Grounding Requirements; Wiring Requirements - Johnson Controls tyco iSTAR Ultra Installation And Configuration Manual

Grounding Requirements

Wiring Requirements

Signal
RS-485 Comm,
Data Half-
duplex 2 wire
RS-485 Comm,
Power
All preliminary site work is complete.

System power needs to be 12 Vdc. Appropriate circuit breakers must be accessible. Power

supplies must be listed to UL-603 or UL-294.
T
he site is clean and free of dust or other contaminants.

Ensure that the mounting site is ready to accommodate the iSTAR dimensions.

Grounding requirements are as follows:
Ensure that the iSTAR Ultra controller is properly connected to an earth ground at any of

the ground studs.
Ensure that the shield wires are grounded at one end of the cable to the nearest earth/

ground connection. Ground shields of both the GCM and ACMs.
When disconnecting wiring, disconnect ground wires last (to provide maximum

protection to the equipment and personnel.
Disconnect all sourced power before modifying the wiring.
The iSTAR Ultra Ethernet connections are:
GCM Onboard Ethernet ports - support 1 Gbps each.

Ethernet cabling must be CAT-5E or better.
NOTE

Use shielded Ethernet cabling in rack mount configurations.

The input terminals on the iSTAR Ultra accept conductor size up to

2mm
Table 2-2 on page 2-3 lists the general wiring requirements for the iSTAR Ultra and its
components.
From To
iSTAR RM & I/O
Ultra Modules
iSTAR RM & I/O
Ultra Modules
2 (12 AWG).
Table 2-2: Equipment Wiring Specifications
Belden #
or equiv. AWG
9841 24
8442/8461 22/18
iSTAR Ultra Installation and Configuration Guide
Pre-Installation Planning and Requirements
# Max
Prs Shield Length
1 Yes 4000 ft.
(1212 m)
1 Yes Range of
600 ft. to
1500 ft.
depends on
AWG
Max. Wire
Resistance
103
b
See Note
2–3