Spirax Sarco GS25039-1-10-1810-FC Process Controller

Marque: Spirax Sarco

Belongs to the GS-X series new-generation PID process controller (steam dedicated), used for closed-loop PID control of temperature, pressure and level in steam systems, supporting Industry 4.0 / IIoT and Ethernet communication. No official public document provides a full decoding table for this complete part number. GS25039 is the base material number. The subsequent -1-10-1810-FC stands for custom options, E/S, sortir, firmware version and certification suffix, which are internal order codes. You need to submit the full model number to Spirax Sarco China channels to obtain the original factory selection sheet.Input accuracy: 0.1% FS, high stability for temperature / pressure measurement, suitable for steam, eau chaude, heat exchange station, sterilization and clean steam applications

Heat exchange stations, steam desuperheating and pressure reduction, clean steam, stérilisateurs, hot water temperature control, boiler TDS / blowdown control, condensate recovery system regulation.

Spirax Sarco GS25039 (GS-X Series, Document Reference: TI-P794-01 / IM-P794-03)

Remarque importante: GS25039-1-10-1810-FC is a factory pre-configured FC version. Terminal layout follows the general GS-X base board, while I/O modules (-1, -10) are order-selected options. Always refer to the terminal label printed on the back of the controller itself for on-site wiring. The general terminal definitions below shall not replace the nameplate of this unit.

1. Standard Terminal Wiring Definition (General GS-X)

Bornes d'alimentation

L / N: AC power supply 100–240 V AC wide range

Protective earth PE: Instrument shield ground. Connect the shield of sensor cable only to this terminal at the controller side; do not ground both ends.

Avertissement: Low voltage sensor loops (PT100, 4–20 mA) must not be connected with 220 V AC and shall be isolated.

Sensor Input (IP1 Primary Input, IP2 Auxiliary Input)

PT100 (3-wire RTD, most common for temperature)

IP1+, IP1-, IP1-R: 3-wire RTD. Use shielded instrument cable for long runs and keep wire resistance balanced.

4–20 mA transmitters (pression / niveau)

IP1+ / IP1-: Signal actuel. The controller provides isolated 24 V DC transmitter supply (SU+, SU-) and can directly power Spirax Sarco pressure / transmetteurs de température.

Thermocouple: IP1+, IP1-. Cold junction compensation parameters need to be set.

Digital DI (DIO1, DIO2)

Dry contact digital input (valve feedback, external interlock, remote start/stop), passive contact with internal pull-up.

Sortie de contrôle (OP1 / OP2 for main PID output, OP3 alarm relay)

Suffixe -10 in your model typically means isolated 4–20 mA analogue output (D1) for driving valve positioners such as SP7.

OP1+ / OP1-: 4–20 mA control output (isolé), connected to valve positioner

OP3 (COM / NON / Caroline du Nord): C-type alarm relay for high/low limit alarm and fault interlock

Other optional output types: Relais (R.), bidirectional thyristor (T), logic output (L), determined by order code.

Communication

RS485: UN / B, Modbus RTU

Ethernet RJ45 port: Native high-speed Ethernet for iTools configuration, SCADA and IIoT upload. FC pre-configured units usually come with preset IP address.

Wiring Specification Notes

1. Separate sensor cables and power cables in different cable trays to avoid interference.
2. Shield cable rule: Shield grounded only at the controller end; leave the sensor end floating.
3. Couple de serrage des bornes: 0.4 N·m, conductor cross-section: 0.5–1,5mm²
4. Éteindre avant le câblage. Verify I/O configuration and rear label before power-on. FC factory-configured units may differ from standard templates.
5. Troubleshooting Checklist for GS-X Steam PID Controller

Pre-operation: Back up parameters first. Use Spirax iTools software for backup to avoid configuration loss.

1. Steam-Specific Troubleshooting for GS-X
2. Desuperheating / heat exchange: PV fluctuation should first check blocked sampling pipe, condensate accumulation and sampling point in turbulent zone, not controller fault.
3. Valve position feedback: If valve position feedback is fitted, check 4–20 mA feedback loop; broken feedback will trigger valve position fault alarm.
4. FC = Factory Configured: Steam dedicated logic preloaded at factory. Do NOT reset to factory default, otherwise custom steam control logic will be lost and only Spirax Sarco can reissue configuration file.
5. Safe Maintenance Sequence
6. Isolate power, apply lockout-tagout
7. Inspection visuelle (bornes, câbles, condensation; high humidity in steam room easily causes terminal corrosion)
8. Continuity and insulation test
9. Inject simulated signal separately to distinguish sensor fault or controller body fault
10. Read alarm logs via iTools (alarm log is the most reliable fault source)
11. Check alarm code table first if alarm code exists

Spirax Sarco Full Product List (Sorted by Category, including GS-X)

Application scope: Complete steam & condensate system products, including steam trapping, pressure reducing, regulating, heat exchange, mesure, automation, clean steam, boiler auxiliary and compressed air products, for selection, spare part lookup and replacement reference.

1. Steam Traps
2. Float type F series: FT14, FT44, FT47, FT57, FTS14, FTC series
3. Thermodynamic TD series: TD32, TD42, TD52, TD32F, BTD52, UTD26
4. Thermostatic BT/MST series: MST21, BT6-B, BT6-M (hygienic clean steam), BTM7, BTS7
5. Pressure balanced: BP series
6. Pompe & trap integrated automatic pump: APT14, APT14HC, PPC series
7. Trap station assembly: STS17.2, 4-bolt integrated trap station
8. Pressure Reducing Valves & Self-acting Control Valves
9. Direct acting pressure reducing valves: SRV461S, SRV463S, BRV, DRV series
10. Pilot operated pressure reducing valves: 25P., 26P., 44, DP27, DP143, CP30, PRV series
11. Self-acting temperature control valves: TV, TS series (no controller required for steam heat exchange temperature control)
12. Desuperheating & pressure reducing assembly DS series, injection desuperheater, venturi desuperheating module
13. Électrique / Pneumatic Control Valves, Actionneurs & Positioners
14. Valve bodies

Spira-trol K/L 2-way valves (KE71/KE73/LE43/LE63/KE61)

QL series 3-way valves (mélange / diverting)

85, 86, 89 micro-flow, 1000 série, 900 3-chemin, 2003 high-pressure PRV, Revel high differential pressure labyrinth valve

STERI-TROL hygienic clean steam valves SAE6/SHE6/SQL6 (pharmaceutical clean steam)

1. Pneumatic actuators: PN9000, PN5700/6700, TN2000
2. Electric actuators: AEL5, AEL6, EL4600
3. Valve positioners: SP7 (Smart HART), EP500 (Electro-pneumatic positioner)
4. PID Controllers, Instruments & Monitoring Systems (GS-X included)
5. GS-X series (GS25039 is this series, new steam dedicated PID with Ethernet IIoT)
6. SPC3x single-loop PID controller (version simplifiée)
7. Flow computer M850
8. Spiratec on-line steam trap monitoring system
9. B850 boiler house energy monitor
10. SIMS system management software (iTools configuration tool)
11. Level switch, magnetic level gauge, température / pressure transmitters
12. Flow Meters
13. Gilflo ILVA, ILVA20 differential pressure steam flowmeter
14. VIM20, VLM30 Food+ hygienic vortex flowmeter
15. RIM20 insertion variable area flowmeter
16. TVA/TFA target flowmeter
17. ELM electromagnetic flowmeter
18. MVT10 flow acquisition system
19. Condensate Recovery, Pompe & Flash Systems
20. FREME flash recovery system
21. EVC exhaust condenser (waste heat recovery)
22. Pressure powered condensate pump: P series, APT pump trap
23. Boiler feed tank system, blowdown system BBV bottom blowdown valve
24. Condensate heat unit EasiHeat DHW / EasiHeat HTG (hot water package)
25. Heat Exchangers
26. Turflow corrugated tube heat exchanger
27. SC20 sample cooler (boiler water sampling)
28. Clean steam heat exchanger, sterilization heat exchange module
29. Safety Valves, Isolation Valves & Pipe Fittings
30. Safety relief valve SV series, SRV safety relief valve
31. Bellows seal globe valve BSA3BD, SafeBloc DBB3 double block and bleed valve
32. Check valve CV, CVS10M hygienic check valve
33. Ball valve M10s, Y-filter, basket filter, clean steam filter FS-HC
34. Air vent AE30, air vent for water system
35. Trap test valve, isolation valve set, sampling valve set
36. Clean Steam / Hygienic Range (Pharmaceutique, Bio, Nourriture)

BT6-B / BT6-M hygienic steam trap

STERI-TROL control valve

CVS10M hygienic check valve

VLM30 food grade vortex flowmeter

Clean steam filter station, pure steam sampling module

1. Compressed Air Products (Spirax-Monnier sub-brand)

MF micro filter, ML3 oil mist separator, IL1 lubricator, air regulator, dryer accessories

1. Boiler Auxiliary & Water Treatment Monitoring

Boiler blowdown valve, TDS blowdown control module

Turbidity monitoring system, feedwater chemical dosing package

B850 boiler energy monitor

1. Steam Humidifiers & Steam Injection Systems

Steam humidifier, injection humidification module, venturi steam injector

Quick Index Guide

Prefix GS → GS-X controller (GS25039)

Prefix TD → Thermodynamic trap; FT → Float trap; BT → Hygienic thermostatic trap

AEL → Electric actuator; SP7 / EP500 → Positioner

ILVA / VIM / VLM → Flow meter

KE/LE/QL → Spira-trol control valve body

Spirax Sarco GS-X Series Controller List (TI-P794-01 Official Reference)

GS-X includes three main hardware platforms: GS-X1 / GS-X2 / GS-X3. Your GS25039 is the GS-X3 base part number. Suffixes are extended order codes for I/O, communication, firmware and factory configuration and are not independent hardware part numbers.

Documents: TI-P794-01 (Datasheet), IM-P794-03 (Installation & Operating Manual)

1. Base Hardware Models (3 Espèces)

✅ GS25039 = GS-X3 base part number

Full order format:

GS25039 [InputCode] [OutputCode] [Micrologiciel] [Suffixe]

Exemple: GS25039-1-10-1810-FC (FC = Factory Configured)

1. GS-X I/O Selection Order Codes (Couramment utilisé)

Coding rule: GSxxxx InputCode OutputCode Firmware Suffix

Input Code

1: Universal input (RDT / TC / 4–20 mA / 0–10 V, le plus courant, matches -1 in your model)

2: RTD dedicated version

3: Thermocouple dedicated version

4: Actuel / voltage dedicated version

Output Code (votre modèle -10)

01: Sortie relais

02: Thyristor logic output

10: Isolated 4–20 mA analogue control output (for SP7 / EP500 valve positioner, mainstream for steam control valves)

11: 4–20 mA + alarm relay

12: Dual 4–20 mA

20: Double relais

30: Relais + thyristor mixed

Firmware 4-digit code (e.g.1810)

Internal factory firmware package: distinguish general PID, steam heat exchange, desuperheating, EasiHeat matched, sterilizer dedicated program. Cross-version firmware flashing is prohibited; FC pre-configured units are bound to firmware package.

Code de suffixe

FC: Factory Configured (preloaded parameters, PID, gamme, verrouillage, PI)

FS: Factory Set (simple calibration, no complex logic)

ATEX: Explosion-proof version

HW: High humidity reinforced version (steam room)

FS-H: Food hygienic firmware

1. GSX Spare Parts & Accessoires
2. GS-X-USB-CABLE: iTools configuration cable (USB to Ethernet / service port)
3. GS-X-BACKUP: Parameter backup package (free iTools software from Spirax Sarco website)
4. GS-X-PANEL-GASKET: Panel sealing gasket (poussière & water proof, recommended for steam room)
5. GS-X-TERMINAL-KIT: Replacement terminal block kit
6. Platform Comparison (to avoid confusion with old models)

GS-X: Nouvelle génération, native Ethernet IIoT, 0.1% précision, configured via iTools

SPC300 / SPC310: Previous generation single-loop controller (obsolete, replaced by GS-X)

SX80 / SX90: Low-cost basic temperature indicator, not GS-X series

1. Remarques importantes
2. The manufacturer does not publish a complete list of all combinations. Many combinations are project-specific order codes only retrievable from Spirax Sarco internal selection system.
3. GS-X1/X2/X3 share the same software core and iTools compatibility, differing in terminal layout and I/O capacity.
4. Do NOT reset FC factory-configured units to factory default, custom steam logic will be lost and only the manufacturer can reissue configuration.
5. Protocoles pris en charge: Modbus RTU (RS485), Modbus-TCP (Ethernet), compatible with SCADA, BMS and iTools.