E115-P
User Manual
FW_E115-P_M_v0301-01_EN
Page 51
C1
C3
C4
Black
GND
Common system ground
Data (+)
+5V DC
C2
Green
U
S
B
White
Red
Data (-)
MEM
Fig. 37:
Terminals C1-C4: Communication
When using the RS232 communication option, terminal C2 must be used for supplying the interface.
Please connect the DTR (or the RTS) signal of the interface to this terminal and set it active (current
l12V). If no active signal is available it is possible to connect a separate supply between
terminals C1 and C2 with a voltage between 6V and 10V.
6.4.13 TERMINALS A1-A2: ISOLATED ANALOG OUTPUT – TYPE AH
The flowrate proportional output (AH) is standard available. This output is an isolated 4-20 mA
output with the possibility to power the device via the 4-20 mA loop. It is non-polarity sensitive.
When the output is disabled, the current is by default limited to 2 mA. Max. driving capacity
1000 Ohm @ 27 VDC. If only powered by the loop, the backlight will not be activated.
The total loop resistance may not exceed 1000 Ohm and may not be less than 330 Ohm (at 30 mA).
This means that the total resistance of other loop-devices may not exceed 670 Ohm.
A1
A2
+
10-27V DC
mA
mA
MEM
Fig. 38:
Terminals A1-A2: Analog output
