Hitachi SJ300 Series Replacement Manual page 16

While the J-DG supports 12-bit data input, 16-bit data input is possible with the SJ-DG.
When replacing J-DG with SJ-DG, match upper bit (MSB) and short lower 4 bit to the D4
terminal or input the same data as in D4.
D11 D10 D9
D15 D14 D13
(6) J-CM (Communication PCB)
SJ300 has RS-485 serial communication interface as standard.
Item
Interface
Communication
mode /
Synchronization
Transmission
speed
Transmission
distance
Start convention
(7) J-HR (High resolution analog input PCB)
The SJ300 has analog input filter function as standard. With this function, the inverter can
operate by the input from O, O2, and OI terminal with the precision equivalent to that of J-HR.
It becomes equivalent to J-HR by increasing the filter setting to the maximum value of 30.
Calculation time of 10ms to 60ms is required for the filter setting of 1 to 30.
D6 D5 D4
D8 D7
D12 D11 D10 D9
D8
Wiring when replacing
J-CM (J300)
RS-485 1 port (Terminal) 1:N (Maximum 32 stations)
Half duplex / Synchronization
300/600/1200/4800/9600bps
One-way start from host device command
Chart 11
Communication method comparison chart
Function code
A016
Chart 12
SJ300 analog input filter
J-DG
D2 D1 D0
D3
D6 D5 D3
D4
D7
Figure 16
2400/4800/9600/19200bps
Maximum 250m
Setting Range
Range n=1 to 30,
Where n = number of samples
for average
16/24
SJ-DG
D2 D1 D0
SJ300