Status Led; Tx/Rx Led - Siemens LME7 Series Technical Instructions

Technical Instructions
Document No. LME-1000
Connection to the BMS
The connection from the BMS to the OCI417.10 is via terminal block. The physical medium is
RS-485. Multiple RS-485 nodes may be connected in a daisy-chain. For long runs (typically
greater than 1,000 feet) or noisy environments, termination may be required on the end node.
Terminal designations:

Status LED

The status LED annunciates the status of the OCI417.10 and the connection to the LME7...
Green / Red Alternating

Tx/Rx LED

The LED will flash red to indicate incoming communication on the RS-485 connection. The LED
will flash green to indicate outgoing communication. With normal communication, the LED will
rapidly alternate between green and red. NOTE: If the poll rate is fast the flashes may be very
brief and hard to notice.
Section 8
Label
A
B
G RS-485 Common Ground
Color
Green Flashing
Red Flashing
Function
RS-485 Data (+)
RS-485 Data (-)
Status
No Connection to LME7...
Communicating with LME7...
Internal Error OCI417.10
Page 2
LME Series
SCC Inc.