Simex SRP-457, Руководство пользователя

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User manual - METER SRP-457
recommended. Twisted pair (best if shielded) must be used with RS-485 serial
transmission connections.
–
In the case of measurement or control signals are longer than 30m or go outside of the
building then additional safety circuits are required.
–
In the case of interference from the power supply side the use of appropriate interference
filters is recommended. Bear in mind that the connection between the filter and the unit
should be as short as possible and the metal housing of the filter must be connected to
the earth with the largest possible surface. The cables connected to the filter output must
not be run with cables with interference (e.g. circuits controlling relays or contactors).
Connection of the power supply, and the measurement and controlling signals should be
made by screw connectors mounted inside the housing.
Figure 4.3. Method of cable insulation replacing and cable terminals
Figure 4.4. Terminals description (relay outputs)
9
1 2 5 6 7 8 9
GND DATA+
DATA-
RS - 485
3 4
+24V ±5%
I
max = 100mA
10 11 12 13 14 15 16
n.c.
GND
0-20mA
4-20mA
n.c.
+
GND
0/1 - 5V, 0/2 - 10V
+
R1
(optional)
-
Uo
+
Power
supply
(depending on version)
6-7 mm
m
a
x.
2
m
m