Connection diagram for the transmitter (“HART”)
3
28
20
21
23
24
25
26
27
1
2
22
+
-
+
-
+
-
+
-
1
2
3
28
20
21
22
23
24
25
26
27
Supply cable
Ground terminal for
protective conductor
Ground terminal for
signal cable shield
Signal cable
ba009y35
Fuse
• Power supply 20...55 V AC / 16...62 V DC:
2.5 A slow-blow / 250 V; 5.2 × 20 mm
• Power supply 85...260 V AC:
1 A slow-blow / 250 V; 5.2 × 20 mm
Ground connection (protective earth)
L1
for AC power supply
L+
for DC power supply
NL–
Pulse/frequency output (active/passive): f
max
= 10 kHz
active: 24 V DC, 25 mA (max. 250 mA/20 ms)
passive: 30 V DC, 250 mA
Alarm output (Relay 1): can be configured
max. 60 V AC / 0.5 A AC; max. 30 V DC / 0.1 A DC
Current output (active):
0/4...20 mA, R
L
< 700 Ω (with HART: R
L
≥ 250 Ω)
Ground connection (screening of signal cable)
The input and outputs are galvanically isolated from the power supply and
from each other.
Version with a “HART” communication module
Status output (Relay 2): can be configured
max. 60 V AC / 0.5 A AC; max. 30 V DC / 0.1 A DC
Fig. 22
Terminal compartment
Promag 33 (HART)
Promag 33 4 Electrical Connection
Endress+Hauser 23
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