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Voicy
Honorary Master
- Joined
- Sep 19, 2007
- Messages
- 11,565
Dear friends,
Background:
I am currently facing a little problem where a client needs 2 generators to communicate via the same CAN link. Usually this is done using 0.5mm² STP cable with 120ohm resistors at each end ... for distances up to 250m.
In rare cases where you need this extended, the control module supplier has a CAN converter which connects the two panels via direct fiber link (ST mode). This works perfectly well and I've used such systems without any issues, but it is limited to a 2km range.
The client currently has an existing fibre link between the two sites for their own ethernet network. We are currently running through this network to have remote monitoring of the one site, even though the generator cannot communicate with other gens on this link.
Problem Statement:
Unfortunately the client's sites are +/-3.5km from each other, so the CAN converters (to fibre) won't do. The manufacturer also confirmed this stating that their CAN protocol is proprietary, so it cannot be relayed via normal fibre switches.
Possible Solution Options:
1) Are there dedicated repeaters available that can pass through fibre to fibre links regardless of the type of protocol in which the data is being transmitted? (e.g. a passthrough for non-ethernet traffic)
2) If not, is it possible to use a fiber port on each end and use some sort of VLAN forwarding/passthrough to extend the fibre converters' range?
I have found some fiber repeaters online, but it still seems to be network based rather than clean signal passthrough, and it also has no mention of the range.
This unit being an example, not necessarily the brand I'd consider using.
Any input or advice or comments on your own experience is greatly appreciated!
Background:
I am currently facing a little problem where a client needs 2 generators to communicate via the same CAN link. Usually this is done using 0.5mm² STP cable with 120ohm resistors at each end ... for distances up to 250m.
In rare cases where you need this extended, the control module supplier has a CAN converter which connects the two panels via direct fiber link (ST mode). This works perfectly well and I've used such systems without any issues, but it is limited to a 2km range.
The client currently has an existing fibre link between the two sites for their own ethernet network. We are currently running through this network to have remote monitoring of the one site, even though the generator cannot communicate with other gens on this link.
Problem Statement:
Unfortunately the client's sites are +/-3.5km from each other, so the CAN converters (to fibre) won't do. The manufacturer also confirmed this stating that their CAN protocol is proprietary, so it cannot be relayed via normal fibre switches.
Possible Solution Options:
1) Are there dedicated repeaters available that can pass through fibre to fibre links regardless of the type of protocol in which the data is being transmitted? (e.g. a passthrough for non-ethernet traffic)
2) If not, is it possible to use a fiber port on each end and use some sort of VLAN forwarding/passthrough to extend the fibre converters' range?
I have found some fiber repeaters online, but it still seems to be network based rather than clean signal passthrough, and it also has no mention of the range.
SFP to SFP Fiber Mode Media Converter | S-4GPT-DSFP | Perle
Perle Protocol and Rate-transparent Media Converters provide conversion between different wavelengths, multimode and single-mode, and dual and single-fiber.
www.perle.com
This unit being an example, not necessarily the brand I'd consider using.
Any input or advice or comments on your own experience is greatly appreciated!