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

WaterMaster
Electromagnetic flowmeter
4.6.4 RS485 Communications – PROFIBUS (FEX100–DP) and MODBUS (FEX100–MB)
Variants
PROFIBUS / MODBUS
Fig. 4.16 WaterMaster RS485 Backplane Connections to PROFIBUS Network

4.6.5 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 and MODBUS FEX100–MB backplanes but are not connected)
Fig. 4.17 Transmitter PCB Board Test Point Access
IM/WM–EN Rev. M
A1 B1 A2 B2 42 41 51 61
52
62
RS485
A1 / B1 – In
A2 / B2 – Out
Screen Clamp
IC+*
IC–*
31 32
XX
4 to 20 mA
Not Used
Frequency Outputs
O/P1
COM
41
O/P2
42
51
O/P3 Alarm Outputs
61
Not Used
VR
4 Electrical Installation
25