Johnson Controls MS-VMA1615-0U, Руководство по установке, Страница: 15 / 21

Table 5: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables
Recommended Cable Type
1 Function, Electrical
Ratings/Requirements Terminal Labels Terminal Block/Port Label
0.8 mm to 1.0 mm
(20 to 18 AWG) 2-wire
24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal
24VAC)
HOT 24~
24 VAC Power Supply Common
The -0 models isolate this terminal
from all other commons.
The -1 models only isolate this
terminal from the FC bus common.
COM
1 See Table 4 to determine wire size and cable lengths for cables other than the recommended cables.
2 The SA Bus and FC Bus wiring recommendations in this table are for MS/TP Bus communications at 38.4k baud. For more
information, refer to the ,
MS/TP Communications Bus Technical Bulletin (LIT-12011034) .
Setup and Adjustments
Important: Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
Setting the Device Address
Metasys ® field controllers are master devices on
BACnet ® MSTP (SA or FC) Buses. Before operating field
controllers on a bus, you must set a valid and unique
device address for each controller on the bus.
Set a field controller’s device address by setting the
positions of the switches on the Device Address DIP
switch block at the top of the controller (
Figure 2 ). Device
addresses 4 through 127 are the valid addresses for
these controllers.
The DIP switch block ( Figure 9 ) has eight switches
numbered 128, 64, 32, 16, 8, 4, 2, and 1. Switches 64
through 1 are device address switches. Switch 128 is a
mode switch that enables a field controller to operate on
a ZFR /ZFR Pro Series Wireless Field Bus. Set switch
128 to OFF for all hard-wired SA and FC Bus applications.
Figure 9: Device Address Switches Set to 21
Note: Metasys field controllers ship with Switch 128 ON
and the remaining address switches OFF. This
renders the controllers wired slave devices, which
do not interfere on MSTP Buses and do not
interfere with bus operation. Set a valid and
unique device address on the controller before
applying power to the controller on the bus.
To set the device addresses on a Metasys field controller:
1. Set all of the switches on the field controller’s device
address DIP switch block (128 through 1) to OFF.
2. Set one or more of the seven address switches (64
through 1) to ON, so that the sum of the switch
numbers set to ON equals the intended device
address. See
Table 6 for valid field controller
addresses.
Set the highest number switch that is less than or
equal to the intended device address to ON. Then
continue setting lower numbered switches until the
total equals the intended address. For example, if the
intended device address is 21, set Switch 16 to ON
first, then set Switch 4 ON, followed by Switch 1
(16+4+1=21). See
Figure 9 .
3. Set Switch 128 to OFF for all hard-wired SA and FC
Bus applications.
4. Set a unique and sequential device address for each
of the field controllers connected on the SA or FC
Bus, starting with device address 4.
To ensure the best bus performance, set sequential
device addresses with no gaps in the device address
range (4, 5, 6, 7, 8, 9, and so on). The field controllers
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