PEAK® OEM 32 24 Volt SMART Equipment Controller Installation Instructions
8
Figure 8: Pin number assignments for SA bus ports on PEAK SMART Equipment Controllers
SA bus port
The SA bus port on the middle left side of the controller (Figure 11) is an RJ-12, 6-position modular jack that
provides a connection for the Bluetooth® Commissioning Converter, the VAV Balancing Tool, specified network
sensors, or other SA bus devices with RJ-12 plugs.
The SA bus port is connected internally to the SA bus terminal block. See Table 7
for more information. The port pin
assignment is shown in Figure 8
.
Modbus terminal block
The Modbus terminal block is a green, removable, 3-terminal plug that fits into a board-mounted jack.
Wire the removable Modbus terminal block plugs on the controller, and wire the other field controllers, in a daisy-
chain configuration using 3-wire twisted, shielded cable as shown in Figure 9. See Table 7 for more information.
The Modbus port communicates as a master Modbus device and connects to the Modbus network, that can consist
of one-to-many subordinate Modbus devices. Each Modbus subordinate device has a unique Modbus Register
table and you must configure it within the application of the PEAK OEM 32 controller. The configuration and
application of the Modbus is identified by the PEAK support team and programmed based on OEM applications.
Figure 9: Modbus terminal block
Power
(15 VDC)
SA Bus +
SA Bus
-
Bus and Power Common
Power
(15 VDC)
SA Bus Bus Port
(RJ-12 Modular Jack)
Bus and Power Common
F
IG
:f
ec
_r
j12
_p
in
ou
t
2
3
4
5
6
1
Cable Shield
Connection
To Next
Device on
the Modbus
Segment
FI
G
:m
d_b
us
_t
er
m
s
Modbus
Terminal
Block Plugs
Terminating Device
on Modbus
Daisy Chained Device
on Modbus
To Next
Device on
the Modbus
Segment
+
CO
M
+
CO
M
