Blaze EMS-2 Operating Manual
Page 60
10.11 Closed Loop Current Sensor
The MGL Avionics magnetic closed loop current sensor provides a 0.5V to 4.5Vdc output voltage which is proportional to
a 50A bi-directional input current.
Advantages of closed loop current sensors over conventional current measurements techniques is that they provide the
highest accuracy, are ideal for noisy electrical environments and they provide complete electrical isolation f rom the
current carrying conductor.
Please see the MGL Avionics Closed Loop Current Sensor manual for connection information
10.12 Senders that are grounded in the engine block
Single wire senders require that their mounting arrangement (thread) has a very good electrical contact with the engine
block. Avoid the use of any sealant or tapes as these may cause a bad electrical connection. Further to this it is very
important that the engine block has a good electrical connection to the negative supply terminal of the EMS-2. Any
voltage drop caused by other equipment on the ground wire will cause incorrect readings. The best way to ensure a good
connection is to wire a single connection between the EMS-2 ground terminal (any of these terminals) and the engine
block. Do not wire this anywhere else and do not allow any other equipment to use this wire as a current return path.
10.13 External RDAC (Remote Data Acquisition) Connection (Optional)
The EMS-2 can use an external RDAC unit as the source for the analog signals. Using an external RDAC may be
beneficial as it will reduce the wiring from the engine compartment to the cockpit. Only the CAN High and CAN Low
connections need to be made between the RDAC unit and the EMS-2 in order for this to work. Select
“RDAC”
for the data
source in the various setup menus if using the external RDAC option. The RDAC unit is optional and is purchased
separately.
EMS-2 Analog Channel 1 = RDAC OILT
EMS-2 Analog Channel 2 = RDAC OILP
EMS-2 Analog Channel 3 = RDAC AUX1
EMS-2 Analog Channel 4 = RDAC AUX2
For Fuel level RDAC connections:
EMS-2 Analog Channel 1 = RDAC FL1
EMS-2 Analog Channel 2 = RDAC FL2
EMS-2 Analog Channel 3 = RDAC FL1
EMS-2 Analog Channel 4 = RDAC FL2