Azure Dynamics DMOC445, Руководство по эксплуатации, Страница: 15 / 35

Proprietary
15
DMOC445 Manual and Operating Instructions
The DC connection may be non-shielded. Only 4 AWG 600 V rated cables are to be
used, which need to be properly fused as close as possible to the energy storage system
(ESS). Note that the DMOC does not provide any internal fusing on the high-voltage
connections. It is also very important that ESS be galvanically isolated (i.e. no direct
electrical connection) from the chassis of the vehicle as well as from the low voltage
system of the vehicle.
Some versions of the DMOC do not provide an internal contactor with pre-charge
function. These units are clearly marked as such and require an external pre-charge
mechanism (typically provided by the ESS). If a DMOC is connected without correct pre-
charge, the unit can be damaged.
For additional safety as well as for controlling EMI, the DMOC needs to be grounded to
the frame of the vehicle by means of a braided ground strap (preferably one that is short
and wide in dimension).
3. Low Voltage Power Connections
The DMOC requires a 12 V or 24 V auxiliary supply in order to power its internal circuits
as well as the main contactor (if present) and the cooling fans (in case of an air-cooled
heatsink). Air-cooled inverters need to be configured specifically for one nominal voltage.
Units without fans can operate from either voltage.
The 12/24 V auxiliary supply needs to be able to source 10/5 A of current and must
protected by a 15/7 A fuse. The auxiliary supply also acts as an enable signal for the
internal power supply of the DMOC. In other words, even a DMOC without contactor or
cooling fan requires 12/24 V to be present in order to operate.
4. Signal Connections
Three connectors located on the side of the DMOC cover near the mounting holes
provide all signal connections. Please select mating connectors from the table below.
AMPSEAL connector contacts will accept 20 to 16 AWG wire with insulation diameter of
1.7 – 2.7 mm. Use CERTI-CRIMP Straight Action Hand Tool, AMP P/N: 58440-1.
Table 2. AMPSEAL Automotive Plugs.
No. of positions AMP Brand AMP Connector P/N AMP Terminal P/N
8 AMPSEAL 776286-1 770854-3
35 AMPSEAL 776164-1 770854-3
14 AMPSEAL 776273-1 770854-3
The smallest connector has eight pins and provides the signals for CAN communications
as well as RS-232. A second connector with 16 pins is used for connecting the motor
speed-sensor cable. The third and largest connector has 35 pins and carries general
digital and analog IO pins as well as the inputs for the auxiliary 12/24V power supply.
Application specific connections to the 35-pin connector are described in the applications
user manuals.