ES-8067 Rev.6
MD7AST
Lightning Surge Protectors for
Electronics Equipment M-RESTER
LIGHTNING SURGE PROTECTOR FOR
STANDARD SIGNAL LINE
(ultra-slim; life monitor)
Functions & Features
• High discharge current capacity 20 kA (8 / 20 μs), 1 kA (10 / 350 μs)
• 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
• Life monitor function helps you to decide when you should replace the surge protector; reduces maintenance and prevents downtime
• Incorporated battery
• Pressing CHK (Check) button confirms with
LEDs the degradation and life span of the surge protection circuits
MODEL: MD7AST–[1][2][3]
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
[2] SHIELD TERMINAL (line / earth)
FF
: Floating / Floating
FG
: Floating / Grounding
[3] OPTIONS
blank
: none
/Q
: With options (specify the specification)
SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
GENERAL SPECIFICATIONS
Construction
: Slim-sized front terminal structure
Degree of protection
: IP20
Connection
: Euro terminal block (torque 0.3 N·m)
Applicable wire size
: 0.2 – 2.5 mm
2
, stripped length 8 mm
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
Battery
: Lithium; No recharge or replacement available.
Battery life
: 10 years (when used ≤ 2 minutes/month)
INSTALLATION
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.
Weight
: 70 g (2.5 oz)
PERFORMANCE
STANDARDS & APPROVALS
EU conformity
:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
EXTERNAL VIEW
CONNECTION EXAMPLES
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY