Fluidwell F126-P-EG-IA-TP, Руководство пользователя, Страница: 32 / 52

HF126PEN_EG_IA_TP_v0501_04
Page 32
Terminal 20-22; Temperature input TP - PT100:
Two types of PT100 elements can be connected to the F126-P-EG-IA-TP: 2 or 3-wire.
Terminal 26-31: type CB / CH / CI / CT - communication RS232 / RS485 / TTL (option)
 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 separate supply between terminals 26
and 27 with a voltage between 8V and 24V.
Terminal 26-31: backlight - type ZB (option):
Note: if the unit is supplied with a power supply type PD, PF or PM, the backlight supply is
integrated, so the text following is not applicable.
To power the backlight, provide a 12-24V DC to terminal 26 (-) and 27 (+). An external trimmer
1kOhm trimmer can be used to tune the brightness of the backlight, or if not desired, a short-cut
between these terminals have to be made which will result in the maximum brightness.
Note: Intrinsically Safe as well as 4-wire RS485 communication is not possible in
combination with type ZB, except if a PD, PF or PM power supply is being used.
Fig. 11: Overview terminal connectors backlight option.
30 31 26 27
Power suppply
12-24V DC 10% +
Option type ZB: adjustable backlight
+
+
+
1kOhm trimmer connection
or short-cut
GND
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
22 20
PT100 INPUT - 3 WIRE
+
21 22 20
PT100 INPUT - 2 WIRE
+
21