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SECTION 1 - INSTALLATION
NOISE SUPPRESSION

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 955-257 1.4  MOUNTING HAZARD: INSURE    THAT    ALL    POWER    AND    MEASURING    CIRCUITS    ARE    DISCONNECTED    BEFORE INSTALLATION IS ATTEMPTED. In the normal course of installation and operation, there is no reason to remove the electronic assembly  from the  case. If the      electronic   assembly   is   removed,   SPECIAL   PRECAUTIONS   MUST   BE   TAKEN   IN   HANDLING   THE   CMOS INTEGRATED CIRCUITS TO PREVENT STATIC DISCHARGES FROM CAUSING DEVICE FAILURE. The entire electronic assembly can be removed from the case for servicing without disturbing the rear terminal wiring by pressing  in  the  tabs  on   each   side   of   the   bezel   and   carefully   pulling   the   assembly   out   of   the   case.      When   digital communications is included, a ribbon cable connector must be pulled from the middle board before the assembly can  be removed. When  reinstalling the electronics  assembly, make  sure that the unit is inserted right side up and that all boards are firmly in their connectors. The controller is designed for mounting  in  a  control  cabinet  or  rack  where  access  to  the  rear  terminals  is  enclosed  and where supply and load wiring can be properly terminated and  enclosed. Prepare a standard 1/4 DIN panel cutout of 3.620 inches by 3.620 inches (92 X 92 mm) and insert  the  instrument  into  the  panel  cutout. The U-shaped mounting bracket, supplied with each unit, is installed from the rear of the controller and held in place by two threaded studs mounted on the rear case. Tighten the bracket with the hardware supplied to insure a snug fit. Overtightening may cause the rear of the case to bow.  To prevent this, a washer of the panel thickness may be used over the stud between the case and the bracket. The controller has been designed for panel mounting with natural convection cooling. When installing the unit, be sure that the case label and the rear vents are on the top side.  Allow adequate clearance for proper air circulation. PANEL CUTOUT 3.620 X 3.620 +.000/-.039 (92 X 92 mm) NOTE: For panel mounting of two or more units, use a  minimum horizontal  spacing of 4.5 inches on center. ECLIPSE INSTRUMENTATION DIVISION page 3 - 1082







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