User manual

29
Publication 1738-SG001B-EN-P
ArmorPoint I/O
Step 4 - Select:
y
optional accessories, cables, and
cordsets
Selecting Optional Accessories
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1738-EXT1
1738-EXT3
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ArmorPoint 1 meter bus extension unit
ArmorPoint 3 meter bus extension unit
The following rules apply for the 1738-EXT1 and -EXT3 extension units.
y Use as many as four extension units per network adapter, except the 1738-ADNX
adapter.
y Use only one extension unit with the 1738-ADNX adapter if there are fewer than 32
modules on the backplane.
y You must use a 1738-EP24DC or -FPD module immediately after an extension unit:
Use a 1738-EP24DC module if you need additional backplane power because of module
current consumption or after two extension units.
Use a 1738-FPD module for almost all other configurations. The exception is if the
modules in the segment after the extension unit are 1738-IT2IM12, -IR2M12, -OW4M12,
or -OW4M12AC modules, in which case the 1734-FPD is not necessary.
y Do not exceed the rated adapter or 1734-EP24DC module current. Otherwise, the
number or mix of modules used between extension cables does not matter.