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Detailed instructions for use are in the User's Guide.
[. . . ] The wide range makes the CNCS ideally suited for medium and high powered units such as TV sets, video projectors, and power amplifiers. The CNCS provides an isolated relay closure when the average current drawn by a monitored unit exceeds the FULL LOAD preset threshold. A second set of relay contacts determine whether the average current is less than FULL LOAD, but more than no load. [. . . ] 8079C
CRESTRON CNCS
OPTIONAL
AC Current Sensor
AC INPUT
GND
TWISTED PAIR
CNTBLOCK (OR OTHER TERMINAL BLOCK)
G 24
CNMS OR CNRACK(-D)
CRESNET II NETWORK OR EXTERNAL POWER SUPPLY
24+
CNCS
AC OUTPUT
OUT
C P F 24 G G
24+
1 2
CNDIO OR CNIN-16
EQUIPMENT TO BE SENSED
G
Figure 2. CNCS, Hookup Block Diagram
Low Power (Loads such as VCRs)
1. Rotate FULL LOAD POT 15 turns counterclockwise (CCW). Red and yellow LEDs should illuminate.
4. Slowly rotate FULL LOAD POT CW until red LED flashes and relay chatters. Place VCR in "OFF" (i. e. , standby) mode. Slowly rotate FULL LOAD POT CCW and count turns until red LED flashes and relay chatters.
REMOTE
CONTROL
SYSTEMS
3
Specifications subject to change without notice.
DOC. 8079C
CRESTRON CNCS
NOTE
AC Current Sensor
If the LED flash and relay chatter can not be achieved in step 6, start procedure again with step 1. After performing step 4, rotate FULL LOAD POT two turns CCW. Continue procedure with step 5, omitting steps 6 and 7. Rotate FULL LOAD POT CW half the number of turns required in the previous step. For example, if the POT was rotated four CCW turns in step 6, the POT should then be rotated CW two turns for this step. Rotate PARTIAL LOAD POT CW until yellow LED flashes and relay chatters. Rotate PARTIAL LOAD POT two to five turns CCW.
8. 9.
High Power with Partial Power (Loads such as TV Sets)
1. Slowly rotate FULL LOAD POT CCW until yellow LED flashes and relay chatters. [. . . ] 8079C
CRESTRON CNCS
PROGRAMMING:
AC Current Sensor
A basic CNCS SIMPL program is illustrated in figure 4. The sample program illustrates discrete ON/OFF for toggle type IR control.
NOTE
The program example is provided as a sample of CNCS implementation and may not be relevant for every application. An example follows the figure to illustrate the CRESNET II screen display for CNCS signal assignment. [. . . ]
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