7
CONTROL AND DISPLAY
Controller —
The microprocessor-based controller pro-
vides complete system control of unit operation. See Fig. 3 for
typical controller components. The controller monitors all sys-
tem sensors and makes operating decisions based upon the us-
er's configuration inputs. See Fig. 4.
A scheduling function, programmed by the user, controls
the occupied/unoccupied schedule. Up to 4 daily schedules, 12
holiday schedules, and 2 override schedules may be
programmed.
Local access to the microprocessor control may be accom-
plished via the BACview keypad/display unit (BV6H). See
Fig. 3. Recommended application is one BACview display per
jobsite.
The microprocessor control is capable of operating in a
stand-alone control mode and also supports communications
with BACnet, Modbus, and optionally LonWorks building au-
tomation protocols.
In addition, the microprocessor control has the following
features:
• simple access to set points, time schedules, status values,
and unit configuration parameters
• alarm conditions are indicated via an alarm LED (light-
emitting diode) and/or an audible signal
• password protection
• compressor minimum off time (5 minutes) feature
• service diagnostic mode
• field-installed room temperature sensor
• an on/off switch that may be used to cycle the controller
• a battery to maintain time and date in the event of a power
outage (do not remove the battery when power is off)
• DIP switches to configure communication baud rate and
protocol
The IO Flex 6126 controller has 6 binary outputs, 12 uni-
versal inputs and 6 analog outputs. Binary outputs have N/O
(normally open) and N/C (normally closed) contacts used to
turn components on or off. The universal inputs are used to
monitor input from various sensors. These universal inputs can
be set for one of three different sensor input types:
1. Voltage,
2. Temperature (thermistor) or discrete contact, or
3. Current.
There are 2 columns of jumpers to the left of the universal
input plugs, see Fig. 4. The jumpers are used to configure the
input to the desired type (voltage, temperature, etc.). The left
row of jumpers are for the even numbered universal inputs, UI-
12 thru UI-2 (top to bottom). The right column of jumpers are
for the odd numbered universal inputs, UI-11 thru UI-1 (top to
bottom). When the jumper is in the center position (default set-
ting) the universal input is configured for temperature and dis-
crete contact (digital input), such as duct high-limit switch.
When the jumper is in the top position, the input is configured
for a voltage input, for example, a humidity sensor. The bottom
jumper position is used for milliamp input.
The following settings are made at the factory, see Fig. 5:
1. Auxiliary Power Output (Aux Pwr Out) jumper should be
set on 24V to power the 0 to 10 vdc sensors.
2. Analog outputs (AO) labeled AO-1 and AO-2 should be
set on Volts.
3. The module address (MAC) rotary switches are set for
'01' from the factory. The MAC may be reconfigured in
the field if required.
NOTE: To download software to the I/O Flex 6126, the
MAC setting must be on '01'.
Example: If the control module’s address is 01, point the
arrow on the tens (10’s) switch to 0 and the arrow on the
ones (1’s) switch to 1. See Fig. 4.
NOTE: The I/O Flex 6126 recognizes its address only af-
ter power has been cycled.
The communication rate is factory-configured for 38.4 baud
rate.
Aux
+
Gnd
Aux Pwr Out
+5V
+24V
2
1
+
4
3
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
UI-01
+
Gnd
+
Gnd
+
+
Gnd
+
+
Gnd
+
+
Gnd
+
+
Gnd
+
UI-02
UI-03
UI-04
UI-05
UI-06
UI-07
UI-08
UI-09
UI-10
UI-11
UI-12
AO-2
AO-3
AO-4
AO-1
Gnd
+
+
3
1
2
7
+
Gnd
Gnd
+
6
4
5
Gnd 8
9
+
Gnd
AO-5
10
Gnd
AO-6
12
11
+
Gnd
Xnet -
Xnet +
Xnet
Remote
Expansion
2
BO-1
1
9
BO-3
BO-2
4
5
3
BO-4
6
7
8
BO-5
BO-6
12
11
10
13
14
16
15
18
17
I
/
O
Flex 6126
Pwr Out
AO Mode Select
10V
20mA
20mA
10V
BACnet
®
Universal
Mode
RTD
0-10V
0-20mA
Power
Off
24VAC
Gnd
Batt
CR2032
-
+
Port 2b*
Gnd
Rnet +
Rnet -
+12V
Rnet
+12V
Rnet
Rnet-
Gnd
Rnet+
Sense
Local
Access
Run
Error
Rx
Tx
Module
10's
9600
76
.8k
19.
2k
38.
4k
Baud
Full Half
Duplex
BT485
BT485
Net +
Port 1
Gnd
Net -
Tx
Rx
CAUTION:
To Reduce The Risk of Fire
Interconnect the Outputs of
Different Class 2 Circuits.
or Electric Shock, Do Not
BO Rating 5A @ 250VAC
Class 2
24VAC, 50-60 Hz
20VA, 0.83A
Use Copper
Conductors Only
232
EIA- EIA-
485
Port 1
Port 2a
Therm
Dry
Unused
5
6
7
8
Network
Switches
(0 = off, 1 = on)
MSTP (m)
MSTP (s)
PTP
SLTA
*PlugIn
*Ethernet
8 7 6 5
Protocol
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
B
A
Cnet
N2
Modbus
LON
®
®
®
®
Port 2a
2w 4w
Tx+
n/c
n/c
Net+
Rx+
Rx-
Tx-
Net-
232
Tx
DTR
DCD
Rx
Signal Ground
Address
1's
On
Pulse Count Ability
Input
Select
Rate
F
or
mat
Made in USA
ARC156
Only
26VDC, 0.17A, 4W
Management Equipment
TYPE: 002108
Open Energy
R
88FO
E143900
19
20
Unused
Even Odd
POWER 24 VAC
BACVIEW6
(R
S
) ROOM
S
EN
S
OR
UNIVER
S
AL
INPUT
S
ANALOG
OUTPUT
S
BINARY
OUTPUT
S
MENU:
<ALARM> UNOCCUPIED
OAT:000.0
°
.
0
0
0
:
T
A
L
F
0
°
F
SHUTDOWN:[Off] 100% OA
STD PROGRAM
”
[ OK ][
CANCEL
][ DECR ][ INCR ]
1
2
3
4 5
MUTE
FN
6
7
8
9 0 •
ENTER
BAC
view
6
Fig. 3 — Typical Controller Components
a62-608
