MD7AST-24FG/Q [MSYSTEM]
Lightning Surge Protectors for;
| 型号： | MD7AST-24FG/Q |
| 厂家： | 
M-SYSTEM |
| 描述： | Lightning Surge Protectors for |
| 文件： | 总4页 (文件大小：127K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MODEL: MD7AST
Lightning Surge Protectors for
Electronics Equipment M-RESTER
[2] SHIELD TERMINAL (line / earth)
FF: Floating / Floating
FG: Floating / Grounding
LIGHTNING SURGE PROTECTOR FOR
[3] OPTIONS
blank: none
STANDARD SIGNAL LINE
(ultra-slim; life monitor)
/Q: With options (specify the specification)
Functions & Features
• High discharge current capacity 20 kA (8 / 20 μs), 1 kA (10
/ 350 μs)
SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
• 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
/C02: Polyurethane coating
GENERAL SPECIFICATIONS
Construction: Slim-sized front terminal structure
Degree of protection: IP20
• Life monitor function helps you to decide when you should
replace the surge protector; reduces maintenance and
prevents downtime
Connection: Euro terminal block (torque 0.3 N·m)
• Incorporated battery
Applicable wire size: 0.2 – 2.5 mm
2, stripped length 8 mm
• Pressing CHK (Check) button confirms with
LEDs the degradation and life span of the surge protection
circuits
Grounding: DIN Rail
Housing material: Flame-resistant resin (black)
Indicators: Activated by CHK (Check) button
BAT: Green LED
ALM: Red LED
Degradation judged: When the leakage current at the
voltage limiter exceeds approx. 7.5 μA.
Life time judged: When the count of the discharge element
discharging reaches the expected life span.
CHK button: Push button; momentary
7 [.28]
95
[3.74]
Battery: Lithium; No recharge or replacement available.
Battery life: 10 years (when used ≤ 2 minutes/month)
100
[3.94]
INSTALLATION
mm [inch]
Operating temperature: -5 to +55°C (23 to 131°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.
MODEL: MD7AST–[1][2][3]
Weight: 70 g (2.5 oz)
ORDERING INFORMATION
• Code number: MD7AST-[1][2][3]
Specify a code from below for each of [1] through [3].
(e.g. MD7AST-24FF/Q)
• Specify the specification for option code /Q
(e.g. /C01)
[1] NOMINAL VOLTAGE
24: 24 V DC
60: 60 V DC
MD7AST SPECIFICATIONS
ES-8067 Rev.5 Page 1/4
https://www.m-system.co.jp/
MODEL: MD7AST
PERFORMANCE
MODEL NO.
NOMINAL VOLTAGE
MD7AST-24
MD7AST-60
FG
SHLD TERMINAL
Line to Line
FF
FG
FF
Max. continuous
operating voltage
(Uc)
30V
70V
Line to Earth
Line to SHLD
SHLD to Earth
±±60V
±±60V
±±60V
±±60V
short
±±60V
short
±±60V
Voltage protection Line to Line
level (Up)
@6kV (±.2 / 50 µs)
60V
±±5V
Line to Earth
±ꢀ00V
±ꢀ00V
±ꢀ00V
short
Line to SHLD
±±200V
±ꢀ00V
±ꢀ00V
short
±±200V
±ꢀ00V
SHLD to Earth
Leakage current
@Uc
Line to Line
≤ 5µA
≤ 5µA
≤ 5µA
≤ 5µA
≤ 4 nsec.
≤ 20 nsec.
Other sections
Line to Line
Response time
≤ 4 nsec.
≤ 20 nsec.
Other sections
Max. discharge current (Imax)
Nominal current (IN)
20kA (ꢀ / 20 µs), ±.0kA (±0 / 350 µs)
250mA
Internal series resistance
Surge protection
4.7Ω ±±0% per line
±0Ω ±±0% per line
IEC 6±643-2± Categories C±, C2, D±
STANDARDS & APPROVALS
EU conformity:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
EXTERNAL VIEW
CHK Check Button
ALM Indicator LED
BAT Indicator LED
MD7AST SPECIFICATIONS
ES-8067 Rev.5 Page 2/4
https://www.m-system.co.jp/
MODEL: MD7AST
CONNECTION EXAMPLES
4 – 20mA Field-mount
Transmitter Surge Protector
Surge Side
Protected Side Current Loop Supply
+
–
+
–
4
5
8
1
2
*4
FG
(model: MD6x)
(SHLD)
DIN RAIL
ADAPTOR
*3
Crossover Wire
*1
DIN RAIL
*2
*1.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.
*2.Be sure to ground the DIN rail. Recommended grounding resistance ≤100Ω
*3.Cross-wire between the DIN rail and the metal housing of the protected device to equalize the earth potential.
Ground only the surge protector when the protected device has no ground terminal.
*4.Shield wiring method is an example. Proceed according to the system requirements.
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
8–M3 EURO
TERMINAL
WIRE INSERTION ANGLE: approx. 20°
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 [.05])
100 [3.94]
7
[.28]
MD7AST SPECIFICATIONS
ES-8067 Rev.5 Page 3/4
https://www.m-system.co.jp/
MODEL: MD7AST
SCHEMATIC CIRCUITRY
SHIELD TERMINAL
SCHEMATIC CIRCUITRY
APPLICATIONS
•Line to SHLD: •MD7AST-xFF
Floating
•Standard type
•To protect a device having
isolation between Signal
and Earth.
•When SHLD should be
floating against the earth.
(single-end grounding)
Surge Side
Protected Side
•Earth to SHLD:
Floating
Series Resistance
+
–
+
4
5
1
Voltage Limiter
Leak. Curr.
Detector
DISCHARGE
ELEMENT
–
2
BAT
(green)
DISCHARGE
ELEMENT
CHK
Check
Button
ALM
(red)
6
8
3
7
Surge
Counter
CT
Battery
DIN RAIL ADAPTOR
(for grounding)
(SHLD)
DIN RAIL
Grounding
•Line to SHLD: •MD7AST-xFG
Floating
•To protect a device having
isolation between Signal
and Earth.
•When SHLD should be
grounded. (single- or both-
end grounding)
Surge Side
Protected Side
•Earth to SHLD:
Grounding
Series Resistance
+
–
+
4
5
1
Voltage Limiter
DISCHARGE
ELEMENT
Leak. Curr.
Detector
–
2
BAT
(green)
CHK
Check
Button
ALM
(red)
6
8
3
7
Surge
Counter
CT
Battery
DIN RAIL ADAPTOR
(for grounding)
(SHLD)
DIN RAIL
Grounding
Specifications are subject to change without notice.
MD7AST SPECIFICATIONS
ES-8067 Rev.5 Page 4/4
https://www.m-system.co.jp/
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