ATI Technologies d12 series - Current Loop Receiver, Single Supply (2-Wire Mode); Figure 12. Current Loop, Single Supply (2-Wire Mode)

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor
Revision N (7/15) 17
Current Loop Receiver, Single Supply (2-Wire Mode)
The transmitter will source current to a loop receiver in 2-wire mode, as shown. A single power supply
provides loop power, which is sufficient to power the transmitter, but without relays, LCD backlighting,
and RS232/RS485 communications. Size each power supply according to the number of transmitters,
the loop powered current demand of each (see specifications), and the wire resistance. The wire
resistance must not be allowed to drop the Loop Supply Voltage below 12V at the terminals of any
transmitter.
Figure 12. Current Loop Receiver, Single Supply (2-Wire Mode)
+
Loop Supply Voltage
(12v Minimum)
-
Multichannel Current
Loop Receiver with
Integral 24V Supply
(Channels are
typically not isolated
from supply)
-
+
0.0
-
+
24
Sig
TB1
-
+
0.0
S
ig
TB1