18
Attention
The operations described in this section must be performed by authorized electricians or qualified
technical personnel. If you have any difficulties, contact the manufacturer or agency.
Warning
Tighten the connections terminals to enough torque moment, refer to Table 3.3, and please
ensure correct phase rotation.
The grounding cable and neutral cable must be connected in accordance with local and national
codes.
When the cable holes does not goes through by cables, it should be filled by the hole stopper
3.7 Control and Communication Cables
The rear panel of the UPS provides dry contact interface and communication interface
(RS232
，
RS485,SNMP ,Intelligent card interface and USB port)
，
as it is shown in
Fig.3-6.
Fig.3-6 Dry contact &communication interface
3.7.1 Dry Contact Interface
Dry contact interface includes port J1-J18 and the functions of the dry contact are
shown in Table 3.6.
Table 3.6 Functions of the port
Port
Name
Function
1
IN_DRY1_NC
Input dry contact-1,1-2, (Normally closed)function is settable ,
Default: none
2
Vcc_GJ
VCC
3
IN_DRY2_NO
Input dry contact-2,3-4, (Normally open) function is settable ,
Default: None
4
GND
Ground for Vcc
5
IN_DRY3_NO
Input dry contact-3,5-6, (Normally open) function is settable ,
Summary of Contents for EA990 G5 10
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