Datasheet
Network Repeater Module
RPT / DIN / STD / ...
Main Features Used to extend network when limits are exceeded Sub-divides network into multiple segments and boosts signals Electrically isolates segments Each segment up to max 500m cable length and/or max 64 nodes Each segment must have one Terminated Power Supply

Description of Features

All SeaChange modules are connected together on a common communications network so that they can exchange information and talk to a PC based Graphical User Interface such as Doorway.

There are limits on the length of the network and the number of Modules you can have on one part of the network; you may need to split it into multiple segments when designing and installing the network.

Cable length - each network segment can be up to 500m long using only the approved cable (Belden 8205).

Maximum number of modules - the Maximum Number of Modules per network segment is limited to 64. The network should be divided with repeaters if there are more than 64 modules. Note that power supplies and Repeaters count as modules with respect to this network loading.

If the system to be installed exceeds one or more of these limits then the network must be sub-divided up into segments (each of which must follow these rules) using Repeater Modules. These provide electrical isolation between network segments although communications messages travel seamlessly from one segment to another.

Each segment must have its own power supply(s). One Terminated power supply (PSU/.../TER) only per segment. All subsequent PSU's on any given segment must be Unterminated power supplies (PSU/.../NOT).

Any number of repeaters can be used in a network but there can be no more than 4 repeaters between any two modules on the network. In practice most large buildings are cabled using a backbone segment that also includes the main plant with a repeater per floor (as shown above). In multi tenanted buildings this has the added advantage of providing electrical isolation between the various tenant systems.

Repeater Modules do not need to be registered nor have an address allocated to them.

Repeater Modules do not have any Configuration parameters.

See the examples in Section 7 of our Design Guide publication (available by post, or to see it on line go to the 'Design' option on the top menu above) for examples of single and multiple segment systems.

Options and Product Codes

Network Repeater Module

RPT / DIN / STD / [ option]

Options

SC Controls Ltd

PO Box313
Wadhurst
East Sussex
TN5 6JL

phone 08707 606040
fax 08707 606041
e-mail seachange@sccontrols.co.uk
http:// www.seachange.co.uk