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Siemens SIMATIC S7-200 CN 6ES7231-0HC22-0XA8 EM231 4-Channel Analog Input Module

Siemens SIMATIC S7-200 CN 6ES7231-0HC22-0XA8 EM231 4-Channel Analog Input Module

Siemens SIMATIC S7-200 CN EM231 Analog Input

Complete Model

6ES7231-0HC22-0XA8

Official Product Description

SIMATIC S7-200 CN EM231 analog input expansion module with four differential 12-bit voltage or current inputs.

CORE FEATURE: Four differential analog input channels with 12-bit conversion and selectable voltage or current ranges.

LEAD TIME: In stock

WARRANTY: 1 year

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WhatsApp +86 18159889985

Appurtenance:

siemens simatic s7 200 cn 6es7231 0hc22 0xa8 em231 analog input-1

Overview
Technical Data
Inquiry
Applications & Features
Interfaces
Installation
Environment
FAQ
Recommend Models
Recommended Products

Product Overview

6ES7231-0HC22-0XA8 is a Siemens SIMATIC S7-200 CN EM231 analog input expansion module with four differential inputs.

The module provides 12-bit analog-to-digital conversion and selectable voltage or current ranges including 0 to 10 V, 0 to 5 V, plus or minus 5 V, plus or minus 2.5 V and 0 to 20 mA.

Siemens identifies the exact article number in the S7-200 CN product and conformity documentation as EM231 CN, AI 4 x 12 bits.

Technical Data

Complete model	6ES7231-0HC22-0XA8
Brand	Siemens
Product family	SIMATIC S7-200 CN
Product type	EM231 analog input expansion module
Analog inputs	4 differential inputs
Resolution	12-bit A/D conversion
Voltage ranges	0 to 10 V; 0 to 5 V; plus or minus 5 V; plus or minus 2.5 V
Current range	0 to 20 mA
Conversion time	Less than 250 microseconds
Step response	1.5 ms to 95 percent
Common-mode rejection	40 dB from DC to 60 Hz
Input impedance	At least 2 megohms for voltage input; 250 ohms for current input
Input filter	-3 dB at 3.1 kHz
Maximum input	30 V DC or 32 mA
Common-mode condition	Signal plus common-mode voltage not more than 12 V
Supply voltage	24 V DC; permissible range 20.4 to 28.8 V DC
Power dissipation	2 W
Current requirement	20 mA from 5 V DC; 60 mA from 24 V DC
Dimensions	71.2 x 80 x 62 mm, width x height x depth
Weight	183 g
Official sources	Siemens S7-200 CN analog expansion documentation; S7-200 System Manual Appendix H; Siemens CE Declaration page 3 for exact 6ES7231-0HC22-0XA8

Inquiry

CONTACT

STELLA

Email Inquiry [email protected]

WhatsApp +86 18159889985

Applications & Features

Four differential inputs

Four differential channels support analog process signals while reducing common-mode interference within the specified limits.

Selectable signal ranges

The exact EM231 CN record supports unipolar and bipolar voltage ranges plus 0 to 20 mA current input.

12-bit conversion

The module converts each analog input with 12-bit resolution for S7-200 CN expansion applications.

Fast acquisition

Siemens specifies conversion in less than 250 microseconds and a 1.5 ms response to 95 percent.

Interfaces

Input topology	Four differential analog input channels.
Voltage signals	0 to 10 V, 0 to 5 V, plus or minus 5 V, and plus or minus 2.5 V.
Current signals	0 to 20 mA with the Siemens-specified wiring arrangement.
Expansion bus	Connects as a compatible S7-200 CN expansion module.
Addressing	Analog input words are assigned according to the CPU and preceding analog-module configuration.

Installation

01 - Verify the exact suffix

Match 6ES7231-0HC22-0XA8 on the quotation, Siemens label, packaging and exact CN conformity record.

02 - Confirm CPU compatibility

Verify the S7-200 CN CPU type, expansion capacity, power budget and analog input address allocation.

03 - Select the signal range

Set the module switches and wiring for the required voltage or 0 to 20 mA range exactly as specified by Siemens.

04 - Wire differential inputs

Observe polarity, shielding, common-mode limit, 30 V DC or 32 mA maximum input and grounding instructions.

05 - Scale and test

Read the assigned AIW values, apply the correct engineering scaling and verify each channel with a calibrated source before commissioning.

Environment

System installation

Use only within a compatible SIMATIC S7-200 CN station and follow the S7-200 system grounding and wiring instructions.

Input protection

Do not exceed 30 V DC or 32 mA at an analog input.

Common-mode limit

Keep signal voltage plus common-mode voltage at or below 12 V.

Noise control

Use suitable shielding, cable routing and grounding for low-level analog signals.

Official CN cross-reference

Siemens Appendix H maps 6ES7231-0HC22-0XA8 to 6ES7231-0HC22-0XA0 for the wiring and performance specifications in Appendix A.

FAQ

Q1. How can the exact quoted 6ES7231-0HC22-0XA8 be verified?

Match the full 6ES7231-0HC22-0XA8 on the quotation, Siemens label and package. Confirm S7-200 CN EM231 with four differential 12-bit analog inputs.

Q2. How can New, Used or Refurbished condition be distinguished?

Request date-marked photos of the label, terminal cover, expansion-bus connector, range switches, housing and packaging. Check for terminal marks, scratched contacts, replacement labels and repaired plastic.

Q3. How should supplier legality and reliability be checked?

Verify the legal entity, registered address, beneficiary account and traceable contact. The offer must state Siemens, 6ES7231-0HC22-0XA8, EM231 CN, condition and quantity.

Q4. Which specifications must engineering confirm before purchase?

Confirm four differential inputs, 12-bit conversion, the required voltage or 0 to 20 mA range, common-mode limit, S7-200 CN CPU expansion capacity and analog word addressing.

Q5. What physical evidence should be requested before payment?

Ask for date-marked photos showing the complete model label, range switches, terminal cover, expansion connector, seals and package label. The -0XA8 suffix must be clearly readable.

Q6. Can another EM231 or a non-CN suffix replace 6ES7231-0HC22-0XA8?

Not automatically. Regional suffix, input count, signal ranges, approvals and system compatibility can differ. Compare the exact Siemens record and CPU configuration before accepting any substitute.

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