Siemens 6GK7242-7KX31-0XE0 Industrial Control Module

The Siemens CP 1242-7 V2 Communications Processor (6GK7242-7KX31-0XE0) is a dedicated telecontrol interface for SIMATIC S7-1200 that provides GSM/GPRS remote connectivity to SCADA and telemetry networks. It is powered from 24 V DC via a 3‑pole terminal block, mounts on a 35 mm top-hat DIN rail, and measures about 100 mm in length. The module has no Industrial Ethernet interfaces and exposes 1 SIM card slot and an external antenna connection (SMA socket, 50 ohms) for cellular access, with a single external antenna and power-supply connections. It supports GSM/GPRS data with up to 86 kbit/s downlink and 43 kbit/s uplink, enabling remote telemetry and telecontrol applications even in sites without wired Ethernet. The CP 1242-7 V2 supports telecontrol protocols such as DNP3 and IEC 60870-5, and it can buffer up to 64,000 events if the connection is interrupted, improving data integrity for intermittent networks. For manageability, it offers online diagnostics with SIMATIC STEP 7, program download with STEP 7, and remote firmware updates. Typical uses include remote telemetry and telecontrol of industrial processes via GSM/GPRS when no Ethernet link is available.