User Manual
E115-P
Page 50
FW_E115-P_M_v0301-01_EN
6.4.11 TERMINALS E1-E2: EXTERNAL RESET WITH CLEAR-LOCK - TYPE IB
Use this function to reset the total to zero with an external switch (pushbutton). The total resets the
moment a falling edge is detected (the moment the switch closes).
To disable the ”Clear Total”-function of the optical keys, keep this input closed.
Make sure the contact resistance of the switch is less than 0.8 V@2uA = 400 kOhm. A reset pulse
should last for at least 100 ms. The input must be switched with a normally open contact to GND.
R
3V
E1
┴
E2
Common system ground
MEM
Fig. 36:
Terminals E1-E2: External reset
6.4.12 TERMINALS C1-C4: COMMUNICATION RS232/RS485/USB - TYPE CB/CH/CU
● Serial communications are possible on hardware layers RS232 (length of cable max. 5 meters),
RS485 (length of cable max. 1200 meters) and USB (length of cable max. 5 meters). To achieve
reliable communication, make sure the hardware layer specific requirements are met.
● Read
Section C: Modbus communication [»60]
.
C1
C3
C4
GND
GND
Common system ground
TxD
< 12V DC
C2
RxD
DTR
RTS
TxD
RxD
R
S
2
3
2
MEM
C1
C2
C3
C4
B
A
A
B
GND
GND
Common system ground
R
MEM
S
4
8
5
