integrate two or more optical-electrical converter to guarantee signal integrity. Furthermore, there are environments where electrical devices are strictly forbidden, such as pools, saunas, fire-risk buildings, so optical fiber is mandatory.

 

Versatility

Optical-electrical converters are available with different combinations of serial standard and optical fiber, or powered by 230 V. CMM/1S and CMM/1Q converters for example accept synthetic optical fiber with a screw connector, or synthetic optical fiber with VersaLink connector, respectively. CRM/1V and CFM/1V are suitable for different serial standards, that is RS232 and RS422. Industrial serial converter CMP/1Q is functionally identical to CMM/1Q, but it is powered by 230 V mains voltage. Every combination of serial standard, optical fiber, and power supply, is however available, while special requests (such as higher data rates) can be made via the contact form.

Technical Specifications

Main features

Power supply

9 – 24 V AC 48/62 Hz

9 – 30 V DC

Power consumption

1 W

Serial transmission data rate

0 – 250 kbps (automatic) – higher data rates on request

RS485

Communication type

Half Duplex on a balanced line, with automatic data direction

Maximum bus voltage

± 60 V – ESD ± 16.5 kV (Human Body Model)

Common mode range

± 25 V DC

Slew rate

Limited, to have an error-free transmission

Bayonet ST (Straight Tip)

Optical fiber type

Glass: 50 / 125 μm – 62.5 / 125 μm

Maximum transmission distance

2000 m

Mechanical features

DIN Rail

1 module

Dimensions

90 mm x 18 mm x 57 mm

Weight

52 g

Working conditions

Degree of protection

IP20

Operating temperature

-20 °C to +50 °C

Storage temperature

-40 °C to +80 °C