Terminal Connections; Wiring Input - M-system M3-UNIT Series Operating Manual

8.4 TERMINAL CONNECTIONs

8.4.1 WIRING INPUT

Connect a 2-wire transmitter.
OUTPUT VOLTAGE
24 – 28 V DC with no load
19 V DC minimum at 20 mA
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.
2-WIRE
TRANSMITTER
+ +
– –
+
MONITOR
V
–
(1 – 5 V DC)
CONFIGURATOR
When Used as Isolator
No Connection
No Connection
+
INPUT
–
CURRENT RATING
≤ 22 mA DC
+
1 7
OUTPUT
2 8 –
+
3 11
POWER
4 12 –
JACK
1
2
250 Ω
4
3
24.9 Ω
SHORTCIRCUIT PROTECTION
CURRENT LIMITED
35 mA max.
M3LDY OPERATING MANUAL EM-2664-B Rev.0
PROTECTED TIME DURATION
No limit
21