Home > Products > SIEMENS > SIMATIC S7 Series
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Complete model
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6GK7243-1BX30-0XE0
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Product family
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SIMATIC NET CP 1243-1
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Product type
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Communications processor for SIMATIC S7-1200
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Primary application
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Additional Ethernet interface and control-center connection by telecontrol protocols
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Ethernet interface
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1 Industrial Ethernet interface with 1 RJ45 port
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Transfer rate
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10 to 100 Mbit/s
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Supply voltage
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5 V DC from the S7-1200 backplane bus
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Current consumption
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0.25 A typical from 5 V DC backplane bus
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Power loss
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1.25 W
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Maximum units per CPU
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3
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Telecontrol protocols
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DNP3 and IEC 60870-5; TeleControl Basic control-center connection
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Event buffer
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Up to 64,000 events when the connection is interrupted
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Telecontrol data points
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Up to 500 data points per device
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Cloud protocol
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MQTT supported; 1 active cloud connection; up to 500 data points per device
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Security
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Stateful firewall; IPsec and SINEMA Remote Connect VPN
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VPN capacity
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Up to 8 connections
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VPN encryption
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AES-256, AES-192, AES-128, and 3DES-168
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VPN authentication
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Preshared key and X.509v3 certificates
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Time synchronization
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NTP and secure NTP; synchronization from NTP server or control center
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Diagnostics
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Web-based diagnostics and online diagnostics with SIMATIC STEP 7
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Protection rating
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IP20
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Operating temperature
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-20 to 60 deg C vertical; -20 to 70 deg C with horizontally arranged busbars
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Storage temperature
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-40 to 70 deg C
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Relative humidity
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Up to 95% at 25 deg C, non-condensing
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Mounting
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35 mm DIN rail or wall mounting
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Dimensions
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30 x 110 x 75 mm (W x H x D)
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Weight
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0.122 kg net
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Engineering
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STEP 7 Basic or Professional
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Approvals
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CE, UKCA, cULus, RCM, RoHS, EAC, ATEX, IECEx, CCC, FM, DNV, and LRS
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Telecontrol protocols
The processor supports DNP3 and IEC 60870-5 for connection to control centers.
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Control-center systems
Permanent connections are supported for TeleControl Server Basic, WinCC, and PCS 7 applications.
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Event buffering
If the control-center connection is interrupted, the module can buffer up to 64,000 events.
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Station role
The CP is specified as a substation with up to 500 data points per device.
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Industrial Ethernet
One RJ45 Industrial Ethernet port operates at 10 to 100 Mbit/s.
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S7 and open communication
The supported connection counts follow the capacity of the connected S7-1200 CPU.
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Cloud connectivity
MQTT, trigger management, and time stamping are supported for one active cloud connection.
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Remote engineering
Online diagnostics, program download, and remote firmware update are available through SIMATIC STEP 7.
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Stateful firewall
The integrated firewall uses stateful inspection for industrial communication protection.
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VPN functions
IPsec and SINEMA Remote Connect are supported with up to eight VPN connections.
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Cryptography
VPN encryption includes AES-256, AES-192, AES-128, and 3DES-168 with PSK or X.509v3 authentication.
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Time and services
NTP and secure NTP are supported, and non-required services can be switched off.
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Compact format
The single-width S7-1200 module measures 30 x 110 x 75 mm and has a net weight of 0.122 kg.
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Mounting options
The CP supports both 35 mm DIN-rail mounting and wall mounting.
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Environmental range
Operate from -20 to 60 deg C vertically or -20 to 70 deg C with horizontally arranged busbars; IP20.
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Engineering requirement
Configure with STEP 7 Basic or Professional and verify the permitted maximum of three CP units per CPU.
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Q1. How can I verify that the quoted item is exactly 6GK7243-1BX30-0XE0?
Match the complete order number on the quotation, CP label, packaging, and invoice. Confirm CP 1243-1, the single RJ45 port, 30 mm module width, DNP3 and IEC 60870-5 support, firewall, and VPN functions.
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Q2. How can I distinguish a new CP 1243-1 from a used or refurbished unit?
Request current photos of the Siemens label, RJ45 port, backplane connector, DIN-rail latches, housing, indicators, and packaging. Inspect for connector wear, rail marks, scratches, replaced labels, or resealing.
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Q3. How should a buyer verify that the supplier is legitimate and reliable?
Confirm the supplier legal name, registration, physical address, bank beneficiary, business contacts, and SIMATIC NET transaction references. All commercial documents should consistently identify 6GK7243-1BX30-0XE0.
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Q4. Which specifications should an engineer verify before purchasing?
Verify S7-1200 compatibility, one 10 to 100 Mbit/s RJ45 interface, required telecontrol protocol, VPN and firewall requirements, maximum three CPs per CPU, 30 x 110 x 75 mm dimensions, and 0.122 kg weight.
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Q5. What physical evidence should be requested before payment?
Request timestamped photos or video showing the complete order-number label, RJ45 port, backplane contacts, indicators, mounting latches, enclosure condition, and sealed Siemens packaging.
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Q6. Can another CP 1243 suffix replace 6GK7243-1BX30-0XE0?
Not automatically. Similar communications processors can change interface type, telecontrol protocols, cloud functions, VPN capacity, firmware, environmental range, engineering requirements, or S7-1200 compatibility. Engineering must validate the complete network design.
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