MMDH MSYSTEM | Alldatasheet
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Technical content
MODEL: MMDH http://www.m-system.co.jp/ MMDH SPECIFICATIONS ES-8185 Rev.1 Page 1/3 Lightning Surge Protectors for Electronics Equipment M-RESTER LIGHTNING SURGE PROTECTOR FOR STANDARD SIGNAL LINE USE (high speed/high discharge current capacity) Functions & Features
- Designed specifically for 4 – 20 mA DC line including both 4-wire and 2-wire transmitters
- Discharge current capacity 20000 A
- Absorbing surges only without affecting instrumentation signal Typical Applications
- High discharge current capacity is beneficial for use in area with frequent lightnings G (2.56) 128 (5.04) (2.36) mm (inch) MODEL: MMDH–24
ORDERING INFORMATION
- Code number: MMDH-24 OPERATIONAL VOLTAGE 24: 24 V DC
RELATED PRODUCTS
- Lightning arrester for power supply use (model: MMAH) GENERAL SPECIFICATIONS Construction: Wall-mounted, front terminals; terminal cover provided Connection: M4 screw terminals (torque 0.8 N·m) Screw terminal: Nickel-plated steel Housing material: Steel plate t = 1.6 (black) INSTALLATION Operating temperature: -5 to +55°C (23 to 131°F) Operating humidity: 30 to 90 %RH (non-condensing) Mounting: Surface Weight: 440 g (0.97 lbs) PERFORMANCE Discharge voltage (peak voltage) Line to line: ±40 V min. Line to ground: ±290 V min. Maximum surge voltage Line to line: ±50V max. Line to ground: ±800 V max. (The maximum voltage that could pass through this surge protector. Protected equipment must be able to withstand this voltage for very short time period.) Response time: 4 nsec. Leakage current Line to line: ≤ 5 μA at ±30 V DC Line to ground: ≤ 5 μA at ±140 V DC Discharge current capacity: 20000 A (8 / 20 μsec.) Maximum load current: 0.1 A Internal series resistance: ≤ 0.4 Ω (including return) Maximum line voltage: ±30 V
MODEL: MMDH http://www.m-system.co.jp/ MMDH SPECIFICATIONS ES-8185 Rev.1 Page 2/3 CONNECTION EXAMPLES CURRENT LOOP SUPPLY (protected device) 2-WIRE TRANSMITTER (protected device) M-RESTER IN M-RESTER CENTRAL STATION FIELD PANEL GROUNDING PANEL GROUNDING G FROM FIELD TO CENTRAL STATION – P2 CABLE G G GROUNDING M-RESTER PROTECTED EQUIPMENT GG CROSSOVER WIRE GROUNDING (100 ohms or less) A crossover wire between M-RESTER ground and ground or metallic housing of equipment is required for protection. If the protected equipment has no ground terminal, ground the M-RESTER only. DIMENSIONS unit: mm (inch) 40 (1.57) 110 (4.33) 60 (2.36) 18 (.71)45 (1.77) 57 (2.24) 65 (2.56) 8 (.31) G 4–4 (.16) dia. SURGE SIDE PROTECT SIDE
MODEL: MMDH http://www.m-system.co.jp/ MMDH SPECIFICATIONS ES-8185 Rev.1 Page 3/3 MOUNTING REQUIREMENTS unit: mm (inch) 40 (1.57) 57 (2.24) 70 (2.76) min. 57 (2.24) 4–M3 SCREW SCHEMATIC CIRCUITRY S1 P1 P2 S2 Discharge Elements Voltage Limiting Circuit G TO CABLE TO EQUIP- MENT Specifications are subject to change without notice.