How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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The Siemens CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) is a communications processor that connects a SIMATIC S7-1200 CPU to LTE, UMTS, and GSM cellular networks in the European frequency range, delivering up to 42 Mbit/s LTE downlink and 5.76 Mbit/s uplink. It adds MQTT cloud connectivity, IEC 60870-5 and DNP3 telecontrol protocols, and an IPsec VPN with AES-256 encryption.
The 42 Mbit/s LTE downlink and 800/1800/2600 MHz band coverage make this variant suited to European cellular networks specifically, while the built-in Telecontrol Server Basic connectivity and IEC 60870-5/DNP3 support let it serve as a remote RTU-style station reporting into a SCADA system over the cellular link instead of a wired connection. Pick it over an Ethernet-only CP 1243 when the S7-1200 sits at a substation or remote site without a fixed Industrial Ethernet drop.
Suited to remote or mobile SIMATIC S7-1200 installations - pumping stations, tank monitoring, or distributed skids - that need cellular connectivity to a SCADA system or cloud platform where a wired Ethernet uplink isn't available.
| product type designation | CP 1243-7 LTE EU Communications processor CP 1243-7 LTE EU for Connection of SIMATIC S7- 1200 to LTE network in European frequency range. |
|---|---|
| product brand name | SIMATIC NET |
| for LTE transmission: with downlink / maximum | 42 Mbit/s |
|---|---|
| for LTE transmission: with uplink / maximum | 5.76 Mbit/s |
| number of interfaces / according to Industrial Ethernet | 0 |
|---|---|
| number of electrical connections: for external antenna(s) | 1 |
| number of electrical connections: for power supply | 1 |
| number of slots: for SIM cards | 1 |
| type of electrical connection: for external antenna(s) | SMA socket (50 ohms) |
| type of electrical connection: for power supply | 3-pole terminal block |
| slot version: for SIM card | Standard |
| Part number | 6GK7243-7KX30-0XE0 |
|---|---|
| Type designation | CP 1243-7 LTE EU Communications processor CP 1243-7 LTE EU for Connection of SIMATIC S7- 1200 to LTE network in European frequency range. |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4047622186169 |
| ETIM class | EC001423 |
| eCl@ss | 27242208 |
| type of mobile wireless service / is supported: SMS | Yes |
|---|---|
| type of mobile wireless service / is supported: GPRS | Yes |
| type of mobile wireless service / is supported: ● | GPRS (Multislot Class 10) |
| type of wireless network / is supported: GSM | Yes |
| type of wireless network / is supported: UMTS | Yes |
| type of wireless network / is supported: LTE | Yes |
| operating frequency / for GSM transmission | 900 MHz, 1800 MHz |
| operating frequency / with UMTS transmission | 900 MHz, 2100 MHz |
| operating frequency / for LTE transmission | 800 MHz, 1800 MHz, 2600 MHz |
| type of voltage / of the supply voltage | DC |
|---|---|
| supply voltage / external | 24 V |
| supply voltage / external / at DC / rated value | 24 V |
| relative positive tolerance / at DC / at 24 V | 20 % |
| relative negative tolerance / at DC / at 24 V | 20 % |
| consumed current: from external supply voltage / at DC / at 24 V / typical | 0.1 A |
| ambient temperature: for vertical installation / during operation | -20 ... +60 °C |
|---|---|
| ambient temperature: for horizontally arranged busbars / during operation | -20 ... +70 °C |
| ambient temperature: during storage | -40 ... +70 °C |
| ambient temperature: during transport | -40 ... +70 °C |
| relative humidity: at 25 °C / without condensation / during operation / maximum | 95 % |
| protection class IP | IP20 |
| module format | Compact module S7-1200 single width |
|---|---|
| width | 30 mm |
| height | 100 mm |
| depth | 75 mm |
| fastening method: 35 mm DIN-rail mounting | Yes |
| fastening method: S7-300 rail mounting | No |
| fastening method: wall mounting | Yes |
| number of units: per CPU / maximum | 3 |
|---|
| protocol / is supported: Message Queuing Telemetry Transport (MQTT) | Yes |
|---|---|
| protocol / is supported: Advanced Message Queuing Protocol (AMQP) | No |
| product function / for cloud connectivity: trigger management | Yes |
| product function / for cloud connectivity: time stamping | Yes |
| product feature / for cloud connectivity / buffered message frame memory | No |
| number of active connections / for cloud connectivity | 1 |
| number of data points per device / maximum | 500 |
| number of users/telephone numbers / definable / maximum | 10 |
|---|
| number of possible connections / for open communication: by means of T blocks / maximum | like CPU |
|---|
| number of possible connections: as email client / maximum | 1 |
|---|
| suitability for use: substation | Yes |
|---|---|
| control center connection | Telecontrol Server Basic |
| by means of a permanent connection | supported |
| by means of demand-oriented connection | supported |
| note | Connection to SCADA system using OPC interface |
| protocol / is supported: DNP3 | Yes |
| protocol / is supported: IEC 60870-5 | Yes |
| product function / data buffering if connection is aborted number of stations / for direct communication / with Telecontrol | Yes; 64,000 events |
| Server Basic: in send direction / maximum | 3 |
| Server Basic: in receive direction / maximum | 15 |
| diagnostics function / online diagnostics with SIMATIC STEP 7 | Yes |
|---|---|
| product function: program download with SIMATIC STEP 7 | Yes |
| product function: remote firmware update | Yes |
| configuration software: required | STEP 7 Basic/Professional |
|---|---|
| product function / is supported / identification link | Yes; acc. to IEC 61406-1:2022 |
| product function / web-based diagnostics | Yes |
|---|
| firewall version | stateful inspection |
|---|---|
| product function / with VPN connection | IPsec, SINEMA RC |
| type of encryption algorithms / with VPN connection | AES-256, AES-192, AES-128, 3DES-168, DES-56 |
| type of authentication procedure / with VPN connection | Preshared key (PSK), X.509v3 certificates |
| type of hashing algorithms / with VPN connection | MD5, SHA-1 |
| number of possible connections / with VPN connection | 1 |
| product function: password protection for teleservice access | Yes |
| product function: encrypted data transmission | Yes |
| protocol / is supported: NTP | Yes |
|---|---|
| time synchronization: from control center | Yes |
| certificate of suitability / CE marking | Yes |
|---|---|
| certificate of suitability / UKCA marking | Yes |
| certificate of suitability / Regulatory Compliance Mark (RCM) | Yes |
| certificate of suitability / RoHS conformity | Yes |
| certificate of suitability / EAC approval | Yes |
| certificate of suitability / ATEX | Yes |
|---|---|
| certificate of suitability / IECEx | Yes |
| certificate of suitability / CCC / for hazardous zone according to GB standard | Yes |
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 180.78 kg |
| global warming potential [CO2 eq]: during manufacturing | 15.34 kg |
| global warming potential [CO2 eq]: during operation | 165.23 kg |
| global warming potential [CO2 eq]: after end of life | 0.21 kg |
| Net weight | 0.204 kg |
|---|---|
| Package dimensions | 120 × 40 × 125 mm |
| Country of origin | DE |
| Shipping weight | 0.704 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe tariff (HS) code on file for CP 1243-7 LTE EU Communications processor CP 1243-7 LTE EU for Connection of SIMATIC S7- 1200 to LTE network in European frequency range. is 85176200.
The EAN (GTIN) of CP 1243-7 LTE EU Communications processor CP 1243-7 LTE EU for Connection of SIMATIC S7- 1200 to LTE network in European frequency range. is 4047622186169.
CP 1243-7 LTE EU Communications processor CP 1243-7 LTE EU for Connection of SIMATIC S7- 1200 to LTE network in European frequency range. ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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