Advantage Controls MegaTronMT Manual page 7

4-20mA Output Card Wiring
For isolated 4-20mA outputs an external power source for the loop must be supplied. JP4 and JP5 on the
board must be jumpered for isolated with an external power source supplied to the external VDC input. The
external power source must not exceed 24 volts DC.
For non-isolated 4-20mA outputs the controller will supply the power for the loop. JP4 and JP5 must be
jumpered for non-isolated and no connections are made to the external VDC points.
Note: If multiple outputs are being connected to a single energy management system the negatives or commons
MUST remain isolated from each other.
4-20mA Input Card Wiring
The 4-20mA input card requires that the external device sending the 4-20mA input signal(s) supply the power
for the loop. The external power source must not exceed 24 volts DC.
Outputs
External
VDC Input
Connections
04-
J5
04+
03-
mA
03+
02-
1-4
02+
01-
J4
01+
VEXT-
VEXT+
V-
J8
V-
DC
V-
Voltage
V+
V+
V+
IN4-
J6
IN4+
IN3-
mA
IN3+
Inputs
IN2-
1-4
IN2+
IN1-
IN1+
LED
mA Outputs are supplied
as non-isolated as shown.
For isolated outputs
J4 and J5 jumpers
must be configured
as shown to here.
If J4 and J5 are set for isolated an
external DC voltage must be
connected to power the mA
outputs.
If J8 & J6 and set for isolated as
shown istead of the standard non-
isolated the external VDC will be
applied to the other V- and V+
connection points instead of
the controller's internal 12 VDC
on the V+ and ground on the
V- connections.
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