Mitsubishi Electric CC-Link IE-NZ2GNSS2-16DTE, Руководство пользователя

Страница: 4 / 170

2
[Design Precautions]
[Design Precautions]
WARNING
● When the safety remote I/O module detects an error in an external power supply or a failure in the
module, it turns off the outputs. Configure an external circuit to ensure that the power source of a
hazard is shut off by turning off the outputs. Failure to do so may result in an accident due to an
incorrect output or malfunction.
● When a load current exceeding the rated current or an overcurrent caused by a load short-circuit
flows, the safety remote I/O module defines it as a fault and turns off the outputs. Note that if the
overcurrent state continues for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.
● At the start-up of the system, if the external power supply is short-circuited by the output wiring of the
safety remote I/O module, or if the external power supply is connected with a wrong polarity, a load
may turn on just after the power-on. Configure an interlock circuit to ensure that the entire system will
always operate safely.
● When a communication failure occurs in the network, the failed station becomes the following status.
Check the communication status information and configure an interlock circuit in the program to
ensure that the entire system will operate safely. Failure to do so may result in an accident due to an
incorrect output or malfunction.
(1) Remote stations turn off all output from terminals.
(2) Remote stations suspend safety communications.
● Do not use any "use prohibited" signals as a remote input or output signal. These signals are reserved
for system use. Do not write any data to the "use prohibited" areas in the remote register. If any of the
"use prohibited" signals are used (turned on or off), or any data is written to the "use prohibited" areas,
the correct operation of the module cannot be guaranteed. For system areas, "use prohibited" areas,
and "use prohibited" signals, refer to "APPENDICES" in the CC-Link IE TSN Remote I/O Module
(With Safety Functions) User's Manual. For areas used for safety communications, they are protected
from being written by users, and thus safety communications failure caused by data writing does not
occur.
● When the fast logic interlock is disabled, it is customer's responsibility to build the interlock circuit
externally so that the entire system always operates safely. Be sure to connect an interlock
mechanism to the output of this I/O module.
●
If the measure to prevent the restart cannot be taken, take other measures and ensure that operators
are safe and machine parts are not damaged even if a device has restarted with the fast logic interlock
disabled.
CAUTION
●
Do not install the cables connected to external devices or the communication cables together with the
main circuit lines or power cables. Keep a distance of 100mm or more between them. Failure to do so
may result in malfunction due to noise.
●
Select the external devices to be connected to the module by referring to the performance
specifications in this manual and considering the maximum inrush current. Connecting a device
exceeding the maximum inrush current may cause malfunction or failure of the module.