Eaton Crouse-Hinds F892 Instruction Manual

6INM F892 Rev 1The DC power, Alarm and Field Segment connectors are pluggable and available in ascrew terminal version (-xS) or a spring clamp version (-xC). See Figures 5a & 5b. Theterminals can accept the following conductor sizes:Type Conductor sizeScrew terminals (-PS) 0.14 to 2.5mm2Spring clamp terminals (-PC) 0.2 to 2.5mm2Figure 5a - Screw Terminal Figure 5b - Spring TerminalNOTE: When wiring to spring-clamp terminals, use a screwdriver with a 3-4 mm bladeand depress the spring-clamp button before inserting the termination cable. SeeFigure 5b.5 1 DC Power RequirementsDual redundant power terminals requiring a nominal input voltage of 24VDC areprovided allowing the use of bulk power supplies with a supply range of 19.2–30VDC.Input power cabling and over-current protection devices must be chosen to match thecurrent consumption.An F892 system, operating with redundant F801 modules at 24VDC, will require 3.5Ain total if all eight segments draw the maximum of 350mA. With redundant F802modules the system will draw 6A when all segments are loaded to 500mA. Note thatthe total current could be drawn from either the Power A or Power B connection if onepower module is removed.It is also important to size the Bulk Power Supply to handle the inrush current requiredby the F801 or F802. Inrush is less than 2 times the maximum rated current for theF801 with a duration lasting less than 1ms. For the F802, the inrush is less than 4times the maximum rated current with a duration less than 10ms.