Siemens ST PCS 7 User Manual

Process I/O

ET 200M distributed I/O

AI - analog input modules

11/19

Siemens ST PCS 7 · November 2007

■

Overview

The analog input modules described here break down into
• multi-function modules for current, voltage and temperature

measurements, and

• special, highly accurate modules for current and voltage mea-

surements or temperature measurements.

All modules automatically supply channel-specific and module-

internal diagnostics data, except module 6ES7 331-1KF01-

0AB0. With the latter module, channel failure is identified by the

PCS 7 analog driver block.
The individual channels of the analog input modules can be pa-

rameterized in groups independently of each other.

■

Selection and Ordering Data

Order No.

SM 331 modules for current, voltage and temperature measure-
ments

8 inputs, individually parame-
terizable
• Resolution 12 bit + sign
• Current measurement 0/4 to

20 mA (8 channels; 2 wires with

external supply or 4 wires)

• Voltage measurement

(8 channels)

• Resistance thermometer Pt100,

Ni100, Ni1000, LG-Ni1000

(8 channels; 2, 3 or 4 wires)

• Front connector required:

40-contact

6ES7 331-1KF01-0AB0

8 inputs in 4 channel groups
Redundant design possible
(module redundancy)
• Changeover of measurement

type by range module per chan-

nel group

• Resolution 14 bit + sign
• Current measurement 0/4 to

20 mA (8 channels; 2 or 4 wires)

• Voltage measurement

(8 channels)

• Resistance thermometer Pt100,

Ni100 (4 channels, 2 or 4 wires)

• Thermocouples type E, N, J, K, L

(8 channels),

internal compensation or exter-

nal compensation with compen-

sating box or 0 °C cold junction

• Wire break monitoring
• Diagnostics inside module
• Front connector required:

20-contact

6ES7 331-7KF02-0AB0

2 inputs in 1 channel group
• Changeover of measurement

type by range module

• Resolution 14 bit + sign
• Current measurement 0/4 to

20 mA (2 channels; 2 or 4 wires)

• Voltage measurement

(2 channels)

• Resistance thermometer Pt100,

Ni100 (1 channel, 2 or 4 wires)

• Thermocouples type E, N, J, K, L

(2 channels),

internal compensation or exter-

nal compensation with compen-

sating box or 0 °C cold junction

• Wire break monitoring
• Diagnostics inside module
• Front connector required:

20-contact

6ES7 331-7KB02-0AB0

B) Subject to export regulations: AL: N, ECCN: EAR99H