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Concept

Concept


Products: UI-8/AO-4, UI-8/AO-V-4
Functionalities: Hardware
Product version: 3.3, 2022, 2023, 2024
3/31/2022

UI-8/AO-V-4 and UI-8/AO-V-4-H Central IO Modules

arrow1_rotationUniversal inputs arrow1_rotationAnalog outputs arrow1_rotationSpecifications

The UI-8/AO-4 and UI-8/AO-V-4 Central IO modules combine 8 universal inputs and 4 analog outputs.

Note:

Module names with an -H indicate the presence of Hand-Off-Auto override switches.

Note:

The override switches on Central IO modules with manufacturing date earlier than 2021-W26 must be disabled to remove the risk of an improper output. For more information, see Important Information on Central IO Modules with Manufacturing Date Earlier Than 2021-W26 .

The front panel includes a dedicated two-color (red and green) status LED for local monitoring of contact, counter, and supervised input types. You can configure the LED to display either red or green for each input or output state.

 
action_zoom_plus_stroke UI-8/AO-V-4-H Central IO Module

UI-8/AO-V-4-H Central IO Module

Universal inputs

The universal inputs of the UI-8/AO-V-4 and UI-8/AO-V-4-H Central IO modules are designed to read several different types of inputs.

Input types:

  • Digital

  • Counter

  • Supervised

  • Voltage

  • Current

  • Temperature

  • Resistive

 
action_zoom_plus_stroke Universal input internal configuration

Universal input internal configuration

Applied voltages beyond the absolute maximum ratings will cause over current in the protection component D Z .

The I/O bus in the terminal base provides the Central IO module with power and an address.

The address value in the I/O bus is increased by one for each terminal base. The I/O bus also enables RS-485 communication between the Central IO module and the automation server.

Digital inputs

The external connection of a digital input is shown in the following figure.

 
action_zoom_plus_stroke Digital input external connection

Digital input external connection

K is the monitored external switch.

V S = 24 V

R PU = 10 kohm

Counter inputs

A counter input uses the same hardware configuration as the digital input that is shown in the figure above.

Supervised inputs

Supervised inputs are contact closing inputs supplemented with the supervision of the field wiring integrity. This supervision is a required feature in many security system applications. The supervised inputs provide the ability to detect specific forms of tampering or trouble with the wire connections to the field contacts. The supervision is achieved with a combination of 1 or 2 resistors attached to the contact in the field. The resistor combination creates continuous current flow through the field contact loop and presents a defined set of expected resistance values for each of the defined conditions. If someone is attempting to defeat the monitoring of the field contact by short circuiting the wire with a jumper or cutting the wire, the objective is to detect and indicate such a condition. The resistors need to be located at the end of the cable close to the field contact, so that the point where there is a risk that the circuit is defeated is between the resistors and the I/O.

Three different types of supervised input connections are supported:

  • Series only

  • Parallel only

  • Series and parallel

Each type of supervised input connection provides a different capability in regards to what form of tamper/trouble can be detected regardless of switch contact open or closed condition.

Series only: A single resistor, which is connected in series with the switch, can only detect tamper/trouble in the form of a short circuit across the wire pair. A single series resistor supervision is frequently configured with a normally closed field contact. This provides for the short circuit to be detected and a cut wire will show as an alarm condition. The external connection of a series only supervised input connection is shown in the following figure.

 
action_zoom_plus_stroke Series only external connection

Series only external connection

K is the monitored external switch.

R S = 1 to 10 kohm

V S = 5 V

R PU = 10 kohm

Parallel only: A single resistor, which is connected in parallel with the switch, can only detect tamper/trouble in the form of an open circuit in the field wiring loop. With single parallel resistor supervision and use of a normally open switch in the field, the opened wiring shows as a fault and the shorted wiring shows as an alarm condition. The external connection of a parallel only supervised input connection is shown in the following figure.

 
action_zoom_plus_stroke Parallel only external connection

Parallel only external connection

K is the monitored external switch.

R P = 1 to 10 kohm

V S = 5 V

R PU = 10 kohm

Series and parallel: Two resistors, where one is connected in series with the switch and one is connected in parallel with the switch, can detect tamper/trouble conditions in the form of both an open and a shorted circuit. The external connection of a series and parallel supervised input connection is shown in the following figure.

 
action_zoom_plus_stroke Series and parallel external connection

Series and parallel external connection

K is the monitored external switch.

R P = R S ± 5 %, 1 to 10 kohm

V S = 5 V

R PU = 10 kohm

Voltage inputs

The external connection of a voltage input is shown in the following figure.

 
action_zoom_plus_stroke Voltage input external connection

Voltage input external connection

V G is the monitored external voltage (0 to 10 VDC).

R IN = 100 kohm

Current inputs

The external connection of a current input is shown in the following figure.

 
action_zoom_plus_stroke Current input external connection

Current input external connection

I G is the monitored external current (0 to 20 mA).

R SH = 47 ohm

In the internal configuration of the current input, there is a current limit circuit in order to protect the shunt resistor from over load. The input current is limited to 40 mA with a serial connected FET transistor. If this limit is reached for 0.5 seconds, the transistor is turned off. When 5 seconds have elapsed, the transistor is turned on again to make a new start attempt.

Temperature inputs

The external connection of a temperature input is shown in the following figure.

 
action_zoom_plus_stroke Temperature input external connection

Temperature input external connection

R T is the monitored external thermistor.

When a universal input is used as a temperature input, V S and R PU in the internal configuration of the universal input are used according to the following table.

Thermistor type

V S

R PU

20 kohm

5 V

10 kohm

10 kohm

5 V

10 kohm

2.2 kohm

1 V

1.5 kohm

1.8 kohm

1 V

1.5 kohm

1 kohm

1 V

1.5 kohm

The resulting voltage across the thermistor is measured and a temperature is calculated dependent on the selected thermistor type.

Resistive inputs

The external connection of a resistive input is shown in the following figure.

 
action_zoom_plus_stroke Resistive input external connection

Resistive input external connection

R M is the monitored external resistance.

V S = 5 V

R PU = 10 kohm

Analog outputs

The analog outputs of the UI-8/AO-V-4 and UI-8/AO-V-4-H Central IO modules are designed to be used for voltage outputs.

 
action_zoom_plus_stroke Voltage output internal configuration and connection of external resistive load

Voltage output internal configuration and connection of external resistive load

R OUT is approximately equal to 10 ohm.

V OUT range is 0 to 10 VDC.

R LOAD minimum is 5 kohm.

The I/O bus in the terminal base provides the Central IO module with power and an address.

The address value in the I/O bus is increased by one for each terminal base. The I/O bus also enables RS-485 communication between the Central IO module and the automation server.

Specifications

Input channels
8
Output channels
4
DC input supply power
1.0 W
DC input supply voltage
24 VDC
Environment
Ambient temperature, operating
0 to 50 °C (32 to 122 °F)
Ambient temperature, storage
-20 to +70 °C (-4 to +158 °F)
Maximum humidity
95 % RH non-condensing
Material
Plastic flame rating
UL94-5VB
Enclosure
PC/ABS
Ingress protection rating
IP 20
Mechanical
Dimensions including terminal base
90 W x 114 H x 64 D mm (3.6 W x 4.5 H x 2.5 D in.)
 
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Weight including terminal base
0.275 kg (0.61 lb)
Weight excluding terminal base
0.152 kg (0.34 lb)
Terminal base
TB-IO-W1
Universal inputs
 
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Absolute maximum ratings
-0.5 to +24 VDC
A/D converter resolution
12 bits
Digital
Range
Dry contact switch closure or open collector/open drain, 24 VDC, 2.4 mA
Minimum pulse width
120 ms
LED polarity
Software selectable, if the LED is activated when the input is high or low
LED color
Red or green, software selectable
Counter
Range
Dry contact switch closure or open collector/open drain, 24 VDC, 2.4 mA
Minimum pulse width
20 ms
Maximum frequency
25 Hz
LED polarity
Software selectable, if the LED is activated when the input is high or low
LED color
Red or green, software selectable
Supervised
5 V circuit, 1 or 2 resistors
Monitored switch combinations
Series only, parallel only, and series and parallel
Resistor range
1 to 10 kohm
For a 2-resistor configuration, each resistor must have the same value +/- 5 %
Voltage
Range
0 to 10 VDC
Accuracy
+/-(7 mV + 0.2 % of reading)
Resolution
2.7 mV
Impedance
100 kohm
Reliability check
Yes
Current
Range
0 to 20 mA
Accuracy
+/-(0.03 mA + 0.4 % of reading)
Resolution
5.6 μA
Impedance
47 ohm
Reliability check
Yes
Resistive
10 ohm to 10 kohm accuracy
+/-(7 + 4 x 10 -3 x R) ohm
R = Resistance in ohm
10 kohm to 60 kohm accuracy
+/-(4 x 10 -3 x R + 7 x 10 -8 x R 2 ) ohm
R = Resistance in ohm
Reliability check
Yes
Temperature
Range
-50 to +150 °C (-58 to +302 °F)
Reliability check
Yes
Supported thermistors
Honeywell
20 kohm
Type I (Continuum)
10 kohm
Type II (I/NET)
10 kohm
Type III (Satchwell)
10 kohm
Type IV (FD)
10 kohm
Type V (FD w/ 11k shunt)
Linearized 10 kohm
Satchwell D?T
Linearized 10 kohm
Johnson Controls
2.2 kohm
Xenta
1.8 kohm
Balco
1 kohm
Measurement accuracy
20 kohm, 10 kohm, 2.2 kohm, and 1.8 kohm
-50 to -30 °C: +/-1.5 °C (-58 to -22 °F: +/-2.7 °F)
  
-30 to 0 °C: +/-0.5 °C (-22 to +32 °F: +/-0.9 °F)
  
0 to 50 °C: +/-0.2 °C (32 to 122 °F: +/-0.4 °F)
  
50 to 100 °C: +/-0.5 °C (122 to 212 °F: +/-0.9 °F)
  
100 to 150 °C: +/-1.5 °C (212 to 302 °F: +/-2.7 °F)
Linearized 10 kohm
-50 to -30 °C: +/-3.0 °C (-58 to -22 °F: +/-5.4 °F)
  
-30 to 0 °C: +/-1.0 °C (-22 to +32 °F: +/-1.8 °F)
  
0 to 50 °C: +/-0.3 °C (32 to 122 °F: +/-0.5 °F)
  
50 to 100 °C: +/-0.5 °C (122 to 212 °F: +/-0.9 °F)
  
100 to 150 °C: +/-2.0 °C (212 to 302 °F: +/-3.6 °F)
1 kohm
-50 to +150 °C: +/-1.5 °C (-58 to +302° F: +/-2.7 °F)
Analog outputs, AO
 
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Voltage
Range
0 to 10 VDC
Accuracy 
+/-100 mV
Resolution 
42 mV 
Minimum load resistance 
5 kohm 
Load range 
-1 to +2 mA 
Reliability check 
Yes 
  • Central IO Modules
  • Mixed Modules
  • Important Information on Central IO Modules with Manufacturing Date Earlier Than 2021-W26