5. HARDWARE INTERFACES
5-7
5.7.5
Notice for network connection
With a hub(s), FELCOM251/FELCOM501 can establish a network configuration. If the
hub(s) is connected in loop form, the FELCOM251/FELCOM501 may not function nor-
mally.
Never connect as follows:
Note:
If you install a switching hub that does not have an automatic function to distin-
guish straight/cross (MDI/MDI-X) connections, you will need to select a proper cable:
• Use a straight connection cable for an MDI to MDI-X connection.
• Use a cross connection cable for an MDI to MDI or MDI-X to MDI-X connection.
Generally, it is advisable to use an auto MDI/MDI-X switching hub.
Communication Unit
FB-2001
FB-2001-F19
LAN
Hub
LAN
LAN
LAN
[Hub 1 set]
[Hub 2 sets]
[Hub 3 sets]
Hub
Hub
Hub
Hub
Hub
Communication Unit
FB-2001
FB-2001-F19
Communication Unit
FB-2001
FB-2001-F19
Summary of Contents for FELCOM251
Page 9: ...EQUIPMENT LISTS viii This page is intentionally left blank...
Page 53: ...3 CONNECTING POWER 3 6 This page is intentionally left blank...
Page 85: ...6 STARTING UP THE SYSTEM 6 6 This page is intentionally left blank...
Page 89: ...7 TROUBLESHOOTING 7 4 This page is intentionally left blank...
Page 107: ...D 1 31 Jan 2020 H MAKI...
Page 108: ...4 Feb 2020 H MAKI D 2...
Page 109: ...D 3 29 Jan 2019 H MAKI...
Page 110: ...D 4 31 Jan 2020 H MAKI...
Page 111: ...D 5 18 Feb 2019 H MAKI...
Page 112: ...D 6 18 Feb 2019 H MAKI...
Page 113: ...D 7 25 Sep 2018 H MAKI...
Page 114: ...D 8 12 Dec 2018 H MAKI...
Page 115: ...D 9 10 Sep 2019 H MAKI...
Page 116: ...D 10 10 Sep 2019 H MAKI...
Page 117: ...5 Aug 2013 H MAKI D 11...
Page 118: ...16 Jul 2014 H MAKI D 12...
Page 119: ...D 13 21 Apr 2017 H MAKI...
Page 120: ...D 14 31 Jan 2019 H MAKI...
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