Challenger Series Installation and Quick Programming Manual 23
Install EOL resistors in zone input circuits at the end of the circuit. If an alarm
device is connected, place the EOL resistors at the device’s connections. If a
zone input is not used, you don’t need to connect an EOL resistor if you program
the corresponding input number as type 10 (spare).
Tip: Use sleeves on the resistor leads to prevent accidental shorting.
Depending on the setting of Input Tamper Monitoring in System Options, the
Challenger system reports open- and short-circuit conditions in two ways:
• If Input Tamper Monitoring is set to Yes (default), then open- and short-circuit
conditions are reported as input tampers. This is known as four-state
monitoring.
• If Input Tamper Monitoring is set to No, then open- and short-circuit
conditions are reported as unsealed. This is known as two-state monitoring.
The panel uses the circuit’s resistance to determine the state of the zone input.
Table 2 below lists the expected resistance values for sealed (normal) and
unsealed (active) states for each EOL resistor option.
Table 2: Resistance values for various EOL resistor options
Option Sealed (normal) Unsealed (active)
(default) 10 kΩ 5 kΩ or 20 kΩ
4.7 kΩ 2.4 kΩ or 9.4 kΩ
2.2 kΩ 1.1 kΩ or 4.4 kΩ
6.8 kΩ 3.4 kΩ or 13.6 kΩ
5.6 kΩ 2.8 kΩ or 11.2 kΩ
3.7 kΩ 1.9 kΩ or 7.4 kΩ
3.3 kΩ 1.7 kΩ or 6.6 kΩ
2.0 kΩ 1.0 kΩ or 4.0 kΩ
1.5 kΩ 0.8 kΩ or 3.0 kΩ
1.0 kΩ 0.5 kΩ or 2.0 kΩ
(see note below) 2.2 kΩ 9.0 kΩ
Resistance values for open and short conditions are infinity and zero, respectively. If four-
state monitoring is used, open and short conditions indicate input tamper. If two-state
monitoring is used, open and short conditions indicate unsealed.
The 2K2/6K8 option is not compatible with alarm devices using normally open (NO) alarm
contacts, and will result in the input indicating unsealed when it is sealed.
The following diagrams indicate the placement of EOL resistors in typical
(Challenger) zone input circuits. TS1016LE input terminals are not shown, but
the EOL placement is the same.
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