Chapter 1 Installation
MUST400_User manual_EN_REV02 User Manual
19
Position
Name
Purpose
J4.1
EPO_NC
EPO is activated when disconnecting fromJ4.2
J4.2
＋
24V
+24V, connect the common terminal of NC and NO
J4.3
EPO_NO
EPO is activated when shorting with J4.2
The EPO is triggered when shorting pin 2 and 3 or opening pin 2 and 1 of J4.
If an external emergency stop facility is required, it is connected via the reserved terminals of J4. The external
emergency stop facility needs to use shielded cables to connect to the normally open/closed remote stop
switch between these two pins. If this facility is not used, then pin 3 and pin 4 of J4 must be open, or pin 1 and
pin 2 of J4 must be shorted.
1.7.4 Generator Input Dry Contact
J5 is the status interface for generator connection. Connect J5-2 with J5-1, it indicates that the generator has
been connected with the system. The interface diagram is shown in fig.1-7, and interface description is shown
in table.1-5.
J5
+24V
AUX_N.O.
AUX_N.O.
Gernerator
Fig.1- 7: Connection of Generator
Note
1. The emergency stop action within the UPS will shut down the rectifier, inverter and static bypass. However, it
does not internally disconnect the mains input power supply. To disconnect ALL power to the UPS, open the
upstream input circuit breaker(s) when the EPO is activated.
2. Pin 1 and 2 of J4 have been shorted before the UPS is delivered.
3. All auxiliary cables must be double insulated twisted cables with cross sectional area of 0.5mm2 ~
1.5mm2 for maximum connection length between 25m and 50m.
警告
危 险
