Page 23 of 97 PN: 106417-05
3.10 ALTA, ALTAC, Phantom II, Phantom Combi II Control
Figure 3-16: ALTA, ALTAC, Phantom II, Phantom Combi II Control Modbus RS485 Wiring
The control system has a full featured ability to interface with an Energy Management System (EMS).
The control system allows remote control and monitoring via RS485 Modbus or through direct wiring. The
EMS connection is separate from the Boiler-to-Boiler communication network and may be used
simultaneously. Modbus communication connects to the same RJ45 port that is used by the Boiler-to-
Boiler communication network. Connect one end of the ethernet cable to the control and cut off the other
end of the cable to access the individual conductors. The control is a 3 wire Modbus communication,
labeled as Modbus 2 (MB2) in Table 4-1 below:
Table 3-3: ALTA, ALTAC, Phantom II, Phantom Combi II Termination details
NOTICE: If the first and second pin are orange, the cable is 568B. If the first and second pins are green,
the cable is 568A.
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