MODEL: MDPA-24 Housing material: Flame-resistant resin (black) Lightning Surge Protectors for Electronics Equipment M-RESTER Indicators: Activated by CHK (Check) button, see the status table shown below. LIGHTNING SURGE PROTECTOR BAT: Green LED FOR STANDARD SIGNAL LINE & PULSE USE ALM: Red LED Functions & Features Degradation judged: When the leakage current at the • Designed specifically for 4 – 20mA DC and voltage limiter exceed approx. 7.5 μA. pulse signal line including both 4-wire and 2- wire Life time judged: When the number of discharges of the transmitters discharge element reaches the expected life span. • Life monitor function helps you to decide when you should CHK button: Push button; momentary replace the surge protector; reduces maintenance and Battery: Lithium; No recharge or replacement available. prevents downtime Battery life: 10 years (when used ≤ 2 minutes/month) • Pressing CHK (Check) button confirms the degradation Discharge element status table and life span of the surge protection circuits with LEDs Discharge Voltage BAT ALM Battery Replacement Element Limiter • Absorbs surges only without affecting instrumentation Normal No Need signal Normal Near End Normal Near • No interruption of signal by unplugging surge protector 1 element Normal End of Life Degraded* Immediately RequiredDischarged Unable to Judge : ON : OFF *1. With pulsating line signal or that containing ripples, the LED may flicker or blink when the voltage limiter is degraded. INSTALLATION Operating temperature: -5 to +55°C (23 to 131°F) Operating humidity: 30 to 85 %RH (non-condensing) Mounting: Surface or DIN rail MODEL: MDPA–24[1] Weight: 150 g (0.33 lbs), standard 175 g (0.39 lbs), with DIN rail mounting adapter ORDERING INFORMATION • Code number: MDPA-24[1] PERFORMANCE Specify a code from below for [1]. Max. continuous operating voltage (Uc): (e.g. MDPA-24/BN) Line to line: 30 V min Line to earth: ±160 V min [1] OPTIONS Voltage protection level (Up): Configuration • @ 1 kV (100 A) blank: With Base (model: SK-2E) included Line to line: 45 V max. /BN : Element only for replacement Line to earth: ±650 V max. (Not selectable with DIN rail mounting adapter) • @ 2 kV (1 kA) DIN rail mounting adapter Line to line: 50 V max. blank: Without Line to earth: ±650 V max. /A33: With adapter (model A-33) Response time: Line to line: ≤ 4 nsec. Line to earth: ≤ 20 nsec. RELATED PRODUCTS Leakage current: • Base (model: SK-2E) Line to line: ≤ 5 μA @ 30 V DC Line to earth: ≤ 5 μA @ ±140 V DC GENERAL SPECIFICATIONS Max. discharge current (Imax): 5000 A (8 / 20 μs) Construction: Plug-in Nominal current (IN): 100 mA Connection: M4 screw terminals (torque 0.8 N·m) Internal series resistance: 20 Ω ±10 % (including return) Screw terminal: Nickel-plated steel Capacitance @ 1 MHz: http://www.m-system.co.jp/ MDPA-24 SPECIFICATIONS ES-8258 Rev.5 Page 1/4 MADE IN JAPAN M·RESTER ALM BAT MODEL SER.NO MODEL: MDPA-24 Line to line: ≤ 1000 pF Line to earth: ≤ 100 pF STANDARDS & APPROVALS Surge protection: IEC 61643-21 (Categories C1, C2) EXTERNAL VIEW P+ P– BAT Indicator LED ALM Indicator LED CHK Check Button S+ S– CONNECTION EXAMPLES CENTRAL STATION M-RESTER CURRENT LOOP SUPPLY FROM FIELD + P+ S+ IN – P– S– G (PROTECTED EQUIPMENT) M-RESTER FIELD + P+ S+ CABLE – P– S– TO CENTRAL G G STATION GROUNDING PROTECTED M-RESTER EQUIPMENT G G GROUNDING (100 ohms or less) CROSSOVER WIRE A crossover wire between M-RESTER ground and the ground or metallic housing of the equipment is required for protection. If the protected equipment has no ground terminal, ground the M-RESTER only. When the M-RESTER is mounted with DIN Rail Mounting Adapter, connect the grounding wire to the mounting screw of the M-RESTER. http://www.m-system.co.jp/ MDPA-24 SPECIFICATIONS ES-8258 Rev.5 Page 2/4 MODEL: MDPA-24 EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch) n STADARD 1 (.04) 80 (3.15) 2–5 (.20) dia. 23.5 (.93) MTG HOLE 53 (2.09) 27 (1.06) HEAD ELEMENT P+ P– BASE 4–M4 TERMINAL SCREW S+ S– GROUND TERMINAL (G) (used as mounting bracket) 8.5 n WITH DIN RAIL MOUNTING ADAPTER (.33) 1 (.04) 80 (3.15) [3.3 (.13)] 23.5 (.93) 53 (2.09) 27 (1.06) DIN RAIL 35mm wide P+ P– 4–M4 TERMINAL SCREW S+ S– 2–M4 MOUNTING SCREW (used as ground terminal (G)) MOUNTING REQUIREMENTS unit: mm (inch) 2–M4 SCREW 25 (.97) MIN. http://www.m-system.co.jp/ MDPA-24 SPECIFICATIONS ES-8258 Rev.5 Page 3/4 4 (.16) 100 (3.94) 100 (3.94) 90 (3.54) 90 (3.54) 90 (3.54) 80 (3.15) 80 (3.15) 45 (1.77) 45 (1.77) MODEL: MDPA-24 SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM 20Ω + S P + ELEMENT BAT Voltage Limiter (green) * CHK Check Button Discharge ALM CABLE Element EQUIPMENT (red) SIDE SIDE Surge Leakage Current CT Counter Detector Battery – – S P BASE G GROUND TERMINAL (used as mounting attachment) *The zenor diode has polarity. Zero-cross signal cannot be connected. Specifications are subject to change without notice. http://www.m-system.co.jp/ MDPA-24 SPECIFICATIONS ES-8258 Rev.5 Page 4/4