SMAR JM1 Quick Installation Manual

JM1
Quick Installation Guide
JM1 is a junction box that allows easy and safe connections for
fieldbus and standard instrumentation wiring as well as for sensors,
actuators and measuring instruments, in hazardous areas or not.
ATTENTION!
This installation guide provides basic guidelines for JM1.
In explosion proof, nonincendive, or intrinsically safe (I.S.)
installations the JM1 must be installed according to local
standards and protection type adopted.
Explosions can result in death or serious injury.
• Do not remove the JM1 cover in explosive environments
when the circuit is live.
• JM1 cover must be fully engaged to meet explosion
proof requirements.
• Use adequate plugs and cable glands to meet explosion
proof requirements.
• In hazardous areas make sure the JM1 is installed
according to required practices for safety and wiring.
Electrical shock can result in death or serious injury.
Avoid contact with the wires and the terminals. High
voltage can be present on wires and can cause electrical
shock.
Step 1: Mounting the JM1
1. The JM1 has to be mounted in a physical arrangement
that provides easy access to open it and connect the wires.
The JM1 should be located in a suitable position, with
convenient access and optimizing the spurs' length.
2. You can attach it directly to the panel or wall, using
adequate screws.
3. Choose the right plugs and cable glands if necessary to
meet explosion proof requirements. Plug and seal unused
conduit connections to comply with IP66/68 protection
requirements.
Step 2: Wiring Connection
The JM1 has an internal connection structure as the following
diagram:
There are three aspects which have to be considered when designing
the shielding and grounding of a fieldbus system:
• Electromagnetic compatibility (EMC);
• Explosion proof protection;
• Personal protection.
Evaluate your system grounding and check with the fieldbus system
supplier the possibility to ground or not the bus shield, within the
JM1.
1. Power off the connections.
2. Remove the JM1 housing cover.
3. Connect the positive wire to the "+" label in the internal
terminal bar, and the negative wire to the "-" label, as well as the
shield cable in the "S" label. Special attention should
be taken when handling and connecting the shield and wires to
avoid short-circuits, shield interruption and/or improper
grounding in contact with the housing. If the bus terminator
(BT302) is necessary, connect it and arrange it adequately.
4. Ground the JM1's housing and the shield according to the
area safe requirements.
5. Close the housing cover, checking if it is tightened to keep
weather proof and explosion proof conditions.
Disassembling Procedure
With the power disconnected, refer to JM1 exploded view to
disassemble.
Indicative dimensions
106
95
- DIMENSIONS IN MILLIMETERS
Spare parts
204-0102 Aluminum Cover
204-0120 Locking mechanism screw
204-0122 O-ring
400-0812 ¾ female NPT to ½ male NPT reduction sleeve, 316 SST Ex d
400-0808 ½ NPT internal hexagon plug, plated CS BR Ex d
400-0809 ½ NPT internal hexagon plug, 304 SST BR Ex d
400-0810 M20 X 1.5 external hexagon plug, 316 SST BR Ex d
400-0811 PG 13.5 external hexagon plug, 316 SST BR Ex d
400-0583-11 ½ NPT internal hexagon plug, plated CS SAE 1020
400-0583-12 ½ NPT internal hexagon plug, 304 SST
1 - Male cover (300 Series)
2 - Cover o-ring
5
3 - Connector screw
4
4 - Connector
3
2
5 - Locking cover screw
6 – Housing 1
7 - External/Internal ground
terminal screw
8 – Washer
9 – Plug
Sep/2012
J M 1 G E
68
14,25
6
6
7
8
9
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