The PCI-1737U-BE is a 24-channel TTL digital I/O card manufactured by Advantech. It is designed for PC-based industrial automation applications, and features 24 channels of isolated, high voltage/current outputs and 8 channels of high speed, TTL compatible digital inputs. It is capable of up to 16 programmable I/O modes, and can be programmed with various software libraries, including Visual C++ and C#. The card is compatible with Windows operating systems, and features an onboard watchdog timer for system reliability. It is ideal for applications such as machine control, motion control, process monitoring, bit-banging, and data acquisition.