Johnson Controls M9220-GG-3 Series, Installation Manual, Page: 11 / 16

M9220-GGx-3 Proportional Electric Spring Return Actuators Installation Guide
11
Tandem Operation: GGx Master with
GGx
subordinates
The tandem configuration (Figure 14 and Figure 16)
provides twice (with two actuators) or triple (with three
actuators) the running and spring return torque of a
single actuator, or 354 lb·in (40 N·m), 531 lb·in
(60 N·m). The actuators may be mounted in tandem
using the M9000-158 Tandem Mounting Kit. To mount
a third actuator, user-configured bracketing is required.
Follow these guidelines for tandem operation:
• Two or three M9220-GGx-3 actuators may be
operated in tandem on the same shaft. If mounting
two actuators, see Figure 14; for three actuators,
see Figure 16.
• Each actuator requires separate 24 volt power.
When two or more actuators connected in tandem
share a common power source, the total maximum
power draw is actually 1.5 times the normal
running current for each actuator.
(Total Power = Number of Actuators x Running
Power x 1.5).
• Only one of the actuators can be configured as the
master. Set the selector switch to the master
position (Figure 15).
• The other GGx actuator(s) must be configured as
subordinate(s), by setting the tandem selector
switch to the subordinate position.
• The master can accept DC 0-10 V or DC 2-10 V, or
4-20 mA command signals based on the master’s
switch settings and/or external resistor.
• The master and subordinate(s) must have
matching RA/DA settings.
Figure 14: Tandem Connection
FIG:tandem1
Master
(M9220GGx actuator)
DC 0(2)...10V Control with Tandem Connection
Subordinate
(M9220GGx actuator only)
Y
DC 0(2)...10 V
+
U
+
1 2
3 4
BLK RED GRY ORN
AC/DC
24 v
~
(+)
DC 0(2)...10 V
COM
+
1
2
3 4
BLK RED GRY ORN
Figure 15: Tandem Selector Switch
select
NORMAL SUBORDINATE
MASTER
SUBORDINATE NORMAL
MASTER
Side A of Actuator
Side B of Actuator
Figure 16: Tandem Connection with Three Actuators
FIG:tand2
Y
DC 0(2)...10 V
+
Master
(M9220GGx actuator)
U
+
1 2 3 4
BLK RED GRY ORN
DC 0(2)...10V Control with Multiple Subordinates
Subordinate
(M9220GGx actuator only)
AC/DC
24 V
~
(+)
DC 0(2)...10 V
COM
+
1 2 3 4
BLK RED GRY ORN
Subordinate
(M9220GGx actuator only)
+
1 2 3 4
BLK RED GRY ORN