Cameron NUFLO MC-III, User Manual

Page: 23 / 120

23
MC-III™ Panel Mount Flow Analyzer Section 2
TB1
PU
LS
E
IN
PU
T
RE
SE
T
IN
PU
T
TF
M
A&S
GND
TB
3
EXT POWER
TB2
RS
48
5
SL
AV
E
4-2
0
OU
T
PU
LS
E
OU
T
6-3
0 V
DC
J1
J2
RESET
SWITCH
BA
TT
ER
Y
Leave this
end of shield
disconnected.
POWER SUPPLY
5 to 30 VDC
FREQUENCY
READOUT DEVICE
*
Resistor may be included in frequency
readout device. Size the resistor to limit
the current to 50 mA.
4-20 mA and flowmeter frequency
(amp & square) cannot be used
simultaneously.
*
Figure 2.9—Flow meter frequency (amp & square) output wiring
RS-485 Output
The RS-485 output is required for communication with the interface software. Wiring diagrams are provided
for a permanent connection (Figure 2.10), as well as for temporary laptop connections using an RS-485 to RS-
232 converter ( Figure 2.11 and Figure 2.12, page 24 ).
A
B
TB1
PU
LS
E
IN
PU
T
RE
SE
T
IN
PU
T
TF
M
A&S
GND
TB
3
EXT POWER
TB2
RS
48
5
SL
AV
E
4-2
0
OU
T
PU
LS
E
OU
T
6-3
0 V
DC
RS-485
Communications
J1
J2
RESET
SWITCH
BA
TT
ER
Y
Figure 2.10—RS-485 output (permanent connection)