Rs485 Communications - Profibus (Fex100-Dp) And Modbus (Fex100-Mb) Variants; Test Point Access - ABB WaterMaster FET100 User Manual

WaterMaster FET100
Electromagnetic floweter | Transmitter
3.5.4 RS485 Communications – PROFIBUS (FEX100-DP)
and MODBUS (FEX100-MB) Variants
Fig. 3.9 WaterMaster RS485 Backplane Connections to PROFIBUS / MODBUS Networks

3.5.5 Test Point Access

Note. A typical DVM probe can access (fit) the PCB's test holes.
*These 2 test points are connected on the HART FEX100 backplane only
(they are present on the PROFIBUS FEX100-DP / MODBUS FEX100-MB backplane but are not connected)
Fig. 3.10 Transmitter PCB Board Test Point Access
OI/FET100–EN Rev. A
PROFIBUS / MODBUS
RS485
A1 / B1 – In
A2 / B2 – Out
Screen Clamp
IC+*
31 32
4 to 20 mA
IC–*
Not Used
Frequency Outputs
O/P1
XX
COM
41
O/P2
42
51
O/P3 Alarm Output
61
Not Used
VR
3 Electrical Installation
15