Explosion protection
5.2 FM
SITRANS SL
84 Operating Instructions, 12/2010, A5E01132948-04
1/2" NPT
Figure 5-13 Thread size label SITRANS SL
Verification of systems used in hazardous areas (Page 159)
5.2.5 Electric connections in the FM system
The electric connections are done in the receiver and transmitter respectively. The tables
below illustrate the connections in the receiver and the transmitter for the non PROFIBUS
version. The terminals as well as their assignments are described in section Screw terminals
(Page 48).
Sensor connection
The sensor connection connects receiver and the transmitter of the SITRANS SL. The
sensor connection is used to transfer:
● 100 kbps RS-485 communication
● power for the transmitter
● ground.
Table 5- 6 Electric connections for sensor connection, valid for FM product versions
Screw terminals on junction board
Receiver Transmitter
Function / Power
L1 S1 +
L2 S2 -
24 V DC power supply to transmitter unit
L3 S3 Com+
L4 S4 Com-
L5 S5 Sync+
L6 S6 Sync-
RS 485 communication
Chassis Chassis Ground
Gland Gland Ground
To Next Page
Loading...
