Cooper Security i-on 16 Guide d'installation télécharger pdf (Page 10)

i-on40

Page 6

Connecting Keypads to End Station

Cable Type

In general, the control unit requires

standard 7/0.2 un-screened four core alarm

cable for wiring to keypads.

For maximum performance in harsh

environments use twisted pair cable with a

characteristic impedance of 100-120ohms

eg: CAT5 or cable designed for RS485.

Use one pair for data bus A & B. Use the

other pair for 12V & 0V.

Screened cable may prove necessary if the

installation site has equipment that

produces high levels of R.F. (Radio

Frequencies), for example welding

equipment. If screened cable is required,

you should keep to the following guidelines:

1. Avoid earth loops by connecting the

screen on the cable to mains earth at

the end station but not at the keypad.

2. The continuity of the cable screen is

most important and screens MUST be

continuous along the full length of the

cable.

3. If the cable enters any metal enclosure,

ensure the screen is isolated from the

case.

Cable Segregation

Segregate the keypad cabling from any

other wiring, such as mains supply cables,

telephone cables, computer network cables

and R.F. cables. Use cable ties to keep

cables separated.

Keep the keypad cable clear of cables

supplying sounders or extension

loudspeakers.

Cable Configuration and Length

You can connect up to four wired keypads

to the end station. You may connect the

keypads either in daisy chain (serially), or

in star (parallel) configuration at the end

station connector.

250m

terminate

terminate

Star Daisy Chain

100m

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

MENU

A

B

1

4 ghi

7 pqrs

*0#

2 abc

5 jkl

3 def

6 mno

8 tuv 9 wxyz

Figure 11 Keypad Wiring Configurations

For star configurations the cable length

from control unit to the most distant

keypad should not exceed 100m. For a

daisy chain configuration the total cable

length should not exceed 1,000m,

Connection

Figure 12 shows the wiring connections at

the keypad and control unit.

ET B A 12V 0V

Figure 12 Keypad Connection

Temination

The i-on40 data bus uses the RS485

interface. Because of this the ends of the

line in some configurations may be

terminated to improve performance in

electrically noisy environments or where

there are long cable runs. Both control

panel and keypads have a termination link

on their PCBs (see 10 in Fig 3 for the

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

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