The 1734D-IA16S point block input module by Allen-Bradley is a member of the 1734 point block module series. Unlike most modules in the series, the 1734D-IA16S only has 16 AC inputs with no relay output. It has 120 VoltS AC nominal voltage with an input range between 85 and 132 Volts AC alongside a sinking input. The 1734D-IA16S has 65 Volts AC minimum and 132 Volts AC maximum ON state voltage with an ON state current of 5.0 Amps. It also has an OFF state input voltage that maxes out at 43 Volts AC at 2.5 Amps OFF state current. It has an input filter time delayed at 20 milliseconds through switching from ON to OFF, and a nominal input impedance of 17.0 kVA.

The 1734D-IA16S has an external voltage supply with a voltage rating of 52 to 132 Volts AC which can be attached to the 1734D-IA16S to enhance functionality. It has a maximum point BUS output current of 1 Amps at 5 Volts DC and the point BUS port allows for 12 additional I/O modules, thereby increasing the module capacity by 12. Like every AC module in the series, the 1734D-IA16S has color indicators, which display the module, network, and I/O status with green, yellow, and red lights. It consumes 8.2W of power and dissipates 2.0W of power at 24 Volts DC. At an operating temperature of between -20 and 55 degrees Celsius (-4 and 131 degrees Fahrenheit), the 1734D-IA16S, will sustain a shock rate of up to 15G and a maximum vibration of 5G. It weighs approximately 393.41 grams (13.87 ounces) and it measures 76.2 x 60.0 x 133.4 millimeters (3.00 x 2.36 x 5.25 inches).