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PRESYS
| Instruments
2.3.3 - Milliampere Input
A standard 4 to 20mA current source can be applied between terminals 1(+) and
3(-) in the case of input 1, and between terminals 4(+) and 6(-) in the case of input 2;
such current can originate from an externally powered Transmitter. In the event that the
internal controller 24V voltage source is used to power a 2-wire Transmitter the current is
received only on terminal 1(+) in the case of input 1 and received only on terminal 4(+) in
the case of input 2. Figure 6 illustrates those two connection possibilities.
Note 1: Keep shielded wire disconnected at this end.
Note 2: Connect shielded wire to transmitter ground terminal. If ground terminal non-existent keep shielded wire disconnected at this end.
Two-wire Transmitter
4-wire Transmitter
Fig. 6 - Current source Connection
DCY-2050 and DCY-2051
(Transmitter should not
be grounded)
Ungrounded Transmitter
Installation
Page 11
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