Part Number 777459-34 designates the National Instruments SCC-RLY01 Relay Module, a component specifically engineered for high-performance data acquisition systems integrated with NI DAQ devices. This module features a single-pole double-throw (SPDT), non-latching relay, which is controlled via digital input/output lines 0 to 7 on any E/M Series DAQ device. When paired with the SC-2345, it is capable of switching loads of up to 5A at 30 VAC or 5A at 30 VDC; when connected to the SCC-68, it can manage loads of 5A at 250 VAC or 5A at 30 VDC. The SCC-RLY01 draws a maximum of 300 mW (60 mA at +5V) and boasts a signal bandwidth ranging from DC to 400 Hz. The relay operates with an impressive switching performance, characterized by an operate time of 5 ms (10 ms max) for the transition from normally closed (NC) to normally open (NO), and a release time of 4 ms (5 ms max) for the reverse operation. With a maximum switching speed of 30 cycles per second (cps) at rated load and a contact lifetime of 50 million operations at 180 counts per minute (cpm), this module is optimized for reliability in demanding environments.

Physically, the module measures 7.93 cm x 3.55 cm x 1.87 cm and weighs 1.3 oz. It is equipped with a 20-pin right-angle male connector and a 3-pin screw terminal block for I/O connections, accommodating field wiring with a diameter between 28 to 16 AWG. For safety compliance, the maximum working voltage is ±60 VDC (Measurement Category I) between the channel and earth, and ±300 VDC (Measurement Category II) when connected through the SCC-68. The operational temperature range for the SCC-RLY01 is from 0 to 50 °C with a humidity range of 10 to 90% RH and can function at altitudes up to 2000 meters. The module can also be stored in a more extensive temperature range of -20 to 65 °C, making it a robust choice for various applications in industrial automation and control systems.