Crestron DIN-PWS50 Manuel d'utilisateur télécharger pdf (Page 17)

Crestron DIN-BLOCK DIN Rail Cresnet

Distribution Block

Operations & Installation Guide – DOC. 6670B DIN Rail Cresnet

Block: DIN-BLOCK

•

Cable Length Equation

L = Length of run (or chain) in feet

R = 6 Ohms (Crestron Certified Wire: 0.75 MM (18 AWG))

P = Cresnet power usage of entire run (or chain)

L <

40,000

R x P

Where:

Make sure the cable length value is less than the value calculated on the

right side of the equation. For example, a Cresnet run using 0.75 mm

(18 AWG) Crestron Certified Wire and drawing 20 watts should not

have a length of run more than 101 meters (333 feet). Cresnet HP cannot

be used.

NOTE: All Crestron certified Cresnet wiring must consist of two

twisted pairs. One twisted pair is the +24V conductor and the GND

conductor and the other twisted pair is the Y conductor and the Z

conductor.

Strip and

Tin Wire

When daisy chaining Cresnet units, strip the ends of the wires carefully

to avoid nicking the conductors. Twist together the ends of the wires that

share a pin on the network connector and tin the twisted connection.

Apply solder only to the ends of the twisted wires. Avoid tinning too far

up the wires or the end becomes brittle. Insert the tinned connection into

the Cresnet connector and tighten the retaining screw. Repeat the

procedure for the other three conductors.

Add Hubs

Use of a Cresnet hub/repeater (DIN-HUB) is advised whenever the

number of Cresnet devices on a network exceeds 20 or when the

combined total length of Cresnet cable exceeds 914 meters (3000 feet).

Further Inquiries

To locate specific information or resolve questions after reviewing this

guide, contact Crestron's True Blue Support at 1-888-CRESTRON

[1-888-273-7876] or refer to the listing of Crestron worldwide offices on

the Crestron Web site (www.crestron.com/offices

) for assistance within a

particular geographic region.

To post a question about Crestron products, log onto the Online Help

section of the Crestron Web site (www.crestron.com/onlinehelp

). First-

time users must establish a user account to fully benefit from all available

features.

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Crestron DIN-PWS50 Manuel d'utilisateur Page 17

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