F1/F2 analog transmitter output
H1 CANopen communication
H2 Modbus RTU communication
H3 Profibus Communication
H4 Caterpillar CCM Engine Communication
H5 MTU/J1939 engine communication
H6 Cummins ECM engine communication
M1 engine control card (Pt100/4-20mA/speed regulation/start stop)
M2 engine control card (VDO/speed regulation/start stop)
M13 7-channel binary input extension
M14 4-channel relay output expansion
M15 4-channel analog input extension (4-20mA)
J1/J2 display cable
J3 PC serial communication cable

Terminal definition and I/O configuration
1. Power board (slot # 1)
Terminal Function Technical Parameter Description
1+12/24V DC 12/24V DC ± 30% power supply positive pole
2 0V DC - Negative pole of power supply
3-4 status relay 24V/1A processor/power status monitoring (normally closed)
5-16 Relays 1-4 250V AC/8A configurable
17-18 synchronous relay 250V AC/8A closing control
20-22 pulse output open electrode kWh/kVArh counting output
23-28 binary input optocoupler isolation alarm suppression/confirmation/start stop synchronization, etc
2. Load distribution and I/O board (slot # 3)
Key terminals:
37-39: Active/Reactive Load Distribution Line (-5... 0... 5V DC)
40-42: Analog setpoint input (-10... 0... 10V DC), used for frequency/active power setting, voltage/VAr/power factor setting
43-55: Binary input, used for load shedding, manual speed/voltage regulation, mode selection, etc
57-64: Relays 5-8, configurable output
3. Communication measurement board (slot # 5)
Terminal functional technical parameters
73-78 Generator three-phase current input 1/5A AC
79-84 generator three-phase voltage input maximum 690V AC (line voltage)
85-89 bus three-phase voltage input maximum 690V AC (line voltage)
4. Engine control card (slot # 7)
M1 option (Pt100/4-20mA):
98-105: 4-channel 4-20mA analog input
106-111: 2-channel Pt100 input (3-wire system, -40 to+250 ° C)
112-113: Speed sensor input (0.5-70V AC, 10-10000Hz)
114-119: Binary inputs (start enable, operation feedback, engine failure, emergency stop, etc.)
120-125: Relay output (start, stop coil, start preparation)
M2 option (VDO sensor):
104-107:3 VDO inputs (oil pressure, water temperature, fuel level)
Other similar to M1
Wiring specifications
1. AC measurement wiring
Multi line 2 supports three wiring modes: three-phase, single-phase, and phase separation. Attention should be paid when wiring:
Neutral wire is only connected when using a three-phase four wire system (terminals 84, 88)
The grounding of the current transformer can be connected to the s1 or s2 terminal
Recommend using 2A slow melting fuse to protect cables
If the "synchronous black start" function is enabled, it is recommended to use an automatic fuse with auxiliary contacts to disable automatic closing when the bus fuse is damaged
2. Relay output
Relay output is used to control loads such as circuit breakers, speed regulators, and voltage regulators. When driving inductive loads (such as contactor coils), noise suppression circuits (such as RC absorption circuits or freewheeling diodes) must be installed, otherwise it may cause the controller to reset unexpectedly.
3. DC connection
Load distribution line:
Shielded cables must be used
Used for active and reactive load distribution when multiple machines are connected in parallel
Binary input:
All binary inputs are bidirectional optocouplers with a working voltage of 12/24V DC
Input on voltage range 8-36V DC, off voltage<2V DC
Typical input impedance 4.7k Ω
Simulated setpoint input:
The set value input is passive and requires external power supply
Active output of PLC or external potentiometer can be used
Pulse output:
The output of the kWh/kVArh counter is in the form of an open collector electrode, with a maximum load of 10mA, and requires external power supply and load resistance
4. Communication interface wiring
CANopen (option H1):
Use shielded twisted pair cables
Terminal resistance 120 Ω
The shielding layer is only grounded at one end
Modbus (Option H2):
RS485 interface, 2-wire system
Recommend using shielded twisted pair cables
Terminal resistors are only used for long distances or multiple nodes (>32)
Profibus (option H3):
Use Belden 3105A or equivalent cable (22 AWG twisted pair shielded)
Terminal resistance 120 Ω
Communication speed up to 12 Mbit/s
Engine communication interface:
H4:Caterpillar CCM(RS232)
H5:MTU/J1939(CAN)
H6:Cummins ECM(Modbus RTU)
5. Display cable
The display cable adopts standard computer extension cable (9-pin Sub-D male/female) or customized cable:
Minimum wire diameter 0.22 mm ²
Maximum length 6 meters
Recommended cable models: Belden 9540, BICC H8146, etc

Technical specifications
1. Measurement accuracy
Basic accuracy: Class 1.0 (IEC/EN 60688)
Negative sequence current: Class 2.0
2. Electrical parameters
Project Parameters
Measure voltage 100-690V AC ± 20% (UL certification: 110-480V AC)
Measure current -/1A or -/5A AC
Current overload capacity 4 × In continuous, 20 × In 10 seconds, 80 × In 1 second
Measurement frequency 30-70 Hz
Auxiliary power supply 12/24V DC (8-36V continuous, 6V for 1 second)
Maximum power consumption of 8W
Electrical isolation voltage/current with other I/O: 3250V AC for 1 minute; Analog output and I/O: 500V DC for 1 minute