ABB WaterMaster User Manual

WaterMaster
Electromagnetic flowmeter 4 Electrical Installation
IM/WM–EN Rev. M 25
4.6.4 RS485 Communications – PROFIBUS (FEX100–DP) and MODBUS (FEX100–MB)
Variants
4.6.5 Test Point Access
Fig. 4.16 WaterMaster RS485 Backplane Connections to PROFIBUS Network
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
A1 B1 A2 B2 42
52
62
41 51 61
PROFIBUS / MODBUS
RS485
A1 / B1 – In
A2 / B2 – Out
Screen Clamp
31
32
XX
42
41
51
61
VR
IC+*
IC–*
Not Used
O/P1
4 to 20 mA
COM
O/P2
O/P3 Alarm Outputs
Not Used
Frequency Outputs

ABB WaterMaster Specifications

General

Brand	ABB
Model	WaterMaster
Category	Measuring Instruments
Language	English