Quad Pak modules contain the equivalent of four single channel I/O circuits in a single high-density package. Each Quad Pak module is divided into two pairs of channels with each pair sharing a common connection. The Quad Pak modules are designed to plug into the Quad Pak high-density I/O mounting racks only and cannot be plugged into single channel racks. Quad Pak modules are designed to work with a 5 VDC logic voltage only and can be used with Optomux, Pamux, and Mistic protocol brain boards and mounting racks as well as racks using a direct cable connection to a computer. DC output modules are used for controlling or switching DC loads. Each module provides up to 4,000 Vrms of optical isolation between the field devices and the control logic. Typical uses and applications for DC output modules include switching the following loads: DC Relays, DC Solenoids, DC Motor Starters, DC Lamps or Indicators All Quad Pak DC outputs are current sourcing outputs. The module connection to the load is the positive connection.
IEC 950: 1991-09, 89/336/EEC, Canadian Standards Association, Underwriters Laboratory