Solidyne HOA-5 User manual

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -1
HOA-5 and HOA-9 are 4 and 8 channel Universal Output Override
Modules. They allow for up to 4 or 8 digital (relay) outputs and one
analog output(0-10VDC) to be controlled manually(on or off , by the
user) or automatically(by the Controller). The selection, made via a 3
position dual pole toggle switch, will allow the digital or analog output
to be set one of three states, “ AUTO - OFF - ON(Hand)”. Both
Modules have a voltage output feedback for The Controller to detect the
number of active HOA switches.
FEATURES:
•Hand, Off, Auto Module allows for loads to be controlled either
manually or by the IZAC Controller.
•The 0-10VDC Analog Channel's three position toggle switch can
be set to: Automatic(Controller operated), 0 volts (open), or any
desirable 0-10VDC adjustable voltage output. An on-board 0-
10VDC adjustable analog output source allows for manual
selection of a 0-10VDC signal, via a built-in adjust potentiometer,
on the analog override output.
•Using Transient Absorbers (transorbs) located between each output
and ground terminal, each output is designed to protect Controller
from high voltage(40VAC) transients and voltage spikes that can
propagate through load connections. HOA Modules are designed to
protect Controllers from surges or back voltages propagating
through inductive load connections.
•Each output is fuse protected from over-current via solid state reset-
able 3 Amps fuses.
•Power to the module and each output channel has a high intensity
Light Emitting Diode(LED) status indicator. The output LEDs are
ON when the output is energized Automatically or if they are
manually overridden ON.
•While HOA-4, HOA-8 Modules are designed to fit nicely together
with IZAC-4 and IZAC-8 Controllers, these modules are not
restricted to these controllers and can be used with other controllers
that require these override features.
•The overridden channels generate unique voltage output that can be
read by the Analog Input of the Controller to detect the number of
active override channels.
•Can control 4 or 8 channels of Digital ( Relay ) Outputs and one 0-
to-10 VDC Analog Output for a total of 5 or 9 channels of override
capability.
•Removable terminal blocks and modular design allows for easy
installation and operation.
APPLICATIONS:
•Manual control of loads for service operations.
•Manual 0-10VDC output adjustment can be used to test or adjust 0-
10VDC devices.
•Switch voltage feedback can allow for the Controller to detect
when the unit is in service or perform other program related
operations.
•Internal electrical protection makes the device useful in suppressing
harmful voltages in electrically noisy environments.
HAND
O FF
AUTO
5 and 9 Channel
Universal Override
Modules
AU
24VAC
GRD
+12VDC ANA
ANA FEED
OUT 8 OUT 8 OUT 7 OUT 6 OUT 5 OUT 4 OUT 3 OUT 2 OUT 1 24VAC 24VAC 24VAC
NC/O COM NO NO NO NO NO NO NO INT EXT EXT
PO
OUT 8 OUT 8 OUT 7 OUT 6 OUT 5 OUT 4 OUT 3 OUT 2
OUT 1 24VAC 24VAC 24VAC
MA
NU
MA
NU
A
U
24VA
+12VDC ANA
NA OUT 4 OUT 3 OUT 2
OUT 1 24VAC 24VAC 24VAC
PO
NA OUT 4 OUT 3 OUT 2
OUT 1 24VAC 24VAC 24VAC
Model:
HOA-5
HOA-9

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -2
GENERAL :
HOA-5 and -9 electronic modules allow the installer or the operator to
selectively change the state of up to 4 (HOA-5) or 8 (HOA-9) Digital
Outputs and one Analog Output to operate Automatically, Overridden to
be ON all the time or Overridden to be OFF.
Besides these capabilities, each of the outputs and the 24 VAC power
input are protected from high current draw (up to 3 Amps) by means of
solid state reset-able fuses. Transorbs (fast response Varistors) provide
additional protection from high voltage surges, electrical noise, spikes
and transients.
These modules also have one built-in Analog Output Override channel.
The Analog Output generated by a controller can be overridden by an
adjustable 0-10 VDC output source, supplied by the HOA Module.
Toggling the Analog Output switch to ON will allow the user to adjust
the output to any desired 0-10 VDC signal, via a built-in potentiometer.
If the switch is selected as OFF, no voltage will be produced at the
output. Returning the switch to the AUTO position will put the
Controller back inline with the Analog Output.
When a digital output is overridden, each overridden output will send an
analog voltage to the 0-10 VDC override output feedback terminal. This
voltage can be read by the Controller to detect the number of HOA-9
outputs being overridden or which outputs are overridden, for the
HOA-5. This allows for remote detection and alarm capability if any of
the Digital Outputs are in a state other than Automatic mode of
operation.
Solid state thermal fuses located on each output go into high resistance
state due to thermal heating and protects the Digital Outputs from
damage due to over current passing through them.
Each output and 24 VAC Input further has a voltage Transient
suppressors that they clip any voltage spikes over 40 volts of peak
amplitude. These protections are critical for reliable operation of any
microprocessor based controller that is driving the outputs. By clipping
high voltage and frequency transients and spikes, the effect of these
electrical noise signals are reduced drastically and much safer and
cleaner operation can result.
Note : Most all inductive loads, such as contactors, relays, motors,
solenoids and loads alike, when they are switched on and especially
switched off, can generate a very sharp voltage spikes, eventually
producing damaging arcing at a high frequency (due to rate of change
of voltage).
Electrical noise can travel over the 24 VAC power line and/or through
the air as RF signals and can couple on to foils of PC boards causing
damage or malfunctions.
Once they travel, they try to find the minimum resistive path to earth
ground. During this event, the noise may disturb the balance of the low
voltage microprocessor circuitry and cause damage or noise to be
processed as data, resulting in unexpected operation. Often, this type
instability in the processor will cause data to become corrupt and the
processor to lock up in a state that where it can not get out.
Hence, all information and data processing can stop, outputs and inputs
may freeze at undesirable states until the problem is corrected.
SPECIFICATIONS :
Electrical :
a. Number of Digital Output Channels : 4 (HOA-5)
8 (HOA-9)
b. Number of Analog 0-10 VDC Channels: 1 (Both HOA-5,-9)
c. Digital Output Select: AUTO (Controlled by a controller)
OFF (No voltage, open)
ON ( Typically applied 24 VAC )
d. Analog Output Select : AUTO (0-10 VDC from controller)
OFF (No voltage, open)
ON (User adjusted 0-10VDC)
e. Digital Output Protection: Resettable 3 Amp
Solid State Fuse
f. Digital Output and Power Input Transient protection:
Transorb protection,
Min. voltage 64.5 V peak,
Peak pulse power : 600 Watts,
Steady state : 2.5Watts
Response time : 5 nanoseconds
g. Override Output Signal : 0-10 VDC
HOA-5:10VDC÷16 combinations; 0.625 V per bit
HOA-9:10VDC÷8 =1.25 V per Overridden output
Input Voltage : 24 VAC ±10%
Power Consumption : 0.5 VA
External DC Power supply : Unregulated 12 to 18 VDC
Analog Output Drive capacity : 10 KΩload at 10 VDC
Analog Feedback Output capacity : 10 KΩload at 10 VDC
Override Switches : 2 pole 3 throw , 3 Amps @ 24 VAC
Input and Digital Output Terminals :12 Terminals, 3 dedicated to
24 VAC Power Inputs
Analog Input and Feed back Terminals : 5 Terminals
The HOA-5 module switch combinations will produce the following
voltages on the Feedback Output:
Any one output is overridden: 1 VDC
Any 2 outputs are overridden: 2 VDC
Any 3 outputs are overridden: 3 VDC
All 4 outputs are overridden: 4 VDC
The HOA-9 module switch combinations will produce the following
voltages on the Feedback Output:
Any one output is overridden: 1 V DC
Any 2 outputs are overridden: 2 V DC
Any 3 outputs are overridden: 3 V DC
Any 4 outputs are overridden: 4 V DC
Any 5 outputs are overridden: 5 V DC
Any 6 outputs are overridden: 6 V DC
Any 7 outputs are overridden: 7 V DC
All 8 outputs are overridden: 8 V DC
--------See fig. 1----------

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights 1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -3
Mechanical :
Each Board is 4.00” wide X 2.350” long X 1.000” high
----------See figure 3------------
Environmental :
Operation Temp range : 10 to 140 °F
Storage : -10 to 160 °F
Operation Humidity : 0 - 95% RH non-condensing
Storage Humidity : 0 - 100% RH non-condensing
INSTALLATION AND WIRING :
The HOA-5 and -9 should be mounted indoors, if possible. If the
units must be mounted outside, make certain they are installed
inside a well protected Electrical Enclosure that is free from
moisture and contact with the elements.
If it the HOA-5 is to be used with the IZAC-4 Controller or the
HOA-9 with the IZAC-8 Controller, the best way to install them is
as follows:
1. First, mount the plastic tracks for both the Controller and HOA
horizontally, so that the tracks line up.
2. Place the Controller and HOA into the track and
insert one side of the one-piece connector into the
Controller output and slide the HOA's input over
the other side of the connector. The Controller's
output connections will be directly opposite the
HOA's inputs. 18 AWG wire can also be used to
connect the Controller output to the HOA input.
After the positioning the units close together over
the connector, tighten the terminal screws.
WIRING:
(See Figures 1 and 2 for references made to the pin
numbers)
HOA pins 1, 2, 3 are the 24VAC connections to the
Controller. HOA pins 20, 21, 22 connect through to
pins 1, 2, and 3, respectively. The connection from pin
1 to 20 provides a path for the External 24VAC HOT,
used by the Controller. The 24VAC supply transformer
is protected between pins 1 and 20 with a fuse and
transorb. Pin 2 connects to pin 21, providing the path
for the 24VAC Return(or neutral). The connection
between pins 3 and 22 is the path for the IZAC
Controller's 24VAC Internal HOT(or Input 24VAC
HOT), taken from another 24VAC source transformer
to drive the 24VAC loads.
Each output of the HOA-5 Module has a dedicated pair
of Output and Output Common terminals for each load
connection. The outputs of the HOA-9 Module have
only one Output Common, shared by all of the
individual load connections. Load connections from the
Controller to the HOA-5, and -9 are made through these
terminals for the respective Controller loads.
Pins 13 to 19 have the same designation for both the
HOA-5 and HOA-9. Pins 13 and 14 provide the
override feedback to the Controller. Pin 14 connects
to one of the controller's 0-10V sensor inputs, pin 13
connects to sensor common. The 0-10V output from
the Controller would connect to pin 15 on the HOA.
The Controller's 0-10V output would then be taken
from pin 16 on the HOA(the 0-10V common would
come directly from the Controller). Provide Pin 17 with
an unregulated +12- 18VDC, rated for 30mA. Pin 13 is
common for this output. Pin 18 connects to a good
earth-ground, and is critical for proper transient circuit
protection. Pin 19 is the 24VAC internal relay return.
FIGURE 1: HOA Mounting

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -4
24 VAC EXT
24 VAC EXT
24 VAC INT
24 VAC EXT
24 VAC EXT
24 VAC INT
OUTPUT 2
GROUND
24 VAC INT (RELAY
CONTACT)RETURN
0-10VDC ANALOG OUTPUT
FROM A CONTROLLER
0-10VDC OVERRIDE FEEDBACK
COMMON
FUSE
TRANSORB
AUTO
OFF
ON
+12 TO 18 VDC
0-10VDC ANALOG OUTPUT
TO ACTUATOR
AUTO
OFF
ON
1.0 VDC
OUTPUT-1
+ --
AUTO
OFF
ON
1.0 VDC
OUTPUT-8
+ --
INPUT 1 OUTPUT 1
FUSE
TRANSORB
AUTO
OFF
ON
SW - 1
LED 1
INPUT 8
OUTPUT 8
(N.O/N.C.)
ELECTRONIC
CIRCUITRY
0-10 VDC FEEDBACK OUTPUT
INPUT 4 OUTPUT 4
FUSE
TRANSORB
AUTO
OFF
ON
SW - 4
LED 4
INPUT 2
FUSE
TRANSORB
AUTO
OFF
ON
SW - 2
LED 2
INPUT 3 OUTPUT 3
FUSE
TRANSORB
AUTO
OFF
ON
SW - 3
LED 3
FIGURE 2: HOA-9 SCHEMATIC DIAGRAM
Outputs 2 through 7
SW - 9
ANALOG
OUTPUT
OVERRIDE
SWITCH
MANUAL ANALOG
OUTPUT SET
POTENTIOMETER
MANUAL
0-10 VDC ADJUST
INPUT 5 OUTPUT 5
FUSE
TRANSORB
AUTO
OFF
ON
SW - 5
LED 5
INPUT 6 OUTPUT 6
FUSE
TRANSORB
AUTO
OFF
ON
SW - 6
LED 6
INPUT 7 OUTPUT 7
FUSE
TRANSORB
AUTO
OFF
ON
SW - 7
LED 7
INPUT COMMON
OUTPUT
COMMON
FUSE
TRANSORB
AUTO
OFF
ON
SW - 8
LED 8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
32
SW - 9
SW - 8 SW - 1

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -5
24 VAC EXT
24 VAC RET
24 VAC INT
24 VAC EXT
24 VAC EXT
24 VAC INT
NO CONNECTION NO CONNECTION
INPUT 2
INPUT 2 COMMON
OUTPUT 2
OUTPUT 2 COMMON
FUSE
TRANSORB
AUTO
OFF
ON
INPUT 3
INPUT 3 COMMON
OUTPUT 3
OUTPUT 3 COMMON
FUSE
TRANSORB
AUTO
OFF
ON
INPUT 4
INPUT 4 COMMON
OUTPUT 4
OUTPUT 4 COMMON
FUSE
TRANSORB
AUTO
OFF
ON
INPUT 1
INPUT 1 COMMON
OUTPUT 1
OUTPUT 1 COMMON
FUSE
TRANSORB
AUTO
OFF
ON
GROUND
24 VAC INT (RELAY
CONTACT)RETURN
0-10VDC ANALOG OUTPUT
FROM A CONTROLLER
0-10VDC OVERRIDE FEEDBACK
COMMON
FUSE
TRANSORB
AUTO
OFF
ON
+12 TO 18 VDC
0-10VDC ANALOG OUTPUT
TO ACTUATOR
ELECTRONIC
CIRCUITRY
MANUAL 0-10 VDC ADJUST
SW - 4
SW - 3
SW - 2
SW - 1
0-10 VDC FEEDBACK OUTPUT
AUTO
OFF
ON
1.0 VDC
OUTPUT-1
+ --
AUTO
OFF
ON
1.0 VDC
OUTPUT-2
+ --
AUTO
OFF
ON
1.0 VDC
OUTPUT-3
+ --
AUTO
OFF
ON
1.0 VDC
OUTPUT-4
+ --
LED 1
LED 2
LED 3
LED 4
FIGURE 3: HOA-5 SCHEMATIC DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
SW - 1
SW - 4 SW - 3 SW - 2
SW - 5

DOCUMENT NO: ZL-HOA-4-8 REV. 0 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -6
Output-1 Load Relay
24 VAC HOT
24 VAC RET
OUTPUT -
COMMON
OUTPUT - 8
OUTPUT - 7
OUTPUT - 6
OUTPUT - 5
OUTPUT - 4
OUTPUT - 3
OUTPUT - 2
24 VAC INT
OUTPUT - 1
EXTERNAL
STEP DOWN
Transformer
24VAC Input
Voltage.
24 VAC
INPUT
N.C.
N.O.
24VAC
Coil Input
24 VAC INT
To Normally Open load
connection.
To Normally Closed load
connection.
J1 and J2 Jumper installed . With J2 in place
the load uses the same 24VAC that is supplying
power to the IZAC.
Pins 19 and 21 must be
connected for HOA LEDs to
turn on when power is sent to
the output.
O
O
O
O
O
O
O
J1
J2
JB1
1
JB2
1
2
3
4
5
6
7
8
J3
&
J4
XMT
RCV
C
C
R
J5
BATTERY
DU-1 CONNECTION
IZAC 8
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
POWER
ON
ON OFF AUTO
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
Output
Common
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN Com
FIGURE 4: HOA-9 Single transformer for load relays and IZAC

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights 

1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -7
FIGURE 5: HOA-9 individual IZAC and load relay transformers
Output-1 Load Relay
24 VAC HOT
24 VAC RET
OUTPUT -
COMMON
OUTPUT - 8
OUTPUT - 7
OUTPUT - 6
OUTPUT - 5
OUTPUT - 4
OUTPUT - 3
OUTPUT - 2
24 VAC INT
OUTPUT - 1
IZAC
24 VAC
INPUT
N.C.
N.O.
24VAC
Coil Input
24 VAC INT
To Normally Open load
connection.
To Normally Closed load
connection.
EXTERNAL
STEP DOWN
Transformer
24VAC Input
Voltage.
Second 24VAC for
load relays.
Load Relay
24 VAC
INPUT
J1
J2
JB1
JB2
1
2
3
4
5
6
7
8
J3
&
J4
XMT
RCV
C
C
R
J5
BATTERY
DU-1 CONNECTION
IZAC 8
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
POWER
ON
ON OFF AUTO
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
Output
Common
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN Com
Jumpers J1 installed and J2 removed. Allows for two
separate 24VAC transformers, one for supplying
power to the IZAC and the other for the load relays.

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -8
Output-1 Load Relay
FIGURE 6: HOA-5 Single transformer for load relays and IZAC
EXTERNAL
STEP DOWN
Transformer
24VAC Input
Voltage.
24 VAC
INPUT
N.C.
N.O.
24VAC
Coil Input
To Normally Open load
connection.
To Normally Closed load
connection.
Pins 19 and 21 must be connected,
for the HOA LEDs to function when
power is applied to the output.
OUT 1 Common
OUTPUT - 1
OUT 2 Common
OUTPUT - 2
OUT 3 Common
OUTPUT - 3
OUT 4 Common
OUTPUT - 4
No Connection
24 VAC HOT
24 VAC RET
24 VAC INT
24 VAC INT
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
Common
OUT 2
Common
OUT 3
Common
OUT 4
Common
No
Contact
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 1 Com
IN 2
IN 2 Com
IN 3
IN 3 Com
IN 4
IN 4 Com
No Contact
MANUA
L
ANALO
G
AUTO
OFF
ON
POW
ER
ON
O
O
O
O
O
O
O
J1
J2
JB1
1
JB2
1
2
3
4
J3
&
J4
XMT
RCV
C
C
R
J5
BATTERY
DU-1 CONNECTION
IZAC 4
24 INT
Com
N/O
OUT1
N/C
JP
This JP jumper configuration will allow the IZAC to
produce 24VAC on output 1 when the relay is energized or
a N/O dry contact between the output and output common,
when J2 is removed.
J1 jumper provides power to the IZAC. With J2 in place
the load uses the same 24VAC that is supplying power to
the IZAC. When J2 is removed, the JP jumper
configuration produces a Normally Open, dry contact
between Output 2 and Output 2 common.
NOTE:The Output Common will always
be HOT when jumped as shown for
Output 1, with J2 in place and JP's 24
INT jumped to Com.
HOA status LEDs will be ON
when power is applied to the
Output, dry contact will not
light the HOA LEDs.

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -9
FIGURE 7: HOA-5 individual IZAC and load relay transformers
Output-1 Load Relay
24 VAC HOT
24 VAC RET
24 VAC INT
IZAC
24 VAC
INPUT
N.C.
N.O.
24VAC
Coil Input
24 VAC INT
To Normally Open load
connection.
To Normally Closed load
connection.
EXTERNAL
STEP DOWN
Transformer
24VAC Input
Voltage.
Second 24VAC for
load relays.
Load Relay
24 VAC
INPUT
O
O
O
O
O
O
O
J1
J2
JB1
1
JB2
1
2
3
4
J3
&
J4
XMT
RCV
C
C
R
J5
BATTERY
DU-1 CONNECTION
IZAC 4
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
Common
OUT 2
Common
OUT 3
Common
OUT 4
Common
No
Contact
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 1 Com
IN 2
IN 2 Com
IN 3
IN 3 Com
IN 4
IN 4 Com
No Contact
MANUA
L
ANALO
G
AUTO
OFF
ON
POW
ER
ON
Jumpers J1 installed and J2 removed. Allows for two
separate 24VAC transformers, one for supplying
power to the IZAC and the other for the load relays.
OUT 1 Common
OUTPUT - 1
OUT 2 Common
OUTPUT - 2
OUT 3 Common
OUTPUT - 3
OUT 4 Common
OUTPUT - 4
No Connection

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -10
FIGURE 8: HOA 0-10V Override connections.
Output
Common
0-10V Out
O
O
O
O
O
O
O
J1
J2
JB1
1
JB2
1
2
3
4
5
6
7
8
J3
&
J4
XMT
RCV
C
C
R
J5
BATTERY
DU-1 CONNECTION
IZAC 8
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
POWER
ON
ON OFF AUTO
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
Output
Common
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN Com
0-10V In
0-10V Out
0-10VDC
Control Signal
0-10VDC
controlled
device
+
-
Feedback Voltage
Common
+12VDC
+12VDC IN
GND
Earth Ground
required for
proper transient
protection.
Feedback signal from HOA used to detect switch activity.
IZAC Sensor Type set to 0-10V(See IZAC documentation).
0-10V output signal from the controller, routed to the HOA's 0-10V
Out. Can also come from AO4 (See IZAC documentation).
0-10V Jumper setting for IZAC input 8
IN 8
Input
Common
Unregulated +12VDC from IZAC
used to supply power to 0-10V
Override circuit on HOA.
NOTE: The 0-10V connections shown here are the same for the HOA-9 and HOA-5. See
IZAC-4 documentation for respective input connections used for the HOA-5.

DOCUMENT NO: ZL-HOA-4-8 REV. 1 Copyrights  1997 SOLIDYNE CORP. 4215 KIRCHOFF ROAD , ROLLING MEADOWS ILL. 60008 USA TEL [phone] FAX [phone] PAGE -11
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
POWER
ON
ON OFF AUTO
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
Output
Common
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN Com
GRD
24VAC
INT
Common
Feed-
back
Cntr 0-
10VDC
Manual
0-10V
+12VDC
24VAC
Ext
24VAC
Ret
24VAC
INT
OUT 1
Common
OUT 2
Common
OUT 3
Common
OUT 4
Common
No
Contact
24VAC
EXT
24VAC Ret
24VAC
INT
IN 1
IN 1 Com
IN 2
IN 2 Com
IN 3
IN 3 Com
IN 4
IN 4 Com
No Contact
MANUA
L
ANALO
G
AUTO
OFF
ON
POW
ER
ON
HOA-9
HOA-5
OFF
ON
AUTO
FIGURE 9: HOA switch positions
NOTE: Status LEDs on the HOA boards
light when 24VAC is being applied to the
respective output. This condition can
occur in an AUTO or ON position. Dry
contact wiring, not producing 24VAC on
the outputs, from the IZAC will not light
the status LEDs.