PELV (Class 2: USA) Wiring
®
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14
CGP2730 MI Wiring:
Power
Indicator
LED
24 V
Input
Module Harness
Connector
Module Interface
Communication LED
Processor
Communication
Link
MI Heartbeat LED
Processor
Communication LED
Manual
Override
Switch
16 to 24 AWG
(1.5 to 0.5 mm
2
)
Wiring
4 - MUX
3 - MUX
1 - COM
To HomeWorks
R
Processor or other
HWI-MI-120
Module Interfaces
LT-1A Terminator (if needed)
NOTE: The LT-1A should
be installed on the LAST
Module Interface (furthest
from the processor).
Note:
2
Program override Scene.
The manual override levels are programmed using the HomeWorks
R
software.
Terminate the processor communication link on the last module interface.
If any of the module interfaces
are located more than 50 ft (15.25 m) from the processor, the last module interface on the chain must utilize a
terminator across terminals 3 and 4. LT-1A terminators that are included with the processor may be used for this
application. If LT-1A terminators are unavailable, a 0.25 W resistor between 100 and 150 ohms may be placed
from terminal 3 to terminal 4 to provide termination. Termination at the processor end of the chain is included on
HomeWorks
R
8 Series processor boards so an LT-1A is not required. On HomeWorks
R
QS processors, link
termination is also required at the processor.
(Recommended) Connect manual override cable to the terminal blocks as shown below.
The manual override scene (as programmed in the HomeWorks
R
software) is activated for all modules connected
to the Module Interface by closing the manual override switch wired between the two terminals. For maximum
reliability, group Module Interfaces on a single switch. This arrangement should have the switch and all of the
Module Interfaces wired in parallel.
2
Proper polarity must be maintained across all units. For manual override cable runs less than 1000 ft
(300 m) connected to a single module interface 16 to 24 AWG (1.5 to .05 mm ) wiring can be used.
For manual override cable runs exceeding 1000 ft (300 m) or those connected to multiple module
interfaces, 16 to 18 AWG (1.5 to 1.0 mm ) wiring must be used. If the installer chooses to use their
own switch, the switch used must be rated for switching at least 50 mA at 28 V . For switching
multiple module interfaces, the switch must be rated for switching the sum of the current for all of the
module interfaces connected (e.g., 6 module interfaces wired to a single override switch would require
a switch rated for 300 mA at 28 V ).
