FSL100 Series Flame Detector Quick Start Guide
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Wiring to a 4-20 mA current sourcing PLC An FSL100 detector current sink can be wired to a 4-20 mA non-isolated (sourcing) output of a controller as shown in Figure 4. FSL100 Series Flame Detector Quick Start Guide Standalone wiring Terminal 1 has a blocking diode for reverse polarity protection and a multi-fuse for overcurrent protection Figure 2. Cable gland with and without the cable entry insert Wiring to a control panel The flame detector can be connected to a fire control panel using the current increase principle. The flame detector is connected to the fire panel with three or four core cables, i.e., two cores for the power supply and one or two cores for the loop. An additional core for the manual selftest can be used. The end of line resistor (EOL) is placed between the terminals 15 and 17. The alarm resistor (AL) is placed between terminals 16 and 18. The end of line and alarm resistors should be adapted to the fire control panel. They are approximately the same size resistors that are used when connecting a manual call point to a fire control panel. Figure 1. Wiring diagram (power on - normal) +10 to +28 VDC Manual Self Test Input (>5 s) The 4-20 mA sinking input has the following values: ●● ≥4 mA = Normal operation ●● ≥20 mA = Alarm ●● 2 mA = Optical fault ●● 0 mA = Fault Figure 4. Wiring a current source PLC Wiring to a 0-20 mA controller with sinking input An FLS 100 detector can be wired to a controller with 0-20 mA nonisolated (sinking) input by using the controller’s alarm and fault relays, as shown in Figure 5. Standalone wiring with direct use of relays ●● Use multi-core, shielded, twisted pair cable with earth (ground), depending on the panel and the type of connection. The isolation resistance to ground must be at least 500K ohm. ●● Core size must be 0.5 to 1.5 mm2 (20-16 AWG). Figure 5. Wiring to a PLC or controller with a 4-20 mA sinking input ●● Select the length and diameter of the wires so that the flame detector will have sufficient power under all conditions (normal and alarm) so that the operating voltage is never below 10 VDC, especially when in alarm mode. Values of the detector’s 0-20 mA output: ●● On the flame detector side of the cable, leave a 4 in. (10 cm) loop of spare cable to allow for alignment of the detector. ●● Grounding on the flame detector side: ensure that the screen cannot make an electrical connection with ground or with the electronics in the detector housing. To avoid potential differences (ground loops), ensure that the electronics in the flame detector housing are isolated from local ground. ●● Do not connect more than one detector per loop. The flame detector has a cable gland fitted with an 8 mm insert. Use the cable gland with the insert for cables from 5.5 – 8 mm diameter. Remove the insert for cables of 8 – 13 mm diameter. ●● 4 mA = Normal operation ●● 20 mA = Alarm Figure 3. Control panel wiring ●● 0 mA = Fault; the 0 mA current will change to 20 mA (alarm) if flames are detected while the source is in fault Note that in this configuration two wires are connected to terminal #1. This is forbidden in some jurisdictions so verify that it is in compliance with local regulations. ●● For a PLC the value of the ALARM resistor = Vnominal/20 mA, for controllers refer to the brand related resistor table. ●● For a PLC the value of the EOL resistor = Vnominal/4 mA

Analog Output The detector has three display LEDs: The analog output (0-20mA, stepped, sinking, non-isolated) has these possible values: ●● 0 mA power fault / microprocessor fault ●● 2 mA optical fault ●● 4 mA normal operation Steady green: powered up and in normal operation Steady yellow: fault Blinking yellow: repeated self-test after a self-test fault Steady red: alarm Normal Operation The green LED is on when power is applied and the detector is in normal operation. That LED turns off and the red alarm LED turns on whenever the detector senses an alarm condition. Under default settings,...