Technical and instalation
manual FLOW 38 Batch Page 23 (of 49) COMAC CAL
s.r.o.
Wiring connection examples – passive impulse output: Terminals
Due to CR≈100% and If = 2.5 mA it is advisable to choose the collector current up to 2.5 mA.
Buttons START, STOP
Applying a signal to the GND terminal 7 or 8 you can start or stop the batch. These terminals are in
batching devices already connected to the control buttons.
Controlling of the batching valve
Terminals 1 and 2 are used to control the relay valve batching device. These terminals are in batching
devices already connected to the control board with relay outputs.
Data output
The Flow 38 Batch meter can be provided with RS485 communication interface with M-Bus protocol
according to EN 1434-3 or ModBus RTU.
Protection degree
The meters meet all the requirements for IP 65 protection degree.
Replacement of tube fuse in the meter
!!! Risk of electric shock! Uncovered components generate dangerous voltages. Before removing the
cover from the electronics area, make sure that the meter is not under voltage!!!
The instrument fuse is on the power supply PCB and it is replaced as follows:
1. Switch off power.
2. Unlock the corner screws and remove the cover instrument boxes
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