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Concept
Products:
AS-B
Functionalities:
Hardware
Product version:
3.3, 2022, 2023, 2024, 7.0
7/21/2021
Triac Outputs
The triac outputs can be used in many applications to switch 24 VAC on or off for external loads such as actuators, relays, or indicators. Triacs are silent and do not suffer from relay contact wear.
The outputs can be configured as one of the following types:
Digital output
Digital pulsed output
Tristate output
Tristate pulsed output
Outputs
The DO triac outputs are designed to switch 24 VAC. The common terminals COM1 and COM2 can be connected to 24 VAC or to ground. DO5 and DO6 share common terminal COM1. DO7 and DO8 share common terminal COM2. The terminals are opto-isolated from the controller.
Figure:
Triac output internal configuration
R V1 and R V2 are varistors (95 V, 2 J) for protection of the triac.
R 1 = 47 ohm
C 1 = 22 nF
Specifications
Channels, AS-B servers with 24 I/O points
|
0
|
Channels, AS-B servers with 36 I/O points
|
4, DO5 to DO8
|
Output rating
|
Max. 0.8 A
|
Voltage
|
24 VAC +/-20 %
|
Commons
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COM1 for DO5 and DO6
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COM2 for DO7 and DO8
|
|
| The common terminals COM1 and COM2 can be connected to 24 VAC or to ground. | |
Common voltage, high side output
|
24 VAC
|
Common voltage, low side output
|
0 VAC (ground)
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Minimum pulse width
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100 ms
|
AS-B Servers
AS-B Server Onboard I/O