Siemens 6GK7242-7KX30-0XE0 Communication Module

Siemens 6GK7242-7KX30-0XE0 CP 1242-7 is a GSM/GPRS communications processor for the SIMATIC S7-1200 family that enables the S7-1200 controller to connect to cellular networks for remote data exchange. This compact CP 1242-7 module mounts in the S7-1200 rack and measures 30 mm wide, 100 mm high, and 75 mm deep, with a net weight of about 0.133 kg. It provides a front-cover SIM card slot, a female SMA antenna connector, and a 3‑pin terminal block for a 24 V DC supply. Electricals specify a 24 V DC external supply with +/−20% tolerance; typical current 0.1 A and maximum 0.22 A, and active power dissipation around 2.4 W. The unit operates in environments from −40 to +70 °C (and stores similarly), supports up to 95% relative humidity non‑condensing, and has an IP20 enclosure rating. It offers GSM/GPRS connectivity across 850/900/1800/1900 MHz, with data rates up to 43 kbit/s uplink and 86 kbit/s downlink in GPRS mode, and Multi-slot Class 10 support. Up to three CP 1242-7 modules can be installed per CPU, making it suitable for expanding cellular access within existing SIMATIC S7-1200 systems. In practice, it provides a straightforward way to link S7-1200 controllers to mobile networks for remote monitoring, control, and data transmission over GSM/GPRS.