Rockwell Automation Allen-Bradley SynchLink 1756-DM Series Design Manual page 71

Installation Guidelines for Fiber Blocks
Follow these guidelines when you plan and install your fiber blocks:
· Observe the environmental specifications for the fiber blocks as
outlined in each installation instruction.
· Avoid electrostatic and electromagnetic fields at installation sites.
· Avoid corrosive and inflammable gases, dust, conductive
particles, oil mist and organic solutions when choosing an
installation site.
· Prevent exposure to water or direct sunlight.
· Mount the blocks in a NEMA type enclosure.
· Allow a minimum of 2in (5cm) space from surrounding
equipment for proper ventilation.
· To maintain proper ventilation, do not mount the modules
upside down.
· Regardless of mounting position, the operating temperature
must not exceed 55°C (131°F) 1.0in (2.54cm) below each block.
· Make sure the bypass switch power is ON when the local
SynchLink node is powered down. If necessary, install the
bypass switch in an individual enclosure.
· Do not exceed the maximum specified length of power supply
and digital input wires. For bypass switch block specifications,
see page A-8.
Publication 1756-TD008A-EN-P - August 2002
7-3