HF127PEN_EL_TA_v0501_04
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Terminal 12-14; Flowmeter input B
:
Exactly as described for the flowmeter A, three basic types of flowmeter signals can be connected
for flowmeter input B. Please refer to the descriptions per flowmeter type as describer for flowmeter
A. The 9-10-11 do correspond with the terminals 12-13-14.
Terminal 17-19; Temperature inputs TA - (0)4-20mA:
The F127-A-EG-TA requires for both temperature measurements A and B a (0)4-20mA sensor
signal which will be processed 4 times a second with a 14 bits accuracy. The input is not isolated.
The temperature of the inlet flow will be measured with sensor A - terminal 18.
The temperature of the outlet flow will be measured with sensor B - terminal 19.
Option - communication/printer RS232/RS485:
see the manufacturer's plate.
Full serial communications and computer control in accordance with RS232 (length of cable
max. 15 meters) or RS485 (length of cable max. 1200 meters) is possible.
Read the Modbus communication protocol and Appendix C.
Fig. 10: Overview terminal connectors communication option.
When using the RS232 communication option, terminal 27 is used for supplying the interface.
Please connect the DTR (or the RTS) signal of the interface to this terminal and set it active (+12V).
If no active signal is available it is possible to connect a separte supply between terminals 26
and 27 with a voltage between 8V and 24V.
26
27
29
RS485 - 2-wire
28
A
B
+
30
31
Y
26
27
Z
29
RS485 - 4-wire
28
A
B
+
26
27
29
RS232
28
RXD
TXD
30
31
30
31
DTR
+12V
