Siemens 505-2571 User Manual download pdf (Page 31)

2550-A, 2551-A

2551-A 8-Channel Isolated Thermocouple Input

Module

The 2551-A is a high-speed 8-channel isolated

thermocouple input module compatible with the CTI 2500

Series® or Simatic® 505® I/O base. The 2551-A translates

thermocouple input signals into scaled temperature values

and millivolt input signals into equivalent digital words.

Features:

 Fast 2 mSec update time per channel

 Each input configurable for Type J, Type K, or millivolts

 1500V channel-to-channel isolation

 1500V channel-to-backplane isolation

 Digital filtering circuit for increased noise immunity

2550-A 8-Channel Isolated Analog Input Module

The 2550-A is a high-speed 8-channel isolated analog input

module compatible with the CTI 2500 Series® or Simatic®

505® I/O base. The 2550-A translates analog input signals

into an equivalent digital word.

Features:

 Fast 4 mSec update time for all 8 channels

 External isolators not required

 1500V channel-to-channel isolation

 1500V channel-to-backplane isolation

 No external power supply required for module

 No external current resistor required

 On-board calculations for 4-20 mA offset inputs

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Siemens 505-2571 User Manual Page 31