Loading And Installation; Handling Precautions - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION

4.3 Loading and Installation

4.3.1 Handling precautions

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This section provides the handling precautions, from unpacking to installation of the
network module.
For details of the loading and installation of the network module, refer to QCPU User's
Manual (Hardware Design, Maintenance and Inspection).
This section describes precautions for handling the network module itself.
(1) Since the module case is made of resin, do not drop the module or apply a strong
impact to it.
(2) Do not remove the printed-circuit board of the module from the case.
Doing so will cause failure.
(3) Prevent foreign matter such as dust or wire chips from entering the module.
Failure to do so may cause a fire, failure, or malfunction.
(4) A protective film is attached to the module top to prevent foreign matter such as
wire chips from entering the module during wiring. Do not remove the film during
wiring.
Be sure to remove it for heat dissipation before system operation.
(5) Before handling the module, touch a grounded metal object to discharge the
static electricity from the human body.
Not doing so may cause a failure or malfunction of the module.
(6) Tighten the screws such as module fixing screws within the following ranges.
Screw location
Module fixing screw (M3 screw)
Terminal screw on external power supply
terminal block (M3 screw)
Spring clamp terminal block fixing screw
(M2.5 screw)
1: The module can be easily fixed onto the base unit using the hook at the top of the module.
However, it is recommended to secure the module with the module fixing screw if the
module is subject to significant vibration.
Tightening torque range
1
MELSEC-Q
0.36 to 0.48 N • m
0.42 to 0.58 N • m
0.20 to 0.30 N • m
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