Product Introduction

Spirax Sarco SX80 process controller is a 1/16 DIN panel-mounted controller designed for single and multiple setpoint control applications. It can be used in conjunction with Spirax Sarco pneumatic / electric control valves and associated electronic and electrical equipment. Each controller provides both VMD (3-point valve motor drive) and analogue (4–20 mA) outputs, and incorporates convenient quick start codes to make on-site commissioning simple and efficient.

Key Features

1. Universal inputs and outputs: Supports a wide range of input types including RTD, thermocouple, mA and mV. Outputs include VMD (valve motor drive), continuous mA, voltage, relay and logic signals to meet diverse control requirements.
2. Integral auxiliary supply: Built-in 18 V DC auxiliary power supply can be used to power external transmitters requiring this voltage, simplifying system wiring.
3. Scrolling text messages: Configurable scrolling text allows the controller to display process status information, helping operators to monitor plant conditions in real time.
4. Quick commissioning: Five-digit quick start codes streamline setup and commissioning, reducing the complexity of configuration on site.
5. High EMC and safety compliance: Conforms to multiple international standards, including 93/68/EEC and EN 61010-1, with excellent electromagnetic compatibility performance for industrial environments.

Technical Data

General

Item	Value
Mounting format	1/16 DIN panel mounting
Power supply	85–265 Vac, max. 6 W, screw terminals
Ambient temperature	0–55°C
Ambient humidity	5–85% RH
Environmental limits	Not suitable for use in explosive or corrosive atmospheres
EMC (emissions)	EN 61326-1:1997 Class B (including amendments A1, A2, A3)
EMC (immunity)	EN 61326-1:1997 (industrial locations, including A1, A2, A3)
Electrical safety	BS EN 61010
Weight	250 g
Approval mark	CE

Process variable input

Item	Value
Accuracy (at 25°C ambient)	< ±1°C, reading < 0.1%
Input impedance	100 MΩ
Calibration	Two-point gain and offset
Isolation	300 Vac double insulation
Engineering units range	1–9999; supports 0.01–300, 0.1–3000 and -9999
Tuning modes	One-shot tuning or natural frequency tuning; controller automatically selects optimum mode
Hysteresis range	0.01–300.0 or 0.1–3000 engineering units
Control behaviour	Designed to minimise overshoot in critical processes

Transmitter power supply

Item	Value
Output voltage	18 V ±15%
Load regulation	< 1 V at 25 mA
Maximum current	30 mA

Control action

Item	Value
Proportional band	1–9999 engineering units (0.01–300 or 0.1–3000 ranges)
Integral time	Off–9999
Derivative time	Off–9999
Error band / tuning	One-shot or natural frequency tuning, automatically selected
Auto / manual	Selected from the keypad

Relay output

Item	Value
Isolation	300 Vac double insulation
Maximum load	2 A at 264 Vac (resistive)

Isolated DC output

Item	Value
Isolation	300 Vac double insulation
Output ranges	0–20 mA, 4–20 mA
Resolution	13.5 bits

Weight

Item	Value
Product weight	250 g
Note	Weight is for the controller only, excluding packaging and accessories

Dimensions

Materials

Component	Material information	Notes
Enclosure	Not specifically stated	Meets typical industrial protection requirements
Terminal blocks	Not specifically stated	Screw terminal design for secure wiring
Internal circuitry	Not specifically stated	Designed to meet EN 61010 electrical safety requirements
Front panel	Not specifically stated	Compact design to suit 1/16 DIN mounting

Wiring Information

Wiring notes

1. Installation, commissioning, operation and maintenance must be carried out only by suitably qualified personnel.
2. All wiring and settings must strictly follow the product parameters and safety information given in the installation and commissioning manual to avoid damage or malfunction.
3. Power input is 100–230 Vac ±15%, 48–62 Hz. Connect L (live) and N (neutral) correctly to the designated terminals.

Key wiring schemes

1. Sensor input wiring: Supports thermocouples, Pt100 RTDs and other sensors via the VI terminal, using a 2.49 Ω resistor where required.
2. 4–20 mA transmitter wiring: Use the internal 18 V ±15% transmitter supply via the V+ and V- terminals to power the transmitter. The signal should be wired with screened cable to the appropriate input terminals to ensure stable transmission.
3. Relay output wiring: The IO1 relay output provides a normally open contact via the 1A and 1B terminals for driving external actuators, with a maximum load of 2 A at 264 Vac (resistive).
4. Isolated DC output wiring: The isolated analogue output provides 0–20 mA or 4–20 mA to drive related control equipment, with a resolution of 13.5 bits.