Intrinsically Safe Installation (6295-6296) - Panasonic 6295 Manual

6295-6298 ENCLOSED HEAT DETECTOR - FIRE ALARM SOLUTIONS TECHNICAL DESCRIPTION
5.2.

INTRINSICALLY SAFE INSTALLATION (6295-6296)

Screen wire termination is not provided.
Alternative A
Exp. Board 4580
EX zone line input
Galvanic Isolator / Barrier unit **
1 (+)
Zone Zone
2 (-)
**
Alternative B
4461
In2+
In2-
N.C.
COM loop
N.C.
Re1a
Re1b
Z/In0(+)
Z/In0(-)
In1(+)
In1(-)
Re0a
Re0b
If cable screen is used, it should be connected to the closest earth point (protective earth) outside the
hazardous (Ex) area and should be capable of withstanding a test voltage (500 V AC) for one minute.
Do not clean by rubbing or with solvents to avoid electrostatic hazard.
Do not install in a continuous dust flow to avoid propagating brush discharges.
Channel
Uo<=Ui (=30V)
Io<=Ii (=40mA)
Co > = Ci x 5 (15nF)
Lo >= Li (0 H)
2822
J1 J2
1
2
3
4
1+
2-
24 V DC
Interconnecting cable
Hazardous (Ex) area
A+, B-
Ui = 30 V
Ii = 40 mA
Ci = 3 nF
Li = 0 H
6295-6296
Alternative A:
The conventional IS detectors are connected via a galvanic
isolator / barrier unit to an expansion board 4580 zone line
input.
The zone line input is programmed as:
Ex zone line input (EOL resistor).
End-of-line resistor 10K.
Alternative B:
The conventional IS detectors are connected via a galvanic
isolator / barrier unit to an addressable isolated zone
interface 2822 that is connected to an I/O unit 4461 zone line
input.
The I/O unit 4461 require an Addressable Isolated zone
interface 2822 with PCB 2823 revision ≥ 2.
End-of-line resistor 8K2 is supplied with 2822.
9
End-of-line device
Zone line
6295-6296