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o Check for continuous daisy-chain to all zone controllers. Do not link in a star pattern.
o Check the A / B network polarity on all zones and unit controller; must all be in phase.
o Join all shields at each controller's junction and connect one end only to the ground lug in the central
Unit Controller
panel only (unit controller).
• Check that all (input and output) connections match that of the supplied wiring diagram.
o Check / activate terminating resistor jumpers ("TERM") on each of the controls located at both ends of
the communication network.
• Check that all shielded cables have their shield grounded at the central panel's ground lug.
o The network cable must be shielded and twisted, 2 conductors AWG #24, low capacitance only.
o FASTEN YOUR WIRES TOGETHER AND SECURE THEM TO THE BOX! (TIE-WRAPS, TAPE,
• Check that the multi-conductor control cable to the unit is connected and 24VAC is available.
ETC)
• The control panel's 24VAC power is fed by the RTU.
• Never connect temperature or other sensors using spare conductors of AC carrying control cable, as this might
cause magnetic interference and lead to erratic data reading. Sensors must only use dedicated shielded wiring.
o Check that all (input and output) connections match that of the supplied wiring diagram.
o Check that all shielded cables have their shield grounded at the central panel's ground lug.
o Check that the multi-conductor control cable to the unit is connected and 24vac is available.
o The control panel's 24vac power is fed by the RTU.
o Never connect temperature or other sensors using spare conductors of AC carrying control cable, as
this might cause magnetic interference and lead to erratic data reading. Sensors must use dedicated
shielded wiring.
v.7
REV 7.0.0 / PL-TRA-STARTUP-EN
Network cabling (continued)
Unit controller
M2000 wiring details
M2000 Wiring Details
7
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