11. Wiring
BUDDYBOX with Torque Limiter
Application
Product
42
DANGER
●
Do not handle the unit when cables are live. Be sure to turn off the power when performing operations on the unit; otherwise,
electric shock may result.
●
Connect a power cable to the unit in accordance with the maintenance manual; otherwise, electric shock or fire may result.
●
Do not forcibly bend, pull, or clamp the power cable and lead wires; otherwise, electric shock or fire may result.
CAUTION
●
When wiring, follow the facility's electrical codes and extension regulations to prevent burns, electric shocks, injuries, and fire.
11-1 Wiring for a Spring-Loaded Limit Switch
(1) Limit Switch Type (1-Point Signal, 2-Point Signal, 3-Point Signal)
• When the preset torque is reached, the dog activates the limit switch, which
outputs a signal.
• Depending on manufacturing specifications 1 – 3 point signal output is
available.
(Types that have 1 – 3 limit switches.)
(2) Limit Switch Wiring
[1] Remove the terminal cover on the terminal box, feed
the cabtyre cable through the cable gland for marine
use and connect it to the limit switch terminals.
[2] Of the three lead wires, connect as follows:
For contact point a, terminal symbols C (COMMON)
and NO (NORMALLY OPEN)
For contact point b, terminal symbols C (COMMON)
and NC (NORMALLY CLOSED)
[3] Make wiring within the terminal box. The construction
of the terminal box makes wiring be possible.
[4] The limit switch may activate at startup if startup
torque exceeds preset torque (when shock occurs
at startup, the motor is equipped with a brake, etc.).
In this case, install a motor timer to disable the limit
switch until the load torque becomes less than the
preset torque.
Note : 1. For 2-point signal systems, there are two terminal boxes; for 3-point signal systems,
there are three terminal boxes.
2. The cable gland for marine use conforms to JIS F 8801 (for boxes) and 15-b.
• To prevent moisture from entering the cable port, seal openings with sealant (for example, putty).
• Do not move the position of the limit switch, or the torque limiter does not work properly because preset torque was changed.
Limit switch for
sub-motor
Limit switch for main motor
(Type Z-15GQ-B)
(Type Z-15GQ-22B)
(Type Z-15GQ-B)
Limit switch for
auxiliary signal
Dog
Fig. 36
Limit switch
Cable gland for marine use
Limit switch
lead terminals
Terminal box
Terminal cover
Switch box
Dog
Fig. 37
C NO NC
Fig. 38
