TTK FG-ALS Locating Units


  • Available in an attractive wall mounted unit (FG-ALS).
  • The unit can control sense cables up to 150 metres.
  • Visual and Audible indicators for the type of fault (leak or cable break).
  • Two zero volt contact relays provide numerous signalling and centralised monitoring options.
  • RS485 serial link with MODBUS provides a variety of intelligent interfacing options.

TTK FG-ALS Alarm Location System is designed to be used with TTK analog sense cables; FG-ECS, FG-ACS and FG-ECX, FG-ACX to give instant detection of liquid leaks (water, acid or base). A LCD display and three LED’s on the front panel indicate presence of Power Supply (green), Leak Detected (red) or Cable Break (yellow). The FGALS also features an RS485MODBUS/JBUS serial link to integrate to a variety of intelligent monitoring systems. If a leak is detected an audible alarm is triggered. The LCD display on the alarm unit front panel will show the distance in metres to the leak, the red LED is switched on and the leak relay is activated. In the case of cable break an audible alarm is triggered, the yellow LED is switched on and the cable break relay is activated. The SOUND OFF button on the front panel allows manual silencing of the audible alarm. The LED’s and corresponding relays remain activated as long as the fault persists. When the fault is corrected the LEDs and relays return to normal status.


Compatibility Analog sense cables: FG-ECS, FG-ECX, FG-ACS, FG-ACX
Enclosure Type ABS material (rated to UL94HB)
Operating Temperature 0°C to 50°C
Serial Interface Physical Support Optoisolated two-wire RS485
Serial Link Parameters 9600 bauds, 8 data bits, 1 stop, no parity
Supported Protocol MODBUS, functions 3 and 4
Relays Type: Leak + Cable Break 1 SPDT single contact NO-NC
Dry Relay Max. Switching Voltage 125Vac or 220Vdc
Relay Max. Switching Capacity 60W (30V x 2A)
Power Consumption 2VA
Supply Voltage 230Vac / 110Vac — 50/60Hz or 12-24Vac, 15-30 Vdc
Dimensions (W,H,D)  172 x 86.6 x 55 mm

Electrical Information

Power Supply N : Neutral / P : Phase / : Earth
RS485  R1 : COM / R2 : RT+ / R3 : RT-
Cable Break Relay R1 : NO / R2 : COM / R3 : NC
Leak Relay  R1 : NO / R2 : COM / R3 : NC
FG-CLC Leader Cable A : Green wire / B : White wire / C : Black wire / D : Red wire

Identification Codes

FG-ALS Alarm location system unit FG-ALS fixed
FG-CLC Leader cable of 3.5 metres length
FG-ECS, FG-ACS and FG-ECX, FG-ACX Water or acids sensing cable in 3m, 7m, and 15m in length
FG-TMX End termination plug
CFE-100C 100 hold-down clips with adhesive
ES-40 40 tags