2.3
Transmitter wiring
Warning!
•
Make electrical connections with the power supply switched off!
•
When wiring up probes and sensors in explosion hazardous areas, observe the
instructions on the certificate and other appropriate regulations.
Rack wiring
Fig. 2.4 is a pin assignment diagram for the Silometer FMX 570.
•
Terminals z 30, b 14 and d 14 are connected internally
•
Inputs d2, d4 are electrically isolated from the circuit and each other.
•
The circuit zero of the unit (
⊥
) is connected to the negative terminal of the
supply voltage.
Note!
•
Two indexing pins, at positions 2 and 9 in the rack connector ensure that Silometer
FMX 570 transmitters only can be inserted at these points. The pins must be
inserted if the rack is not custom built by Hauser.
Analogue outputs
The negative terminal of the current output, of the voltage output and of the supply voltage
are connected to the circuit zero of the Silometer FMX 570 module.
•
Any number of measurement and control units can be connected in parallel to
the voltage output, provided that all potentials are related to negative terminal
of the 24 V supply (R
L
≥
10 kOhm).
-
There is no limit to the number of floating devices, apart from that imposed
by considerations of maximum or minimum load.
•
Only one non-floating device can be connected to each of the current
outputs.
d b z
+
2
4
6
8
2
1
+
-
EC 47 Z
d2
d4
3
2
+
-
FEB 17 (P)
d2
d4
2
1
+
-
EC 37 Z
d2
d4
L
L+
20 V...30 V
z30
d32
+
+
d12
d14
0/4...20 mA
+
+
b12
b14
0/2...10 V
r
z26
d28
z28
u
a
10
12 + +
14
16
32 L+
18
20
22
24
26 r
28 u a
30 -L
Analogue
outputs
Alarm relay
Power supply
Level,
volume
BA119Y11
Alarm relay
FMX 570
Non-Ex- area
Input
DC supply
Deltapilot S
Ex-area
Current
Voltage
Capacitance/
Multicap probe
Capacitance/
Multicap probe
Input
Fig. 2.4:
Pin assignment diagram for
Silometer FMX 570
Chapter 2: Installation
Silometer FMX 570
11
