Unitronics (Quincy, MA) has introduced Samba, a palm-sized PLC with HMI and onboard I/Os for machine control that features a color 7" HMI panel. The 16-bit touchscreen enables data entry and display of variable data, including color trend graphs and alarm screens. Samba supports 24 userdesigned screens and 5-MB images per application. The integrated PLC offers features including two auto-tuned PID loops, time-based RTC control, data logging, and recipes. The internal memory holds 112 KB of application logic, plus 512K for fonts and 5 MB for images. Onboard I/Os offer digital, analog, and high-speed functionality.
Samba also features a flat fascia and IP66/IP65/NEMA4X rating. All units come supplied with a programming port (USB for 4.3" and 7"; RS-232 for 3.5"), and additional ports can be added such as RS-485 or Ethernet, and CANbus port. Samba supports GPRS/GSM, email, and SMS, as well as industrial TCP/IP protocols, MODBUS, DF1 slave, CANopen, and J1939.
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