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 wiringFig. 2.4 is a pin assignment diagram for the Silometer FMC 671 Z/676 Z.
• Terminals z 30, b 14, d 14 and b 10 are connected internally
• Inputs d2, d4 and z2, z4 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 1 and 22 in the rack connector ensure that Silometer
FMC 671 Z/676 Z transmitters only can be inserted at these points. The pins must
be inserted if the rack is not custom built by Endress+Hauser.
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
2
1
+
-
EC 17 Z
z2
z4
2
1
+
-
z2
z4
L
L+
20 V...30 V
z30
d32
d2
d4
+
d10
b10
+
+
d12
d14
0/4...20 mA
+
+
b12
b14
0/2...10 V
z18
d20
z20
z22
d24
z24
r
u
a
r
u
a
r
z26
d28
z28
u
a
+
+ +
14
16
32
EL 17 Z/EM 17 Z
z2
z4
EC 16 Z
2
1
ZA 67...
22
24
26
28
30
+
-
+
-
10
12
r
u a
18
20
r
u a
r
u a
L-
L+
Analogue
outputs
Relay
➀
Power supply
Relay
➁
Level,
volumen
Relay
➀
Relay
➁
BA063D11
Alarm relay
Non-Ex-area
Input
level
measurement
DC supply
Ex-area
Remote dialog
Deltapilot S
Current
➀
Voltage
➀
Rackbus
Capacitance/
Multicap probe
Capacitance/
Multicap probe
Multicap
Capacitance/
Multicap probe
Liquiphant or
Soliphant
Input
limit level
switching
FMC
671 Z
676 Z
Alarm relay
Fig. 2.4:
Pin assignment diagram for
Silometer FMC 671 Z/676 Z
Silometer FMC 671 Z/676 Z Chapter 2: Installation
13
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