Spirax Sarco RIM10 Series, Инструкция по установке и обслуживанию, Страница: 26 / 92

IM-P198-02 MI Issue 5 26
4.2.3 External 4-20 mA current loop output
Three output channels are available for connection. These are 2-wire current loop
connections. The positive side is connected to the 24 Vdc supply at pin 7. The negative
side is connected to the 4-20 mA receiver input terminal. The receiver should have the
common or ground terminal connected to the power supply ground as shown in Figure 22.
In the diagram, channel 1 is used as an example with terminal numbers 13 (positive) and
1 (negative). The terminal numbers will change for channels 2 and 3 as listed in Figure 24.
4.2.4 4-20 mA current loop input
Three channels are available.4-20 mA inputs cannot be used to power the loop interface.
For the inputs, the transmitter output is tied to the positive terminal, and the negative
terminal is connected at the flowmeter to the supply ground. The transmitter should be
powered from an external supply, or can be wired to the 24 V at the flowmeter as shown in
Figure 23. The diagram illustrates channel 1 as an example, with terminal numbers 16
(positive side) and 4 (negative side). On channels 2 and 3 the terminal numbers will be
different as listed on the summary wiring diagram found at the beginning of this Section -
Figure 19.
Fig. 22
Fig. 23
RIM10 terminal
4-20 mA
receiver
Out -
Out +
24 V
GND
1
13
7
8
RIM10 terminal
4-20 mA
transmitter
In +
In -
24 V
GND
16
4
7
8
4-20 mA current loop outlet