Table 459:IOM with MOV - contact data (reference standard: IEC 60255-23)Function or quantity Trip and Signal relays Fast signal relays (parallelreed relay)Binary outputs IOM: 10 IOM: 2Max system voltage 250 V AC, DC 250 V AC, DCTest voltage across opencontact, 1 min250 V rms 250 V DCCurrent carrying capacityContinuous1 s8 A10 A8 A10 AMaking capacity at inductiveloadwith L/R>10 ms0.2 s1.0 s30 A10 A0.4 A0.4 ABreaking capacity for AC, cosj>0.4250 V/8.0 A 250 V/8.0 ABreaking capacity for DC with L/R < 40 ms48 V/1 A110 V/0.4 A220 V/0.2 A250 V/0.15 A48 V/1 A110 V/0.4 A220 V/0.2 A250 V/0.15 AMaximum capacitive load - 10 nF17.2.13 mA input module (MIM)17.2.13.1 IntroductionThe milli-ampere input module is used to interface transducer signals in the –20 to+20 mA range from for example OLTC position, temperature or pressuretransducers. The module has six independent, galvanically separated channels.17.2.13.2 DesignThe Milliampere Input Module has six independent analog channels with separatedprotection, filtering, reference, A/D-conversion and optical isolation for each inputmaking them galvanically isolated from each other and from the rest of the module.For configuration of the input signals, refer to section "Signal matrix for mAinputs SMMI".The analog inputs measure DC current in the range of +/- 20 mA. The A/Dconverter has a digital filter with selectable filter frequency. All inputs arecalibrated separately The filter parameters and the calibration factors are stored in anon-volatile memory on the module.The calibration circuitry monitors the module temperature and starts an automaticalcalibration procedure if the temperature drift is outside the allowed range. Themodule communicates, like the other I/O-modules on the serial CAN-bus.1MRK 505 208-UEN B Section 17IED hardware647Technical reference manual
