1OutlineThe outline of the basic module is shown in Figure 1 (With theexample of EC20-3232BRA)Figure 1 Structure of the basic moduleThe name and function of the ponents in the figure are as follows:1.The installation position of a button cell battery (CR2032 lithiumbattery)for data backup.2.Power supply input ports3.Signal input ports4.Input signal status LEDs5.26pin bus bar socket,used for connecting the extension module6.Output signal status LEDs7.Fix screws,used for tightening the top/bottom cover of the PLC8.Mounting holes,used for installing screws10.Signal output ports11.System operation status LEDs12.Communication port COM1,providing RS485 and RS232 at the1same time13.Communication port COMO,RS232,Mini DIN8 socket14.System operation control switch,with three positions:ON,TMand OFF.Note:"EC20-4040BRA and EC20-4040BTA are installed by M4screws.2 Intallation2.1 Installation PositionThe PLC must be applied in the environments meeting with standardll installation ambient,and Class 2 pollution.Mount them up anddown on the backboard of the cabi horizontally.You must providea clearance of at least 15cm,both above and blow the units,forpropel cooling.Never mount them to the floor or ceiling of anenclosure or other directions,as shown in Figure 2.No heatgenerating equipment should exist around the PLC2.2 Installation MethodGenerally you can mount the PLC onto a standard rail (DIN)with35mm width.Follow these steps:1.Fix the DIN rail to the backboard.2.Pull out the clip located on the bottom of the PLC and hook theback of the PLC onto the rail.3.Snap the clip closed,carefully checking to ensure that the clip hasfastened the PLC securely onto the rail.4.At last,install two DIN rail stops at the two sides of the PLC toavoid slippage around.3Other EC20 series modules can be mounted using the sameprocedures.dp cUnder the conditions with great impact,you should mount the PLC ona panel using the screw installation.Using four M3 fix screws throughthe four mounting holes on the enclosure of the PLC (whileEC20-2012BR/BT has only two holes)to fix the PLC on the backpanel of the electric cabi,as shown in the Figure 4.◆4 mounting holesM3 fix screwFigure 4 Installing a PLC onto a panel with fix screw2.3 Installation Dimensions1.The dimensions for the outline and mounting holes ofEC20-2012BR and EC20-2012BT are shown in the Figure 5.(35mm)%2EC20-2012BR and EC20-2012BT2.The dimensions for the outline and mounting holes ofEC20-3232BRA and EC20-3232BTA are shown in the Figure 6.应217-27EC20-3232BRA and EC20-3232BTA3.The dimensions for the outline and mounting holes ofEC20-4040BRA and EC20-4040BTA are shown in the Figure 7.5Figure 7 Dimensions of outline and mounting holes ofEC20-4040BRA and EC20-4040BTA3 SpecificationsA15mA1000mA650mA600Modelprovided'70mA460m4EC20-20128TA600m4650m4410m4EC2032328TA350m40650m4240m4300m4350m4EC20-40408TA120m40280m4320m4