Johnson Controls SNC Series User Manual

Ethernet port
The Ethernet port is an 8-pin RJ45 network port used to
connect the SNC to Ethernet IP networks. You can connect
the SNC to Ethernet networks at 1000, 100 or 10 Mbps.
The maximum allowable cable length is 100 m (328 ft).
Important: There are two active Ethernet ports on
the SNC25151-0x/x and SNC16121-0x/x models that
you can use to daisy-chain BACnet/IP devices. There
is one active Ethernet port on the SNC25152-0x/
x and SNC16122-0x/x models. It is not possible to
daisy-chain BACnet/IP devices on these models.
FC Bus terminal block
The SNC has one Field Controller (FC) Bus terminal
connection. The connection uses the blue 4-pin
removable, terminal block that is labeled FC BUS.
The FC Bus connection is an isolated RS-485 port with
4-pin terminal blocks that can communicate at 76,800,
38,400, 19,200, 9600, or 1200 baud. Use the FC Bus port
to integrate BACnet MS/TP controller networks into the
Facility Explorer system.
Note: The FC Bus is not enabled by default when
shipped from the factory.
The SHD (shield) connection on the FC terminal block is
not connected to any earth ground connection.
SA Bus terminal block
The SNC has one SA Bus terminal block connection. The
connection uses the orange 4-pin SA Bus removable,
terminal block that is labeled SA BUS. Connect the 4-wire
SA Bus cable to the SA BUS terminal block.
USB ports
The SNC features two USB 2.0 host (type A) ports that are
disabled by default. You must activate the USB ports in
the Site Management Portal (SMP). The two USB ports
labeled USB-1 and USB-2 are both configured as hosts
and are independent of each other. Use the USB ports to
connect an integration adapter.
Important: Do not connect any other loads to the
USB ports. For example, do not power cell phones
from the USB ports.
See Accessories ordering information for more
information on the adapters.
Wiring the SNC
Mount the SNC securely before you wire it. For details, see
Location considerations.
CAUTION
Risk of Property Damage.
Do not apply power to the system before checking
all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to
the equipment.
Attention
Risque de dégâts matériels.
Ne pas mettre le système sous tension avant
d'avoir vérifié tous les raccords de câblage. Des
fils formant un court-circuit ou connectés de façon
incorrecte risquent d'endommager irrémédiablement
l'équipement.
WARNING
Risk of Electric Shock.
Disconnect or isolate all power supplies before
making electrical connections. More than one
disconnection or isolation may be required to
completely de-energize equipment. Contact with
components carrying hazardous voltage can cause
electric shock and may result in severe personal injury
or death.
WARNING
Risque de décharge électrique.
Débrancher ou isoler toute alimentation avant
de réaliser un branchement électrique. Plusieurs
isolations et débranchements sont peut-être
nécessaires pour -couper entièrement l'alimentation
de l'équipement. Tout contact avec des composants
conducteurs de tensions dangereuses risque
d'entraîner une décharge électrique et de provoquer
des blessures graves, voire mortelles.
Important: Use this SNC only as an operating
control. Where failure or malfunction of the SNC
could lead to personal injury or property damage
to the controlled equipment or other property,
additional precautions must be designed into the
control system. Incorporate and maintain other
devices, such as supervisory or alarm systems or
safety or limit controls, intended to warn of or
protect against failure or malfunction of the SNC.
F4-SNC Installation Guide 5

Johnson Controls SNC Series Specifications

General

Brand	Johnson Controls
Model	SNC Series
Category	Controller
Language	English