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MODULATING
SINGLE
LIMIT
2
ML7984
SOURCE
6
B
R
W
B
R
R
W
W
2
ML7984
B
B
R
R
W
W
ML7984
2
B
B
R
R
W
W
FUNCTION
DIP SWITCH CONFIGURATION
1001
MECHANICAL SERIES 90
DIRECT ACTING
1
2
1011
MECHANICAL SERIES 90
REVERSE ACTING
1
2
POWER SUPPLY PROVIDES OVERLOAD PROTECTION AND
1
DISCONNECT MEANS.
2
ALLOW UP TO 0.5 AMPS FOR EACH DEVICE. ACTUATORS AND
CONTROLLER CAN SHARE SAME TRANSFORMER PROVIDING THE
VA RATING OF THE TRANSFORMER IS NOT EXCEEDED AND PROPER
PHASING IS OBSERVED. DO NOT MIX A.C. AND D.C. POWER SOURCES.
3
DO NOT MIX M984/6 OR MODUTROL MOTORS WITH THE ML7984 IN
THE SAME CIRCUITRY.
4
USE CONFIGURATION DIP SWITCHES TO SELECT DEVICE FUNCTIONS:
DIRECT ACTING FUNCTION (ACTUATOR STEM MOVES UPWARDS WITH
SIGNAL INCREASE) OR REVERSE ACTING FUNCTION (ACTUATOR
STEM MOVES DOWNWARDS WITH SIGNAL INCREASE).
5
TURN POWER OFF BEFORE SETTING ANY DIP SWITCHES. FOR
COMMON TRANSFORMER AND COMMON CONTROLLER APPLICATION,
PLEASE CONSULT THE FACTORY.
6
MAXIMUM RESISTANCE PER CONTROL CIRCUIT OF 280 OHM.
Fig. 13. ML7984 Wiring with Common Transformer,
Individual Controllers.
ML6984, ML7984 SERIES 4000 DIRECT COUPLED VALVE ACTUATORS
3
T6
T5
3
L1
T6
24 VAC
L2
T5
OR
3
T6
28 VDC
T5
T6
T5
ON (1)
4
OFF (0)
3
4
ON (1)
5
OFF (0)
3
4
M25497A
7
ML7984
2
B
R
W
SINGLE
ML7984
2
SOURCE
B
B
R
R
4
W
W
ML7984
2
B
R
W
RESISTOR SELECTION CHART
NO. OF
RESISTOR
ACTUATORS
VALUE
1
RESISTOR NOT REQ'D.
2
133 OHM
3
68.1 OHM
4
45.3 OHM
POWER SUPPLY PROVIDES OVERLOAD PROTECTION AND
1
DISCONNECT MEANS.
2
ALLOW UP TO 0.5 AMPS FOR EACH DEVICE. ACTUATORS AND
CONTROLLER CAN SHARE SAME TRANSFORMER PROVIDING THE
VA RATING OF THE TRANSFORMER IS NOT EXCEEDED AND PROPER
PHASING IS OBSERVED. DO NOT MIX A.C. AND D.C. POWER SOURCES.
3
DO NOT MIX M984/6 OR MODUTROL MOTORS WITH THE ML7984 IN
THE SAME CIRCUITRY.
4
USE RESISTOR KIT PART NUMBER 272822.
Fig. 14. ML7984 with Individual Transformers, Common
Controller.
3
1
T6
L1
24 VAC
L2
T5
OR
2
T6
3
28 VDC
T5
1
T6
L1
24 VAC
L2
T5
2
OR
T6
3
28 VDC
T5
1
T6
L1
24 VAC
L2
T5
OR
2
T6
28 VDC
T5
4
ALL RESISTORS
1/4 WATT
1% METAL FILM
M25498A
95C-10939—11
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