Orion System VCM Component - Manual (Page 26)

Component & System Wiring 26
6. The Modular System Manager can connect to any
VAV/Zone controller on the entire system or directly to one
of the Power/Comm board’s modular output connectors
using modular cable. The Modular Service Tool will
connect to any of the controllers using the supplied cable
with DIN connectors on both ends. The connection point
on the controllers is located near the communications
connector.
7. Using 2 conductor shielded cable, connect from the
CommLink’s 3 wire communications connector to one
MiniLink PD’s 3 wire communications connector marked
“Network Loop”. The CommLink’s internal jumper must
be set to “Multi”. The CommLink only needs to be
connected to one of the MiniLink PDs on the system.
8. Using a modular cable, connect from each MiniLink
PD’s modular connector marked “Network Loop” to
the next MiniLink PD’s “Network Loop” modular input
connector using modular cable. Connect all the remaining
MiniLink PD’s in the same manner using a daisy chain or
star ring format.
Notes:
Both power and communications are transferred
from the Power/Comm board to the VAV/Zone
controllers and the Modular System Manager.
Warning: Each Power/Comm board must have its own
24 VAC transformer for its power source. This
transformer cannot be shared with any other board.
Do not ground the transformer that is connected to
the Power/Comm board. The transformer should be
sized for the required VA by using the information
found on page 29 of this manual.
Loops Containing VCM Controllers without VAV/Zone Control-
lers
1. Connect all VCM controllers on the loop in a
daisy chain or star ring format using 18 gauge
minimum, 2 conductor shielded cable for communications.
Install a separate 24 VAC, 8 VA minimum, transformer for
each controller and wire to its transformer using 18 gauge
minimum, 2 wire cable for power. Observe polarity on all
boards.
2. Connect 2 conductor shielded cable from one of the
controller’s 3 wire communications connector to the
MiniLink PD’s 3 wire communications connector marked
“Local Loop”. Use 18 gauge wire for power and observe
polarity on all boards.
3. Connect 2 wire shielded cable from the CommLink’s 3 wire
communications connector to the MiniLink PD’s 3 wire
communications connector marked “Network Loop”. The
CommLink’s internal jumper must be set to “Multi”. Use
the 110 VAC/24 VAC power supply furnished with the
CommLink for its power source. Only one MiniLink PD on
the system should connect to the CommLink. Install a
separate 24 VAC, 8 VA minimum, transformer for each
MiniLink PD and wire to transformer using 18 gauge
minimum, 2 wire cable for power. Observe polarity on all
boards. Each MiniLink PD’s address switch should be set
with a unique address between 1 and 60.
4. Using a modular cable, connect from the each MiniLink
PD’s modular connector marked “Network Loop” to the
next MiniLink PD’s “Network Loop” modular input
connector using modular cable. Connect all the remaining
MiniLink PD’s in the same manner using a daisy chain or
star ring format.
5 The Modular Service Tool will connect to any of the
controllers using the supplied cable with DIN connectors
on both ends. The connection point on the controllers is
located near the communications connector.
6. If your system has other loops that have VAV/Zone
controllers, the Modular System Manager can connect to
any VAV/Zone controller on the entire system or directly to
one of the Power/Comm board’s modular output connectors
using modular cable. If you do not have any loops with
VAV/Zone controllers, the Modular System Manager also is
supplied with a 12 foot modular cable with a modular
connector on one end and stripped wires on the other. If
the Modular System Manager is to be mounted in remote
location, run 18 gauge, 2 conductor shielded cable for
communications from one controller’s 3 wire
MiniLink PD’s in the same manner using a daisy chain or
star ring format.
System Installation