azbil FRS50A100 Mounting Subbase

Dedicated mounting subbase for FRS100 series multi-burner combustion safety controllers. Venduto separatamente; controller main unit NOT included.

1. Definizione del codice modello

FRS: Platform for FRS100 series combustion safety controllers

50: Subbase assembly code

UN: Subbase version

100: Standard DIN rail mounting subbase

Compatible main units: FRS100B / FRS100C series burner controllers (per esempio. FRS100C100-2, FRS100C200-2, FRS100C300-2)

2. Functional Description
3. Terminal block for electrical wiring: All wiring for Alimentazione elettrica, flame detection, valve output, alarm and flame signal connects to the FRS50A100 subbase. The controller main unit plugs onto the subbase, enabling convenient replacement and maintenance without rewiring.
4. Opzioni di montaggio: DIN35mm rail mounting or direct screw mounting.
5. Mechanical positioning: The FRS100 main unit latches onto the subbase with locking structure. The main unit can be detached without modifying field cables.
6. Terminal load rating: Matches contact rating of FRS100 controller (250VCA), capable of carrying loads for main fuel valve and alarm circuits.
7. Complete System Composition

Full combustion safety assembly = FRS100 controller main unit + FRS50A100 subbase + flame detector

Optional flame detectors:

Flame rod: C7007A, C7008A

UV ultraviolet flame scanner: C7012A / C7012C

4. Specifiche chiave (System with Subbase)

Alimentazione elettrica: 100VCA / 200VCA, 50/60Hz (determined by FRS100 main unit)

Rated contact: 250VCA, 250VA

Flame signal output: 0~5VDC (Terminals A/B, cavo schermato, massimo. 5M)

Temperatura ambiente: -20~+60°C for single unit installation; -20~+45°C for side-by-side multi-unit mounting

Applicazione: Intermittent combustion equipment (industrial furnaces, boilers, heat treatment furnaces) for flame monitoring, flame failure protection and ignition interlock. Fuel valve cuts off upon abnormal conditions to prevent deflagration.

5. Selezione del modello & Note di sostituzione
6. FRS50A100 is only compatible with FRS100 series. Not compatible with legacy RX series or FRS60 series controllers.
7. When replacing the subbase, terminal definition remains unchanged. Always verify burner sequence (purge time, flame failure response time) defined by FRS100 main unit model; subbase does not alter timing logic.
8. Spare part procurement: FRS100 main unit and FRS50A100 subbase are separate part numbers and must be ordered individually.
9. Risoluzione dei problemi comuni (Subbase Related)

Nessun indicatore di alimentazione: Check subbase power terminal wiring, built-in fuse (inside main unit), and power supply voltage fluctuation.

Unstable flame signal: Poor shielding/earthing on A/B analog signal terminals of subbase; aged flame detector cable.

Valve circuit inoperative: Loose wiring on terminals 3-4 E 3-8 of subbase, contact overload.

azbil FRS50A100 (Subbase) Dimensioni (Unità: mm)

Data extracted from official drawing: FRS50A100 subbase alone

Larghezza: 45 mm (DIN35 standard rail compatible, subbase body width 45mm)

Altezza: 90 mm

Profondità: 35 mm

Peso: ca. 70 G

Assembled Dimensions (FRS100 Main Unit + FRS50A100 Subbase, for cabinet layout)

Larghezza: 45 mm

Altezza: 110 mm

Profondità: 68 mm

Mounting Related Dimensions

1. Sbarra: Compatible with DIN35mm standard rail
2. Subbase screw mounting holes: 2 fori di montaggio, pitch 82mm, M3.5 terminal screws
3. Cabinet clearance: ≥15mm space required above for main unit removal

azbil FRS50A100 Subbase Two Mounting Methods

Metodo 1: DIN35 Standard Rail Mounting (Più comune)

1. Pull down DIN rail latch on the rear side of subbase
2. Hook subbase onto cabinet DIN35 rail, arrow on subbase pointing upward (must be vertically mounted with arrow facing up)
3. Push back latch to lock subbase onto rail
4. Fix subbase first, complete terminal wiring, then insert FRS100 main unit and fasten central locking screw (torque 0.3N·m)

Metodo 2: Direct Panel Screw Mounting (No rail available)

1. Subbase is pre-drilled with 2 through mounting holes; use M4 screws to fasten onto cabinet backplate / mounting plate
2. Coppia di serraggio consigliata: 0.7N·m. Do not over-tighten to avoid cracking subbase housing
3. Keep arrow pointing upward with vertical installation; vietato il montaggio orizzontale o capovolto

Assembly Notes for Main Unit (After subbase installation)

FRS100 controller plugs and latches onto FRS50A100 subbase

Max torque for main unit central locking screw: 0.3N·m

Main unit can be removed without detaching subbase or field cables, convenient for maintenance and replacement

Mandatory Installation Requirements

1. Orientamento di montaggio: Vertical flat surface, arrow pointing upward. Orizzontale, inverted or tilted installation is forbidden, which will compromise flame detection and timing reliability.
2. Ambiente: Keep away from condensation, polvere pesante, strong vibration and high-temperature heat sources.
3. Multi-unit side-by-side installation: Maintain heat dissipation gaps; ambient temperature upper limit will decrease otherwise.

Nota integrativa

All field wiring terminates on the subbase; main unit is only the pluggable module. For on-site maintenance, simply loosen the central screw of main unit and pull it out, subbase and cables remain untouched.

azbil FRS100 Series Full Model List for Multi-Burner Combustion Safety Controllers

Full assembly = FRS100 main unit + FRS50A100 subbase (subbase sold separately). Suffisso -2 denotes revised version, preferito per progetti domestici.

1. FRS100B Series (Standard Sensitivity, Max Power Consumption 3W)

1. FRS100C Series (Standard & High Sensitivity Versions, Max Power Consumption 7W)

III. Associated Spare Parts

1. FRS50A100: Controller mounting subbase (Guida DIN / montaggio a vite, the model you queried)
2. FSP300C100: Flame simulator, used for field verification of FRS100 flame detection circuit

Model Coding Rules for Quick Selection

FRS100: Codice della serie (Multi-burner flame safety relay)

B / C: B=low power consumption; C=higher power consumption and supports high sensitivity models

3rd digit: 1=AC100V; 2=CA200V; 3=AC200V special timing

4esima cifra: 0=standard output; 4=additional alarm auxiliary contact

5esima cifra: 0=normal sensitivity; 5=high sensitivity

-2: Numero di revisione dell'hardware; revised version preferred for domestic projects

Model Selection Guidance

1. FRS100B: Basso consumo energetico, for stable regular flame conditions; high sensitivity not available.
2. FRS100C: Supports high sensitivity variants, suitable for small burners and weak flame signals; higher power consumption.
3. Suffix `4`: Adds one extra auxiliary contact for alarm feedback to upper control system.
4. All FRS100 main units share the same FRS50A100 subbase.
5. Flame detection options: Flame rod C7007A/C7008A, UV scanner C7012A/C7012C

Applicazioni tipiche

Intermittent combustion equipment: Heat treatment furnaces, bogie furnaces, small gas boilers, industrial kilns, multi-burner manual ignition with flame failure safety interlock.

Optional deliverables:

1. Selection table including flame failure response time and purge time
2. BOM template (Modello + Descrizione + Qtà) for purchasing
3. Notes for replacement between FRS100B and FRS100C

Application Scenarios for azbil FRS100C High Sensitivity Models (FRS100C150/250/350, including auxiliary contact versions 154/254/354)

Core feature: Capable of detecting weak flame signals, easier to capture low-intensity flame than standard sensitivity FRS100C. Designed for intermittent manually ignited combustion equipment where flame signal is weak or attenuated by flue gas/dust. Not for 24-hour continuous firing equipment.

1. Condizioni di lavoro tipiche
2. Small Gas Burners / Low-load Holding Fire Conditions

Low-power natural gas / LPG burners with faint holding flame during low-temperature standby; flame rod output signal is low, standard models often trigger false flame-out alarms.

Bogie furnaces, small holding furnaces, aluminum holding furnaces, small melting furnaces with weak flame at low holding temperature.

2. Furnaces with heavy flue gas and dust causing flame signal attenuation

Heat treatment furnaces, carburizing furnaces, degreasing furnaces, deodorizing furnaces, small waste incinerators. Flue gas, carbon black and dust contaminate UV scanner or flame rod and weaken flame signal.

Flame detector cannot be installed facing the flame due to layout restriction, resulting in weak received optical signal.

3. Long detector wiring with signal attenuation

Flame rod / UV scanner is located far away from controller; shielded cable introduces signal attenuation. High sensitivity model can identify lower flame voltage.

Massimo. limite: Shielded cable length ≤10m.

4. Low-NOx retrofit burners with transparent, low-radiation flame

Low-NOx premix burners produce highly transparent flame with weak UV emission. Standard sensitivity controllers often suffer unstable flame signals and frequent false flame-out alarms; high sensitivity version is preferred.

5. Multi-burner furnaces with independent flame monitoring per burner

Each burner of multi-burner furnace is equipped with individual FRS100C high sensitivity controller. Reliable flame failure detection for individual burners with small and faint flame.

2. Industry Equipment Reference List (Direct for selection)
3. Metal heat treatment: Bogie heat treatment furnaces, box annealing furnaces, aluminum melting & holding furnaces, die-casting holding furnaces
4. Environmental protection: Small waste gas deodorizing furnaces, batch-operated small RCO/TO incinerators
5. Industria del rivestimento: Gas batch curing ovens, paint booth drying furnaces
6. Light industry: Food drying furnaces, small ceramic kilns
7. Small process boilers (batch start-stop, non 24h continuous operation)
8. Selection Boundary (Critical to avoid wrong selection)

✅ Adatto: Intermittent, manual ignition, batch-run combustion equipment; weak flame, dusty/flue gas environment, low-NOx premix holding fire.

❌Non adatto:

1. 24-hour continuous combustion equipment (Use AUR series flame relays with continuous self-check function)
2. Heavy fuel oil burners (Heavy oil soot contamination, UV scanner selection must be evaluated carefully)
3. Flame completely blocked with zero UV / ion signal (No controller can detect flame regardless of sensitivity grade)
4. Recommended Detectors

Ionization flame rod: C7007A / C7008A

UV ultraviolet scanner: C7012A, C7035A, AUD100 series

5. Comparison vs Standard Sensitivity Models

Standard sensitivity FRS100C: Sufficient bright and clean flame, conventional gas burners.

High sensitivity FRS100C (150/250/350): Weak flame, heavy flue gas/dust, low-NOx premix, holding fire. Better weak flame detection capability. Nota: Proper shield grounding is mandatory to prevent false flame detection caused by electrical interference.

6. Compatible Subbase

High sensitivity models use FRS50A100 subbase universally. Subbase has no sensitivity grading.