Certain requirements exist for using Cat. 5(e) ScTP cables in a
DeltaV Control Network.
Cable that meets Category 5(e)
specifications can be purchased from Emerson or directly from the manufacturer,
CommScope. Visit the CommScope website for the most current specifications for
Category 5(e) ScTP cable. Additionally, several Belden cable types can be used
as long as they meet or exceed the CommScope 5ES4 category 5e performance and
shielding specifications. The Belden cable can be purchased through Belden
cable distributors. If Belden cable is used, the basic cable installation and
temperature specifications differ from those shown below for Comm/Scope cable .
For Cat. 5(e) ScTP cables
ensure that:
- All cables are made from
screened Category 5(e) cable with a maximum length of 100 m (328 ft).
- Straight-through cables
are terminated with RJ45 connectors to EIA/TIA 568B pin-outs at both ends.
- Crossover cables are
terminated with RJ45 connectors to 568B pinouts on one end and 568A pinouts on
the opposite end.
- Cables used to cascade
switches have an unshielded connector on one end and a shielded connector on
the opposite end.
- Unshielded RJ45 connectors
are used at all workstation connections.
- Shielded cable with
shielded RJ45 connectors are used at all controller connections and all switch
connections to nodes.
Follow these rules during
cable installation to protect the electrical performance of the cables:
- A cable is under
loaded conditions when it is being pulled or is under
pressure. Under loaded conditions do not exceed:
- 25 pounds pulling
tension
- 16 times the Outside
Diameter (OD) of the cable (3.2 inches) for the minimum bend radius while
pulling the cable
- A cable is under
no load or
unloaded conditions when the cable is being placed with no
tension. Under unloaded conditions do not exceed:
- 8 times the OD of the
cable (1.6 inches) for the minimum bend radius
- Under both loaded and
unloaded conditions, do not:
- Install the cable
unless the temperature is between 0°C and 60°C
- Operate cable in
environments outside the operating temperature range of -20°C and 60°C