Product Overview

SIMATIC S7-1200 Communications Processor CP 1243-1 (6GK7243-1BX30-0XE0)
A communications processor that serves as an additional Ethernet interface for the S7-1200 PLC series. It enables secure connection to control centers via telecontrol protocols—DNP3, IEC 60870-5, TeleControl Basic—and incorporates robust security features including a firewall and VPN (IPsec, AES-256/192/128, 3DES).
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Technical Specifications

Network Interface

1 × RJ45 Industrial Ethernet port (10–100 Mbit/s)
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Power and Consumption

Powered via the backplane bus: 5 V DC

Typical current: ~0.25 A

Power loss: ~1.25 W
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Environmental Conditions

Operating temperature:

Vertical rail: –20 °C to +60 °C

Horizontal busbar: –20 °C to +70 °C

Storage/Transport: –40 °C to +70 °C

Max relative humidity: 95% (non-condensing)
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Physical Characteristics

Compact S7-1200 single-width module

Dimensions: W 30 mm × H 110 mm × D 75 mm

Net weight: ~0.122 kg
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Mounting: 35 mm DIN rail, wall mounting supported
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Communication Capabilities

Cloud connectivity: supports MQTT, trigger management, timestamping

Buffered messaging: stores up to 64,000 events with 500 data points per device
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Teleservice: online diagnostics via STEP 7, program downloads and remote firmware updates supported
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Time synchronization via NTP (including secure mode), from NTP server or control center
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Security Features

Stateful firewall

VPN using IPsec with AES-128/192/256, 3DES encryption

Authentication via PSK or X.509v3 certificates

Secure hashing: MD5, SHA-1, SHA-2

Up to 8 VPN connections supported

Features include encrypted data transmission and deactivation of unused services
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Certifications & Environmental Impact

Hazardous location approvals: FM, CCC-Ex; also suitable for maritime use
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Environmental Product Declaration provided: CO₂-equivalent ~89.6 kg (manufacturing: ~14.3 kg; operation: ~75.1 kg)
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Product Lifecycle & Ordering Info

Lifecycle Status: Active Product (PLM Code: PM300)
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Lead Time: Typically ships in ~1 working day
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Net Weight: ~0.179 kg
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Packaging Size: 40 × 120 × 125 mm
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Country of Origin: Germany
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Compliance:

RoHS compliant since October 6, 2014

WEEE Take-Back applicable

Contains REACH-listed substances (Lead, Lead monoxide, Bisphenol A, others)—no expected risk in proper use
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Engineering Insight

Enhanced Communication Flexibility
Empowers S7-1200 systems with secure, high-level connectivity to SCADA and control centers using standard telecontrol protocols and VPN encryption.

Designed for Industrial Reliability
Rugged enough for industrial conditions with wide temperature tolerance, DIN rail snap-on mounting, and low power consumption.

Full Diagnostics & Teleservice Support
Enables remote system management including diagnostics, firmware updates, and program distribution via STEP 7.

Future-Proof Security
Featuring advanced firewalling, encrypted communication, time verification, VPN capability, and structured cybersecurity design.