HM-BLE User Manual
MAN-1022 2/11/2015 v1
Designed and Produced under
Page 3 of 8
ISO 9001:2008 Certification
Installation
Step 1) Turn on the HM-BLE Bluetooth HART Modem
Press the power button on the Bluetooth HART Modem, the green
“Power” LED will illuminate if there is
sufficient charge in the battery. If the “Power” LED does not
illuminate, see the section on recharging
the modem. The modem does not need to be connected to the HART device/network at this stage.
Step 2) Open the DevCom.iOS app
Launch the DevCom.iOS App on your iPAD/iPhone. The App will scan for available HM-BLE Bluetooth
HART Modems, s
imply select the desired modem in the list. The scan name is “HART BLE
Modem”.
Multiple HM-BLE Modems
When several modems are in the same area, it may require trial and error to determine
which modem is connected to the desired HART network, alternatively you can turn off the other
modems so only the powered modem is visible.
Step 3) Connect the leads of the Bluetooth HART Modem to a HART device/network
The modem can be connected in one of two ways: across the loop load resistor (A
–
B) or across the
HART transmitter terminals (C
–
D). See the relevant Figure 1a, 1b or 1c below.
Figure 1a. Loop Powered HART Transmitter Connection
Figure 1b. 4-Wire HART Transmitter Connection
Figure 1c. Multi-drop HART Transmitter Connection
Step 4) Power your HART device/network
No external power sources are required for the HART Modem (HM-BLE) as it is powered from its internal
rechargeable Li-ion battery. As shown in Figures 1a, 1b and 1c (above) the HART device should be
powered as per the
manufacturer’s instructions.
Loop
Power
Supply
+
-
HART
Transmitter
+
-
Loop Resistor
A
B
C
D
Loop Resistor
C
A
Power
Supply
+
-
HART
Transmitter
+
-
+
-
D
A
B
Loop
Power
Supply
+
-
H
A
R
T
Tr
a
n
s
m
itt
e
r
+
-
Loop Resistor
B
C
A
D
H
A
R
T
Tr
a
n
s
m
itt
e
r
+
-
H
A
R
T
Tr
a
n
s
m
itt
e
r
+
-
