OPTI-UPS MD120L - Manual (Page 22)

Chapter 1 Installation
19
J10
U
T
I_
F
A
IL
_
N
C
U
T
I_
F
A
IL
_
N
O
G
N
D
Fig 1-19 Mains failure warning dry contact interface diagram
Table 1-9 Mains failure warning dry contact interface description
Position Name Purpose
J9.1 UTI_FAIL_NC
Mains failure warning relay(normally closed) will be open during
warning
J9.2 UTI_FAIL_NO
Mains failure warning relay (normally open) will be closed during
warning
J9.3 GND Centre of mains failure warning relay
1.7.8 RS232 Port and SNMP Card Port
RS232 and RS485 Port: provide serial data which can be used for commissioning and maintenance
by authorized engineers or maintainers, or can be used for networking or integrated monitoring system in
the service room.
SNMP Card Port: used for field installation of the communication option card(SNMP card).
1.7.9 LBS (Load Bus Synchronizer) Port
The dual bus system (DBS) consists of two independent UPS rack module systems, as shown in fig
1-20. The dual bus system is configured for high availability and is suitable for powering the load with
dual inputs. If the load is single-input load, the static transfer switch and LBS control is recommended to
maintain both UPS outputs synchronized for uninterrupted transfers. Please install the system according
to the installation descriptions for different system configurations.
The dual bus system is supported by UPS, it requires connecting the LBS signal cables of two UPS
when constructing the dual bus system; please refer to relevant chapter for detailed configuration and
installation, and the system software shall be configured as required.
UPS 1
LBS
监控旁路模块 UPS 2
LBS
监控旁路模块
Fig 1-20 LBS Connection Diagram
1.8 Installation Drawing
Please refer to fig 1-21, fig 1-22, fig 1-23 and fig 1-24:
UPS 1 monitoring
bypass module
UPS 2 monitoring
bypass module