Single Gang Keypads
Crestron
CNX-B2/B4/B6/B8/B12
8
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Single Gang Keypads: CNX-B2/B4/B6/B8/B12
Operations & Installation Guide - DOC. 8173A
Resistance Equation
R = Resistance (refer to table below).
L = Length of run (or chain) in feet.
PF = Power factor of entire run (or chain).
R < L x PF
40,000
Where:
The required wire gauge should be chosen such that the resistance value
is less than the value calculated in the resistance equation. Refer to the
table below.
Wire Gauge Values
RESISTANCE (R)
WIRE GAUGE
4
16
6
18
10
20
15
22
13
Doubled CAT5
8.7
Tripled CAT5
NOTE:
All 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.
NOTE:
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.
Identity Code
Every equipment and user interface within the network requires a unique
identity code (NET ID). These codes are recognized by a two-digit
hexadecimal number from 03 to FE. The NET ID of each unit must
match an ID code specified in the SIMPL Windows program. Refer to
“Setting the Net ID in Device Settings” on page 17 for details of the
SIMPL Windows procedure.
