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Network Layout Planning
The previous section illustrated some of the technical requirements and physical
layout for Master/Slave networks. When planning your network, it’s equally important
when considering the numbering of relays.
Relays are divided into two types: local and network. The local relays are the relays
inside the master cabinet, and the network relays are the remote or slave cabinet
relays. By default, all relay cabinets are configured for 1-48 "local" relays, and all slave
cabinets without dipswitches are out of the box programmed to start at relay number
49.
No two relays can have the same relay number and there are a limited number of
relay numbers available on a Master/Slave network. In some installations it may make
sense to decrease the number of local relays to only the number of actual relays in
the master cabinet so that the total number of controlled relays per network can be
maximized.
Example 1 - 48 Relay Master, 24 Relay Remotes
A (48) relay master cabinet and a (24) relay slave cabinet is the required equipment
for your project. The number of local relays in the master is by default 48 which
matches the number of local relays, so you’re ok. Also, by default, the (24) relay slave
cabinet starts at relay number 49. Considering the facts of this example, everything is
OK using the default settings. In summary:
• Master Cabinet with (48) relays, relay numbers 1-48 (default)
• Remote Cabinet with (24) relays, relay numbers 49-72 (default)
Example 2 - 48 Relay Master, (2) 24 Relay Remotes
Extend the above example and add a second (24) relay remote cabinet. Remembering
that by default the remote relay cabinets without dipswitches (like the 24) start at
relay number 49, and remembering that we already have relay numbers 49-72 used in
the first remote cabinet, we can conclude that the added remote cabinet must be
configured via USB to start at relay number 73. In summary:
• Existing Master Cabinet with (48) relays, relay numbers 1-48
• Existing Remote Cabinet with (24) relays, relay numbers 49-72
• Added Remote Cabinet with (24) relays, relay numbers 49-96, must be
reconfigured via USB since out of box the default setup is addressed to relay
numbers 49-72 which would have been in conflict with the existing cabinet.
Example 3 - 8 Relay Master, (2) 24 Relay Remotes, (3) 4 Relay Remotes
In order to execute this example, with (68) total relays, it’s required to decrease the
number of local relays in the (8) relay master cabinet so that you can stay within the
(96) relay maximum per master/slave network, relay numbers are contiguous, and
the number of available relays are maximized.
First Let’s look at the "out of the box" configuration:
• (8) Master cabinet, (8) relays, but # of local relays is 1-48
• (24) Remote #1, (24) relays, 49-72 (out of box config)
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