EM-8283-A Rev.3
P. 4 / 6
MD6x-24
MD6x-65
■
MD6P
INSTALLATION
• Confirm that the wiring conduit’s thread size of the protected device matches the connecting screw’s thread size of the unit.
• For 1/2 NPT thread, no gasket is provided with shipment. Apply adequate sealant or seal tape for preventing water entering
through the connection.
• After wiring to the MD6T is complete and its cover is closed, be sure to tighten the set screw to ensure the sealing.
TERMINAL CONNECTIONS
• Connect the unit as in the following diagrams.
• Connect the MD6x’s green leadwire to the ground terminal inside the protected equipment enclosure. If the protected
equipment has an outside ground terminal, connect between this terminal and the inside ground terminal.
If the enclosure does not have an inside ground terminal, connect the green leadwire directly to the outside ground wire pulled
inside the enclosure.
• Connect the yellow and blue wires to the signal terminals of the protected equipment.
• Ground the protected equipment enclosure.
If the enclosure has an outside ground terminal, connect the ground wire to it. If it does not, pull the ground wire inside the
enclosure and connect it to the inside ground terminal.
• Connect the signal lines to the MD6x.
■
MD6T
Connect the positive (+) line to the terminal 1, the negative (–) line to the terminal 2.
■
MD6N and MD6P
Connect the red leadwire to the positive (+) line, the black leadwire to the negative (–) line.
■
LEADWIRE DIAMETERS
Terminal block (MD6T): leadwire diameter: 0.14 – 1.5 mm
2
for both stranded and single-core wires; or AWG26 – 16
Cable side (MD6N and MD6P): AWG20
Grounding: AWG20
Protected equipment side: AWG22
CAUTION: The MD6T and the MD6N have a functional ground terminal, but DO NOT USE THIS TERMINAL FOR SURGE
PROTECTION. It is used only when the protected device requires the functional grounding, e.g. for shield line ground to
eliminate EM noise.
G 1/2, 1/2 NPT or M20x1.5
32 (1.26)
27 (1.06)
approx. 250 (9.8)
52 (2.05)
10 (.39)
{17 (.67)}
*
[22 (.87)]
**
*
{ } for M20x1.5 with CENECEC (ATEX) flameproof approval
**
[ ] for 1/2 NPT
