2.3
Transmitter wiring
Warning!
•
Make electrical connections with the power supply switched off!
•
The PE terminal strip must be grounded externally (contact protection)!
•
When wiring up probes and sensors in explosion hazardous areas, observe the
instructions on the certificate and other local regulations.
Terminal strip
The terminal strip for cable diameters up to 2.5 mm
2
is located in a separate connection
compartment. Fig. 2.5 shows the wiring diagram for the Prolevel FMC 661 (Terminal 3 is
reserved for the internal protective ground):
•
Remove the plastic cover from the front of the connection compartment
•
Press out the pre-stamped cable entries as required
bottom: 5 x Pg 16, 4 x Pg 13.5; rear: 4 x Pg 16.
Power
The power requirements are printed on the nameplate at the right-hand side of the
nameplate, see also Section 1.5, "Technical Data".
•
If the specifications on the nameplate do not correspond to those of your
power supply, do not connect up - you may damage the instrument!
•
Connect the protective ground to the metallic terminal strip provided at the left
— this ensures safe isolation and contact protection.
•
Current output, relay outputs, power connection and sensor input are all
electrically isolated from one another.
Analogue outputs
Only one non-floating device can be connected to the current output.
•
There is no limit to the number of floating devices, other than that imposed by
considerations of the maximum load of 600
Ω
.
Relays
For the switching capacity of the relays see the technical data in Section 1.5.
•
Relays 1a and 1b are normally assigned to channel 1
•
Relays 2a and 2b are normally assigned to channel 2.
The assignment can be changed by software, see Section 4.4.
RS-485
[EEx ia] IIC
B DGND A
L+ L-
L1 N
L+
L-
16.
..
60 VD
C
85.
..
253 V
A
C
20.
..
55 V
A
C
L1
N
PE
0/
4.
..
20 m
A
Sensor
1
Sensor
2
Rx
D/
Tx
D-
P
Rx
D/
Tx
D-
N
DGND
R
S
-485
1 2 3
4 5
81 82
91 92
31
11
21
41
1b
1a
2a
2b
51
61
32
12
22
42
52
62
33
13
23
43
53 60
- + - +
BA142_13
current 1
rel
a
ys channel
1
rel
a
ys channel
2
al
ar
m
rel
a
y
P
E
te
rm
in
a
l s
tri
p
g
round e
x
ter
nal
ly
opt
ional
i
n
terf
ace
le
v
e
l sensor
limi
t s
w
it
c
h
Com
m
ul
og V
U
260Z
b
u
s s
w
it
ches
Fig. 2.5:
Terminal assignments for
Prolevel FMC 661
Warning!
Prolevel FMC 661
Chapter 2: Installation
Hauser
15
Summary of Contents for prolevel FMC 661
Page 2: ......
Page 4: ......
Page 6: ...Table of Contents Prolevel FMC 661 2 Endress Hauser...
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