OM 1239 8 www.DaikinApplied.com
BACnet communication module
Table 4: BACnet communication module connectors/
terminals
P4 – 1 P4 GND
P4 – 2 + 5 VDC
P4 – 3 SPI SELECT (SPI Select To Communications Board)
P4 – 4 SPI CLK (Master Clock)
P4 – 5 SPI RCV (MOSI)
P4 – 6 SPI XMIT (MISO)
P4 – 7 SRDY OUT (SPI Ready To Baseboard)
P4 – 8 No Connection
P3 – 1 P3 Network Signal +
P3 – 2 Network Signal –
P3 – 3 Reference
P3 – 4 Not Used
lonWorks communication module
Table 5: Lon communication module connectors/terminals
CN_SPI – 1 CN_SPI GND
CN_SPI – 2 + 5 VDC
CN_SPI – 3
SPI_SELECT1_0 (SPI Select To Communications-
Board)
CN_SPI – 4 SPI_CLK_0 (Master Clock)
CN_SPI – 5 SPI_RX_0 (MOSI)
CN_SPI – 6 SPI_TX_0 (MISO)
CN_SPI – 7 SREADY_0 (SPI Ready To Baseboard)
CN_SPI – 8 No Connection
TB1 – 1 TB1 Network Signal A
TB1 – 2 Network Signal B
TB1 – 3 Not Used
Figure 3: BACnet communication module connectors and
terminals
SPI From Base
Controller
Atmel ARM7 MCU W/ Polarsoft
BACnet
Protocol Stack
Power from Base
Controller
RS-485
Transceiver
BAS
SPI Interface
Address Switches
Figure 4: Lon communication module connectors and
terminals
SPI From Base
Controller
Neuron FT 3150 Smart
Transceiver / Flash Memory
Power from Base
Controller
FT-X1
Transformer
Neurowire Interface
MICroteCh III unIt Controller