_________________________Shihlin Electric SPM-3 User Guide__________________
5
Chapter 3 Connection & Wiring
3.1 Back view of connection ports
1.Aux Power(N-, ,L+)
2.Digital output (Com2 DO2 Com1 DO1)
3.Current Terminal (3L 3S 2L 2S 1L 1S)
4.Lon Port(D-,D+)
5.Voltage Terminal (N,C,B,A)
6.RS485 Port (D-,COM,D+)
3.1.1 Aux. Power Supply
Before powering the instrument, verify the pin position at L+ and N-, leave the middle pin blank.
Power standard is 80-380Vac/100-300Vdc.
Aux. power of this instrument must not be earthed
.
If connecting DC aux. power, make sure the pins are in the right place
3.1.2 Digital Output
2 channel 4 pin digital output (Com2 DO2 Com1 DO1)
External power 12-240VAC-DC/120mA max
Com1 DO1 for digital output1, Com2 DO2 for digital output 2
Port 1 assigned selection:
NONE
、
OVER V/I
、
OVER F
；
UNDER V
/I
、
UNDER F
；
OVER Dmd
；
ANY
。
Port 2 assigned selection: Energy pulse output base on kh (wh / pulse) setting or alarm output
same as port 1
3.1.3 Current Terminal
3 channels/6 terminals current inputs (3L 3S 2L 2S 1L 1S)
Input current range from 8mA to 5A (CT secondary)
Warning
！
The CT input current must not exceed 10A
Warning
！
Make sure to short secondaries of each current transformer before removing the CT connection inputs.
2
3
5
4
6
1