Installation Requirements
10
Wiring Requirements
Table 6 shows general wiring requirements for an iSTAR Edge and its
components.
TABLE 6. Equipment Wiring Specifications
Signal From To
Belden #
or equiv. AWG
#
Prs Shield
Max
Length
Max. Wire
Resistance
RS-485 Comm,
two wire
iSTAR
Edge
RM & I/O
Modules
9841 24 1 Yes 4000 ft.
(1212 m)
103Ω
Power iSTAR
Edge
RM & I/O
Modules
8442/8461 22/18 1 No Range of
600 ft. to
1500 ft.
depends
on AWG
See Note
b
RJ45-Ethernet iSTAR
Edge
Hub, Host N/A Cat 5 or
more
24
2 N/A 328 ft.
(100 m)
8.4 Ω
Supervised
Input
iSTAR
Edge or I8
Input 8442/8461 22/18 1 No 2000 ft.
(606 m)
32Ω
Request-to-exit
(REX or RTE)
iSTAR
Edge or
RM-4/4E
module
Switch 8442/8461 22/18 1 No 2000 ft.
(606 m)
32 Ω
Door contact
(DSM)
iSTAR
Edge or
RM-4/4E
module
Contact 8442/8461 22/18 1 No 2000 ft.
(606 m)
32Ω
Supervised
Input (UL)
Note
a
iSTAR
Edge or I8
Input 9462 22 1 Yes 2000 ft.
(606 m)
32Ω
Relay Control RM-4
module
ARM-1 9462 22 1 Yes 25 ft.
(7.6 m)
.04Ω
Reader Data iSTAR
Edge or
RM-4/4E
module
Proximity/
Wiegand
signaling
read head
9942
9260
Alpha wire
5386C
22
20
18
3 Yes 200 ft.
(60.96 m)
300 ft.
(91.4 m)
500 ft.
(152.4 m)
3.2 Ω (22)
3.2 Ω (20)
3.2 Ω (18)
a. To comply with UL requirements, use shielded, minimum 22 AWG stranded, twisted pair cable for monitor points,
DSMs, and REXs. Use Belden 9462 or equivalent.
b. Calculations are based on a single RM-4 reader with keypad and LCD (250 mA):
Using 22 AWG, distance = 600 ft. (.0165 Ω /ft.)
Using 18 AWG, distance = 1500 ft. (.0065 Ω /ft.)
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