Littelfuse SIO-RTD User Manual

Protection Relays, Monitors & Systems

Temperature Monitoring

SIO-RTD SERIES

Temperature Input Monitor

Simplified Circuit Diagram

Description

The SIO-RTD is a microprocessor-based data-acquisition
system for measuring temperatures accurately with resistance
temperature detectors (RTDs) and for monitoring 4-20 mA
analog-output devices in industrial environments. RTD inputs
are noise-filtered and automatically calibrated for lead-length
compensation, ambient temperature, and other factors
providing accurate readings through the specified temperature
range for several types of RTD devices.

Features & Benefits

FEATURES BENEFITS

8 Inputs

CSA Class 1 Zone 2
Hazardous-location
Certified

Individually-selectable
Input Type

Conformal Coating

Remote Monitoring

Single module can collect multiple data points

Can be mounted in hazardous areas

Flexible ; can be used with Pt100, Ni100, Ni120, Cu10
RTD or 4 -20 mA inputs

Protects circuit boards against corrosion and moisture

Up to 1.2 km away from network master

SUPPLEMENTAL MONITORING

M

RTD x 8

SIO-RTD

(Temperature Input Monitor)

RS-485 Modbus RTU

Ordering Information

CATALOG/ SYSTEM NUMBER CONTROL POWER, OUTPUT

SIO-RTD-02-00 24 Vdc, Modbus RTU

Notch Filter

Rejects noise from motor monitoring applications

For detailed wiring diagram, see page 86.

Specifications

Input Voltage 18 to 32 Vdc, 2W
Dimensions H 87 mm (3.43”); W 112.5 mm (4.43”) ;

D 56 mm (2.2”)
RT D Type s Pt100 (default), Ni100, Ni120, Cu10
RTD Range -40 to 200˚ C with open and short detection
Analog Range 4-20 mA
Accuracy
(Pt100, Ni100, Ni120) 1˚ C
(Cu10) 3˚ C
(4-20 mA) 0.1 m A
Lead Compensation Up to 20 Ω
Communications Modbus RTU
Conformally Coated Standard feature
Warranty 5 years
Mounting DIN, Surface

®

©2011 Littelfuse Startco Product Catalogue

37

www.startco.ca/products/sio-rtd