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M3LDY OPERATING MANUAL EM-2664-B Rev.0
8.4 TERMINAL CONNECTIONs
8.4.1 WIRING INPUT
Connect a 2-wire transmitter.
OUTPUT VOLTAGE
CURRENT RATING
SHORTCIRCUIT PROTECTION
CURRENT LIMITED
PROTECTED TIME DURATION
24 – 28 V DC with no load
19 V DC minimum at 20 mA
≤ 22 mA DC
35 mA max.
No limit
Input
+
–
2-wire transmitter
Monitor
1 – 5 V DC
+
–
Calculate supply power to a 2-wire transmitter using minimum voltage 19 V DC at 20 mA DC load. The voltage after
deducting voltage drop by connected reception resistance and leadwire resistance from 19 V DC will be supply power to
the 2-wire transmitter.
+
–
+
–
4
CONFIGURATOR
JACK
7
8
11
12
OUTPUT
POWER
+
–
1
3
2
2-WIRE
TRANSMITTER
+
–
V
–
+
(1 – 5 V DC)
MONITOR
■
When Used as Isolator
250 Ω
No Connection
No Connection
2
1
24.9 Ω
+
–
INPUT
4
3