MD74R-FG [MSYSTEM]
Lightning Surge Protectors for Electronics Equipment M-RESTER;
| 型号： | MD74R-FG |
| 厂家： | 
M-SYSTEM |
| 描述： | Lightning Surge Protectors for Electronics Equipment M-RESTER |
| 文件： | 总3页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MODEL: MD74R
Lightning Surge Protectors for
Electronics Equipment M-RESTER
GENERAL SPECIFICATIONS
Construction: Slim-sized front terminal structure
Degree of protection: IP20
Connection: Euro terminal block (torque 0.3 N·m)
LIGHTNING SURGE PROTECTOR FOR
Applicable wire size: 0.2 – 2.5 mm2, stripped length 8 mm
RS-485 / RS-422
Grounding: DIN Rail
(ultra-slim)
Housing material: Flame-resistant resin (black)
Functions & Features
• High discharge current capacity 20 kA (8 / 20 μs), 1 kA (10
/ 350 μs)
INSTALLATION
Operating temperature: -25 to +85°C (-13 to +185°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: DIN Rail (TH35-7.5, 1-mm-thick)
Oxide film on the surface of an aluminium DIN rail may
lower the electric conductivity between this module and the
ground. Use a steel or copper rail.
• Ultra-thin 7-mm-wide module can be mounted in high
density
• Excellent protection employing multi-stage SPD circuits
• DIN rail mounting and grounding
• Shield terminal provided
Weight: 70 g (2.5 oz)
7 [.28]
95
[3.74]
98
[3.86]
mm [inch]
MODEL: MD74R–[1][2]
ORDERING INFORMATION
• Code number: MD74R-[1][2]
Specify a code from below for each of [1] and [2].
(e.g. MD74R-FG/Q)
• Specify the specification for option code /Q
(e.g. /C01)
[1] SHIELD TERMINAL (to earth)
FF: Floating
FG: Grounding
[2] OPTIONS
blank: none
/Q: Options other than the above (specify the specification)
SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
/C02: Polyurethane coating
MD74R SPECIFICATIONS
ES-8058 Rev.11 Page 1/3
https://www.m-system.co.jp/
MODEL: MD74R
PERFORMANCE
LINE TO LINE
±±5
LINE TO SG
LINE/SG TO EARTH
SHLD TO EARTH
±ꢀ605*ꢀ
Max. continuous operating voltage (Uc)
±5
±ꢀ605
±ꢁ005
5oltage protection level (Up)
@4k5 (ꢀ.2 / ±0 µs)
±2±5
2±5
±ꢁ005*ꢀ
Leakage current @Uc
Response time
≤ 200µA
≤ 4 nsec.
300 pF
≤ 200µA
≤ 4 nsec.
300 pF
≤ ꢀ0µA
≤ 20 nsec.
ꢀ00 pF
≤ ꢀ0µA*ꢀ
≤ 20 nsec.*ꢀ
ꢀ00 pF
Approx. capacitance @ ꢀ00 kHz
Max. discharge current (Imax)
Nominal current (IN)
20kA (ꢁ / 20 µs), ꢀ.0kA (ꢀ0 / 3±0 µs)
ꢀ00mA
Internal series resistance
Input attenuation
2Ω ±ꢀ0% per line
-0.± dB max. @DC...2.0 MHz, Z0 = ꢀꢀ0Ω
IEC 6ꢀ643-2ꢀ Categories Cꢀ, C2, Dꢀ
Surge protection
*ꢀ. 5alues for the $oating type (FF). Shortcircuited for the grounding type (FG).
STANDARDS & APPROVALS
EU conformity:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
8–M3 EURO
WIRE INSERTION ANGLE: approx. 20°
TERMINAL
8
6
5
4
8
DIN RAIL
ADAPTOR
6
5
DIN RAIL
4
(35 mm wide)
1
2
3
7
1
2
3
7
(1.5 [.06])
98 [3.86]
7
[.28]
MD74R SPECIFICATIONS
ES-8058 Rev.11 Page 2/3
https://www.m-system.co.jp/
MODEL: MD74R
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
Protected
Side
Surge
Side
Surge
Side
Protected
Side
*1
MD74R-FG
MD74R-FF
Protected Device
+
Protected Device
+
Series Resistance
Series Resistance
1
4
4
1
DISCHARGE
ELEMENT
DISCHARGE
ELEMENT
LINE
–
LINE
–
2
3
7
5
6
8
5
6
8
2
3
7
SG
SG
*2
SHLD
SHLD
DISCHARGE
ELEMENT
DISCHARGE
ELEMENT
(SHLD)
(SHLD)
DIN RAIL ADAPTOR
(for grounding)
DIN RAIL ADAPTOR
(for grounding)
FG
FG
*5
Crossover Wire
*3
*3
*5
Crossover Wire
DIN RAIL
DIN RAIL
*4
*4
Grounding
Grounding
*1. Choose the MD74R-FG when the shield wire is to be grounded.
*2. When SHLD and SG terminals are not isolated, DO NOT connect the surge protector’s terminal 7 to SHLD.
*3. Oxide film on the surface of an aluminium rail may lower the electric conductivity between this module and the ground.
Use a steel or copper rail.
*4. Be sure to ground the DIN rail. Recommended grounding resistance max. 100 ohms.
*5. Cross-wire from the DIN rail to the metal housing of the protected device to equalize the ground potential.
Ground only the surge protector when the protected device has no grounding terminal.
Specifications are subject to change without notice.
MD74R SPECIFICATIONS
ES-8058 Rev.11 Page 3/3
https://www.m-system.co.jp/
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