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18
As a policy of continual improvement, RMF reserves the right to alter the specification without prior notice.
201.028 REV 1
Date of Issue: 18 June 2018
flow rate, sometimes leading to flow reversals in time with the pulsations. If the flow is very low this can sweep
the same particle backwards and forwards through the sensing volume multiple times, confusing the results.
6.1.2 Electrical Interface
RMF Systems
’
separate CMS-USBi product is available for those wishing to have a simple plug and play solution
providing connection of the CMS to a computer. This section is for those wishing to do their own wiring to the
product.
6.1.2.1 Electrical Connectors
The CMS has two circular connectors located on the lower face of the unit. The USBi product can be connected to
either one depending on the installation configuration, see figure 6.1.
Pin
Colour
“Machine” Connector
“Remote” Connector
1
Yellow
RS485+/CANL/4-20mA(A)
RS485+
2
Pink
START INPUT
3
Green
RS485-/CANH/4-20mA(B)
RS485-
4
White
OUTPUT 1
5
Grey
I/O COMMON
6
Brown
OUTPUT 2
7
Blue
DC 0V
DC 0V
8
Red
DC +POWER
DC +POWER
6.1.2.1.1 Remote Connector
The ``remote connector’’ is intended for temporary connection of a
n external communication device e.g.
CMSUSBi so as to allow data download, remote control or diagnostics using the RMF-View software.
This is the circular connector furthest from the hydraulic connection, see figure 6.1.
This carries RS485 data and can also be used to power the unit temporarily in the event of a system being shut
down, thus no longer providing power to the unit.
This connector doesn’t send alarm signals as shown in the wiring diagram 6.7. If you require a USBI to send alarm
signals it has to be connected to the machine connector.
6.1.2.1.2 Machine Connector
The ``mac
hine connector’’ is intended for permanent connection to the PLC / machine that powers the
CMS
during normal operation. It has power connections, a start signal input, two relay outputs, and a data pair that
can be set to RS485, CANbus or 4-20mA signaling modes.
This is the circular connector closest to the hydraulic connection, see figure 6.1.
NOTE: If CANBUS or 4-20mA option has been selected, standard communication with an RS485 adapter (e.g.
USBI) on this port is no longer available.
The right hand port (remote connector) should be used if temporary connection is required.
NOTE: Start signal and relay outputs only apply to this connector.
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