Nakanishi E3000 Operation Manual page 34

* Safety Relay
If an N - O contact becomes welded, all N - C contacts will maintain a minimum distance of 0 . 5 mm
when the coil is not energized.
N - O contacts (Normally - opened contacts) : Contacts of U - U , V - V , W - W .
N - C contacts (Normally - closed contacts) : Contacts of (SAFE - 1 A) - (SAFE - 1 B), (SAFE - 2 A) -
(SAFE - 2 B)
* Machine Safety Circuit is possible when using the Safety Relay Contacts Output
・ When an Emergency Stop Signal input that is coupled to a door open switch of an Industrial
Machine, the Safety Relay will energize and open the Motor Power Line circuit.
・ Contact outputs ((SAFE -
used for detecting the opening of the Motor Power Line. If N - O contacts become welded, contact
outputs will maintain an OFF condition (Open), by Forced Guide Mechanism. Therefore, Safety
Relay can be used as an open signal of a movable guard or operator door with a locking (switch)
mechanism for Industrial Machinery.
16 - 3 External Input / Output Connector Speci cations
CAUTION
・ To minimize RF interference and noise, please keep the length of the cables as short as possible
and route them separately or as far away as possible from high voltage electrical cables.
・ Use only shielded cables to minimize RF interference and noise. Connect the shield to the plug
cover.
・ Connect the shielded line to the Input / Output connector (The shielded line is grounded). Do not
connect another shielded line to any externally powered instrument.
① External Input / Output Connector A ③
Plug Part Number : XM 3 A - 2521 OMRON (or other similar high - quality product)
Cover Part Number : XM 2 S - 2511 OMRON (or other similar high - quality product)
② External Input / Output Connector B ④
Plug Part Number : XM 3 A - 1521 OMRON (or other similar high - quality product)
Cover Part Number : XM 2 S - 1511 OMRON (or other similar high - quality product)
Please prepare a Cover and Plug.
The shielding should be connected to the Cover.
* Use Mounting Screws that are (M 2 . 6 )
Fasten the Connector to the CONTROLLER using Mounting Screws (M 2 . 6 ).
16 - 4 External Input / Output Connector A
1 A) - (SAFE - 1 B), (SAFE - 2 A) - (SAFE - 2 B)) of the N - C contacts can be
③ / B ④ Pin con guration
Connector A ③
Fig. 42
Connector B ④
79