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The DIP switch block 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 controller to operate on a ZFR1800 Series
Wireless Field Bus. Switch 128 must be set to OFF for all hard-wired SA and FC bus applications. Set switch 128
to ON for wireless FC bus applications only.
Note: PEAK field controllers ship with switch 128 ON and the remaining address switches off; this renders the
controllers wired subordinate devices, which do not operate on MS/TP buses, but will not interfere with bus
operation. Set a valid and unique device address on the controller before you apply power to the controller on the
bus.
To set the device addresses on PEAK field controllers, complete the following steps:
1. Set all of the switches on the 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 for valid device addresses.
Set the highest number switch that is less than or equal to the intended device address to ON. Continue to set
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 to ON, followed by switch 1 (16+4+1= 21).
3. Set switch 128 to ON only for controllers on a ZFR1800 Series Wireless Field Bus application. For all hard-
wired SA and FC bus applications, ensure that switch 128 is set to OFF.
Note: Do not connect a controller with switch 128 set to ON to an active (hard-wired) SA or FC bus. When a
controller with switch 128 is set to ON and a device address from 4 to 127 is connected to a wired field bus, the
entire field bus is rendered inoperable until the controller is disconnected or switch 128 is set to OFF.
Refer to the ZFR1800 Series Wireless Field Bus System Technical Bulletin (LIT-12011295) for more information on
device addresses in wireless applications.
4. Set a unique and sequential device address for each of the 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). You do not need to physically connect the controllers on the bus in their
numerical device address order.
5. Write each controller's device address on the white label below the DIP switch block on the controller's cover.
The following table describes the FC bus and SA bus devices addresses for Johnson Controls MS/TP
communications bus applications.
Table 7: SA/FC bus device address descriptions (Part 1 of 2)
Device address
Use on description
0
Reserved for FC bus supervisory controller (not for use on controllers).
(Switch 128 Off)
1 to 3
Reserved for peripheral devices (not for use on controllers).
(Switch 128 Off)
Figure 9:
Device address DIP switch block set
Note: Switch 128 is used to
enable or disable a controller
for wireless operation.
PEAK® IOM57 Input/Output Modules Installation Instructions
to address 21
ON
15
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