HGM6100LT Series Genset Controller User Manual                                                                  Page 43 of 50 
13.5  CUMMINS GCS-MODBUS 
It is suitable for GCS engine control module. Use RS485-MODBUS to read information of engine. Engine 
types are QSX15, QST30, QSK23/45/60/78 and so on. 
Table 21 – D-SUB Connector 6 
Set  programmable  output  1  as  “Fuel 
Output”.  Outside  expand  relay,  when  fuel 
output,  connect  port  06  and  08  of  the 
connector. 
Connect to starter coil directly. 
Table 22 – D-SUB Connector 06 
CAN  communication  shielding  line 
(connect to ECU terminal only). 
Using impedance 120Ω connecting line. 
Using impedance 120Ω connecting line. 
Engine type: Cummins QSK-MODBUS, Cummins QST-MODBUS, Cummins QSX-MODBUS. 
13.6  CUMMINS QSM11 
Table 23 – Engine OEM Connector 
Set  programmable  output  1  as  “Fuel 
Output”. 
Connect with starter coil directly. 
CAN communication shielding line. 
Using impedance 120Ω connecting line. 
Using impedance 120Ω connecting line. 
Engine type: common J1939.