Toshiba BMS-IFWH5E Installation Manual page 7

Energy Monitoring Relay Interface
Wiring Connection
The following describes a connection example of Energy Monitoring Relay Interface.
Shield earthing
• The RS-485 communication cable must be earthed on TCS-NET Relay Interface or central controller. It does not
have to be earthed on Energy Monitoring Relay Interface.
The shielded wire must be crimped with closed end connector. The shielded wire end must be insulated and left
open.
Connection of power meters
• Use a power meter with a pulse generator.
Connect the non-voltage contact output of the power meter to the Energy Monitoring Relay Interface.
An external input circuit is shown below.
Input signal is electrically isolated by photo-coupler.
(1) Example of contact input connection
Energy Monitoring Relay Interface
(2) Example of contact input connection
Energy Monitoring Relay Interface
• Output sink current has polarity.
When they are connected to inappropriate input terminal, the unit may not operate properly.
12V
Input
+ terminal
DI-1 to DI-8
-
12V
Input
terminal
+
DI-1 to DI-8
-
CAUTION
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Installation Manual
Power meter
(with pulse generator)
Contact
Power meter
(with pulse generator)
Current
sink
EN
6-EN