Flintec II IPC - Manual (Page 9)

FlintWeigh II IPC Technical Manual, Rev. 1.06 November 2011 Page 9 of 36
4.1.1. Connector for Standard Load Cells
The connectors J1 and J2 can be used for connecting standard load cells in 4– or 6–wire technique.
Hint: If 4–wire technique will be used, then pin no. 1 and no. 2 as well as pin no. 4 and no. 5 have to be short-
circuited.
It is mandatory to interconnect the shield of the connection cable with one of the shield connector pins
(pin no. 3, 6 or 9).
Pin no. Signal Description
1 + Excitation Excitation, positive pol
2 + Sense Sense, positive pol
3 Shield Shield connector for load cell connection cable
4 – Sense Sense, negative pol
5 – Excitation Excitation, negative pol
6 Shield Shield connector for load cell connection cable
7 + Signal Measurement signal, positive pol
8 – Signal Measurement signal, negative pol
9 Shield Shield connector for load cell connection cable
Tab. 4.1: Plug connector for standard load cells (J1 / J2)
4.1.2. Connector for Digital Load Cells and Digital I/O
The connector J3 provides a RS485 bus interface and a power supply for the digital load cells.
IMPORTANT: It is mandatory to leave pin no. 2 unconnected, if the digital load cells are powered externally,
see also chapter 4.3.
The connector also provides the digital I/O interfaces,see chapter 4.4.
Pin no. Signal Description
1 GND Power supply
+12V DC / 450 mA
2 +12V DC
3 RS485 A RS485 bus – non-inverted Signal
4 RS485 B RS485 bus – inverted signal
5 IO - GND Digital I/O – signal ground
6 IO - In1 Digital I/O – input
7 IO - Out1 Digital I/O – output 1
8 IO - Out2 Digital I/O – output 2
Tab. 4.2: Plug connector for digital load cells and digital I/O (J3)
Fig. 4.3: Connector pin assignment J3