Type 8703

6 | 10

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4.

Device/Process connections

4.1. Analogue version

Note:

• Optionally pin 7 and pin 8 with bus version as transmitter input possible.

• The cable length for RS232/actual value signal is limited to 30 m.

Plug D-Sub, 15 pin

Pin Assignment

Analogue control unit

1

9

6

5

1

Binary input (related to GND Pin2)

2

GND

3

Power supply + 24 V DC

4

Relay, normally opened

5

Relay, normally closed

6

TX+ (RS485-Y) – bridge with pin 9 at half duplex

7

TX- (RS485-Z) – bridge with pin 8 at half duplex

8

RX- (RS485-B)

9

RX+ (RS485-A)

1.) RS232 interface only to be operated via RS232 adapter with integrated level adjustment

5.

Performance specifications

5.1. Pressure loss diagram of MFMs

The diagram shows exemplary the pressure loss characteristics when air flowing through. To determine the pressure loss of another

gas, it must first be converted to the corresponding air flow.

0

10

20

30

40

50

60

70

80

90

100

110

120

G1/4

Sub-base

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

Ql

N/min]