Carrier Omnizone 50BVC Installation, Start-Up, Service And Controls Operation And Troubleshooting page 38

Wiring Inputs and Outputs
Refer to Table 17 for wiring inputs and outputs.
INPUT MAXIMUM LENGTH
0-5 VDC 1000 feet
0-10 VDC (305 meters)
3000 feet
0-20 mA
(914 meters)
Thermistor
1000 feet
Dry contact
(305 meters)
Pulse counter
100 feet
RTD
(30 meters)
ZS sensor
500 feet
BACview
(152 meters)
Equipment Touch
LEGEND
AWG — American Wire Gage
RTD — Resistance Temperature Detector
Input – I/O Flex 6126 Controller
The I/O Flex 6126 controller has 12 inputs that accept the sig-
nal types described below. See Table 18
Table 18 — I/O Flex 6126 Controller Inputs
SIGNAL TYPE
INPUT
SUPPORTED
Thermistor
Type 2 (10 K ohm at 77° F). Input voltages
RTD
should be from 0.489 VDC to 3.825 VDC
All
0–10 Vdc
for thermistors.
4-20 mA
A 5 VDC wetting voltage detects contact
position, resulting in a 0.5 mA maximum
All Dry contact
sense current when the contacts are
closed.
0-20 mA
The input impedance of the I/O Flex 6126
UI-1, UI-2
controller is approximately 1 Mohm.
Pulse input
BINARY OUTPUTS
The I/O Flex 6126 controller has 6 binary outputs that can be
connected to a maximum of 24 VAC/VDC inputs. Each output is
a dry contact rated at 1A, 24 V maximum and is normally open.
To size output wiring, consider the following when field install-
ing accessories:
• Total loop distance from the power supply to the control-
ler, and then to the controlled device
NOTE: Include the total distance of actual wire. For 2-conductor
wires, this is twice the cable length.
• Acceptable voltage drop in the wire from the controller to
the controlled device
• Resistance (ohms) of the chosen wire gage
• Maximum current (amps) the controlled device requires to
operate
ANALOG OUTPUTS
The I/O Flex 6126 controller has 6 analog outputs that support
voltage or current devices. The controlled device must share the
same ground as the controller and have the following input
impedance:
0 to 10 VDC min 500 ohms
0 to 20 mA min 800 ohms
See Table 20 for a detailed list of standard inputs and outputs.
TO WIRE FIELD ACCESSORIES ON THE I/O FLEX 6126
CONTROLLER OR I/O FLEX EX8160 EXPANDER
1. Turn off power to the I/O Flex 6126 controller.
Table 17 — Input Wiring Specifications
MINIMUM GAGE
26 AWG
26 AWG
22 AWG
22 AWG
18 AWG, 4 conductor if BACview is connected to the Rnet
22 AWG, 4 conductor if only RS room sensors are connected to the Rnet
.
DESCRIPTION
2. Connect the input or output wiring to the screw terminals on
the controller:
• Connect the shield wire to the GND terminal with the
ground wire.
• For a loop-powered 4 to 20 mA sensor, wire the sensor's
positive terminal to the + terminal on the I/O Flex 6126
controller's Aux Power Out Port. Wire the sensor's nega-
tive terminal to an input's + terminal.
3. Set the appropriate jumpers on the I/O Flex 6126 controller.
See Table 19.
Table 19 — I/O Flex 6126 Controller Jumper Settings
USE TYPE
Thermistor
Dry Contact
0-5 Vdc
Any Input
0–10 Vdc
0-20
mA RTD
Aux Loop-pow-
Power ered
4-20 mA
Out Port
4. Connect the binary output wiring to the screw terminals on
the I/O Flex 6126 controller and to the controlled device
(Fig. 29).
Fig. 29 — Binary Output Diagram
38
SHIELDING
Shielded
Shielded or unshielded
Shielded
Shielded
Shielded or unshielded
DESCRIPTION
Set each input's Universal Input Mode
Select jumper to the type of signal the input
will receive
Set the Select jumper to +5V or +24V as
required by the sensor.