FlowCERT

Page 12
Wire the transducer to the FlowCERT’s transducer terminals as follows:
Transducer 1
Terminal Connection Details
Unit Type Green
Screen
Red
Power
White
Signal
Black
0 volts
Wall Mount 37 38 39 40
When using 2-core screened extension cable, the Black and Green wires of
the transducer should be connected to the screen of the extension cable.
For Zone 1 applications a transducer certified to Sira 02ATEX5104X is
used, and must be supplied via a 4000A breaking fuse, which is fitted as
standard to the FlowCERT.
For Zone 0 a transducer certified to Sira 02ATEX2103X is used, which
must be connected to the FlowCERT controller via an external Zener
barrier.
See transducer label for certification details.
Relay Outputs
The five relays can be programmed for a variety of alarms, pump control, or
other process functions. The relay contacts are all rated at 5A at 240V AC.
All connections should be such that the short circuit capacity of the circuits
to which they are connected, is limited by fuses rated so that they do not
exceed the relay rating.
Current Output
There are two isolated (floating) mA outputs (to 150 V), of 4 - 20mA or 0 -
20mA, and the load should not exceed 500 Ω.
Current Input
This feature facilitates the use of suitable devices to provide an input for
level or velocity. The current input is an isolated (floating) mA input (to
150 V), 4 - 20mA or 0 -20mA.
Speedy Velocity Input
This feature allows direct connection of the Speedy velocity sensor, via
RS485 communications, to provide the FlowCERT with an input which is
proportional to the velocity of flow, to enable calculation of flow using the
Area/Velocity formula. For full details and installation instructions of the