Installation Guide
CONFIDENTIAL
TG-0057_19 TM4 SUMO HD CO300-A1_A2_A2.5 Installation Guide
© Dana TM4 inc., 2013-2020
Page 31 of 42
2020-11-20
4.5.7.2 HVIL and EmergencyStop signals/safety circuits
The system will draw power and recharge the high-voltage battery based on the torque request and will
limit the maximum charge/discharge currents as specified using the associated CAN protocol message.
However, in case of hazardous behaviour or maintenance of the traction system, two hardware signals
should be connected for safety purposes:
HVIL
and
EmergencyStop
.
When the system is fully installed and connected, the
HVIL
internal loop is closed therefore resulting in a
short circuit between its two input pins. The
HVIL
signal is used to open the high-voltage battery contactor
when its internal loop is opened during product maintenance or repair (e.g. removal of MCU cover or
disconnection of motor sensor cable) thereby protecting the user.
IMPORTANT NOTE
: Depending on the product model number of the TM4 inverter you are using, there are
two possible default factory settings, either Vaux+ or Vaux-, and therefore two possible EmergencyStop
scenarios. It is the responsibility of the integrator to verify the MCU product model number and then to
implement the HVIL and EmergencyStop safety circuit appropriate to that product.
To implement the necessary HVIL and EmergencyStop safety features:
•
For product models INV-HP2HV_0309-A-01 and INV-HP2HV_0309-06 , see Section 4.5.7.2.1;
•
For all other product models, see Section 4.5.7.2.2.
WARNING
The HVIL line is not current limit protected.
We strongly recommend that you use a fuse as shown in both suggested safety circuits (Figure 13 and
Table 8
HVIL and EmergencyStop – Absolute maximum rating
Specifications
Units
Values
Imax – HVIL steady state
A
2
EmergencyStop steady state
mA
250
EmergencyStop inrush current
A
7
Disclaimer
: Note that if you choose not to implement this circuit, TM4 is not responsible for any effects of
hazardous behaviour or system malfunction during maintenance or due to a situation requiring an
emergency stop.
