Brooks Firetracker FT128 CIE - Ex Zone Line Input (EOL Resistor); Zone Line Input (EOL Resistor); Input States; Figure 5 Expansion Board 4580 Top Side Differences

Technical / Programming Manual
FT128 Rev 2.2
24
4.1.1.2 Ex Zone Line Input (EOL Resistor)
This mode must be used when the zone input is intended to be connected to intrinsically
safe devices e.g. intrinsically safe detectors or manual call points via the Galvanic isolator
MTL5061 (2820). The End-Of-Line device is a resistor, 10K (±5 %) with a body surface
area > 230 mm
2
(supplied with Galvanic isolator).
 Max. allowed cable resistance is 40 ohm.
 Max. allowed cable capacitance is 70 nF.
 Total zone line current consumption is < 1.0 mA.
4.1.1.3 Zone Line Input (EOL Resistor)
This mode is typically used in New Zealand where only EOL resistors are allowed. It has
to be used when any of the other types cannot be used (e.g. for some older type of
detectors and not Panasonic detectors). The EOL resistor has the highest zone line current
consumption since the End-Of-Line device is a resistor, 4K7 (±5 %).
 Maximum allowed cable resistance is 50 ohm.
 Maximum allowed zone line current consumption is 2.0 mA.
Note: Older version of 4580 boards PCB9287-2B requires 10K End-Of-Line resistor while
the newer version PCB9287-3A requires 4K7. Table 5 and Figure 5 illustrate the two
distinctive differences between the two PCB versions in both hardware and software.
Table 5 4580 Versions with EOL Values to Use
4580
PCB No.
SW Version
EOL Resistor to Use
Version 1
9287-2B
1.0.x
10KΩ
Version 2
9287-3A
2.0.x
4K7Ω
Figure 5 Expansion Board 4580 Top Side Differences
4.1.2 Input States
Each input will be in one of six different states.