DESCRIPTION

The 2559-RTD is a high-speed 8-channel RTD input module designed for compatibility with the SIMATIC® 505 I/O base.

The Model 2559-RTD converts RTD input signals to Product Bulletin proportional temperature values.

Features

SIMATIC® 505 basic format

1500V channel to PLC backplane isolation

Fast 2 ms update time per channel

Detects open circuits in RTD or field wiring

Compensates for wire resistance

Supports 0 – 100 mV input on any channel

Specification

Input Channels: 8 independently configurable RTD input channels

RTD Type: 100 Ω Platinum: (TCR = 0.003850. Ω/Ω/oC) (European DIN43760 standard)

Temperature range: -198oC to 849.8oC (-327.6oF to 1561.6oF)

120Ω Nickel: (TCR = 0.00672. Ω/Ω/oC)

Temperature Range: -79.8oC to 260.0oC (-111.6oF to 500.0oF)

(Other RTD types on special request) 10Ω Copper

Absolute temperature accuracy: +0.4oC (+0.8oF)

Millivolt Range: 0 to 103.04 millivolts

Millivolt Input Impedance: >10KΩ @ 60Hz >10KΩ @ 60Hz >1000MΩ @ DC

Absolute millivolt accuracy +0.5% full scale or +500µV

Wire Compensation: 20Ω per wire

RTD probe bias current: 250 µA (nominal)

Digital filter time constant: 0.3 seconds

Output Units: Celsius or Fahrenheit (all outputs are jumper selectable)

Repeatability: 0.05% full scale

Resolution: 0.025% full scale

Update Time: 2 milliseconds per channel

Common mode rejection >110db @ 60Hz (digital filtering disabled)

Normal mode rejection >145db @ 60Hz (digital filter enabled)

Input Protection

Input ESD protection: 20.000V

Over-range protection: 20 VDC input to common

Isolated 1500 VDC channel to PLC

Standard shipping configuration:

3-wire 100Ω platinum

Digital filtering enabled