Spirax Sarco - Catalogo Agosto 2017

Control valves

Positioners and controllers

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

TI-P323-30

CH Issue 3

SX90

Process Controller

Description

The SX90 is a panel mounted 1/8th DIN controller, suitable for constant set point control of systems having fixed pre-programmed

set points. The controller has universal inputs, and outputs using PID for close control of industrial processes. The SX90 controller is

for use with the Spirax Sarco range of pneumatic and electric control valves and electrical and electropneumatic instruments.

SX90 features:

- Universal input

- Resistance thermometers, thermocouples, mA and mV.

- Universal output

- VMD (valve motor drive), mA and voltage for continuous (split

range function), relay and logic for switching control.

- Auxiliary power supply

- For external transmitter requiring 24 Vdc.

- Set point

- The SX90 can operate with local set point, remote set point, or a choice

of 4 set points can be selected.

- Ramps

- There are 2 independent ramps (ramp up and ramp down) for rate of change

from one set point to another.

- Remote set point

- For cascade control (master / slave) using 2 controllers working

together, or to remotely control the set point.

- Retransmission

- For retransmission of the process value, set value, or as second

analogue output.

- Event alarm

- 4 programmable relay outputs for deviation, band, and process alarms.

- Quick codes

- 5-digit quick codes enable easy set-up and commissioning of the

controllers

- Serial communications

- For connecting via a serial port RS 485 (5 wire), up to

64 controllers into a supervisory system.

- Auto/man

- The automatic to manual mode can be changed via the key board, or

logic inputs.

- Logic inputs

- 3 logic inputs to provide a variety of selectable functions.

- Potentiometer Input

- For feedback of valve position.

- Text messages

- Scrolling text messages can be configured to alert the user to

process conditions.

- Forced output

- Forced output level defined by instrument parameter and activated

by a logic input or by writing to the parameter.

- Split range function

- Can work with 2 valves (split range). Please note that

this function is only available if the SX90 is running the 1.05 software or newer

(the software version on your unit will be displayed during start-up).

Approvals

These controllers conform to the Council Directive 93/68/EEC and the regulations on the essential protection requirements in

Electrical Apparatus EN 61010-1.90.

- EMC emissions specification:

EN 61326-1: 1997 Class B (including amendments A1, A2 and A3).

- EMC immunity specification:

EN 61326-1: 1997 Industriallocations (including amendments A1, A2 and A3).

See pages 2 and 3 for the SX90 process controller technical data

Dimensions

(approximate) in mm

96mm

48 mm

101 mm

90 mm

Panel cut-out

45 mm

-0.0

+0.8