BACnet MS/TP, TZ Comm Bus, and Power Wiring
24Vac Supply
AI
AO
BO
Cable shield connection (Refer to RS485
network guidelines for proper wiring)
24 Vac
COM
B
A
B
A
BACnet MS/TP
B
A
BACnet MS/TP
BZ424
POWER
SUPPLY:
24 Vac ± 15%
Class 2
24V
24V
ISOLATED
24V
COM
COM
B-
A+
24V
COM
B-
A+
AI1
COM
AI2
AI3
COM
AI4
AO1
COM
AO2
BO1
COM
BO2
BO3
COM
BO4
G
MS/TP
EOL
None
TZ
EOL
I
T V
None
AIRFLOW
LO HI
MS/TP ADDRESS
BAUD RATE
SCAN
ERR / ALARM
SYS
SRV
TOKEN
POWER
ONLINE
ERROR
2A
Fuse
76800 BAUD SHOWN
64
1 2 4 8
16 32
10V
0V
AUTO HAND
AO1
AO2
H A O
BO1
BO2
BO3
BO4
TZxxx
WARNING: Internally, this device utilizes a
half-wave rectifier and therefore can only
share the same AC power source with other
half-wave rectified devices. You CANNOT
connect a BACnet network with other
controllers that have an internal full wave
rectifier circuit with Onyxx LX controllers.
Failure to observe this would result in
damaging the Onyxx LX controllers.
The BZ424 can be powered using a Class 2, 24Vac transformer, or to a 24Vdc power source. If powering from a 24Vac transformer, do not ground
either side of the transformer’s secondary.
For maximum protection from electrostatic discharge or other forms of EMI connect each controller to earth ground using a #16 AWG and keep these
wires as short as possible.
Proper grounding of a controller is important to ensure a high probability of surviving a nearby lightning strike as well as other possible electrical
surges. For details on grounding within control panels, NFPA 79 and UL508A provide the required details.
www.lynxspring.com
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