3
INSTALLATION
Mechanical Installation
The Model 340MB transmitter may be surface mounted onto a
panel, attached to DIN rails using adapter clips or wall mounted
using optional enclosures .
Location
Although the Model 340MB device is encapsulated, all wiring
connections are made to exposed terminals . The unit should be
protected from weather and moisture in accordance with electrical
codes and standard trade practices .
In any mounting arrangement, the primary concerns are ease of
wiring and attachment of the programming cable . The unit gener-
ates very little heat so no consideration need be given to cooling
or ventilation .
Surface Mount Installation
The Model 340MB may be mounted to the surface of any panel
using double-sided adhesive tape or by attaching fasteners through
the holes in the mounting flanges of the unit .
dIN rail Mounting
Optional clips snap onto the mounting flanges allowing the Model
340MB to be attached to DIN 15, 32, 35 mm DIN rail systems .
Wall Mounting
Optional metal and plastic enclosures are available for the Model
340MB . The enclosure is first attached to the wall using fasteners
through its mounting holes .
After wiring, the transmitter may be attached to the enclosure
with the terminal headers facing inwards using the slots in the
mounting flanges . As an alternate mounting arrangement, the
Model 340MB may be fastened to the box cover using double-
sided adhesive tape .
Temperature Sensor Installation
The location of the temperature sensors with respect to the flow
sensor is important to the accuracy of the energy calculation . The
temperature sensor installed closest to the flow sensor will be con-
sidered as Temperature Sensor T1 . Temperature sensors should
not be installed closer than a distance equal to 10 pipe diameters
upstream or 5 pipe diameters downstream from the flow sensor .
Irregular velocity profiles caused by improperly located valves, fit-
tings, and thermowells, etc . can lead to inaccurate flow indication
and therefore affect accuracy of the energy calculation .
Figure 2: Model 340MB Metal Box Dimensions
Figure 3: Model 340MB Plastic Box Dimensions
Figure 1: Model 340MB Dimensions
1.60”
(40.6mm)
3.65”
(92.7mm)
2.95”
(74.9mm)
.88”
(22mm)
.60”
(15mm)
Model: 340MB
S/N 340MB-XXXXXX
Comm LED
Data
Industrial
RTU/ASCII
Se
nso
r In
pu
t
Shield
Signal
Power Out
-
REF
+
_
Modbus
Fac
tor
y P
or
t
NT
PD
PU
D.I.C.
Comm
Port
+
-
Po
wer In
AC C /DC
AC L /DC
1
2
3
Temp 1
1
3
Temp 2
2
Input LED
.20”
(5mm)
PRELIMINARY
