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Concept

Concept


Products: DO-FC-8
Functionalities: Hardware
Product version: 3.3, 2022, 2023, 2024, 7.0, 7.1
9/30/2026

DO-FC-8 and DO-FC-8-H Central IO Modules

arrow1_rotation Digital outputs arrow1_rotation Specifications

These Central IO modules are digital output, Form C relay, 8-channel I/O modules. The Form C relays are designed for direct load applications for up to 3 A loads.

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 supported output types include the following:

  • Digital (Form C)

  • Tristate

Each digital output channel has a dedicated green status LED for local monitoring of the output. The front panel contains status LEDs for both the I/O channels and the module.

 
action_zoom_plus_stroke DO-FC-8-H Central IO module
Figure: DO-FC-8-H Central IO module

Digital outputs

The Form C digital outputs are switching contacts with one common terminal (C), one normally open terminal (NO), and one normally closed terminal (NC). The terminals are isolated from signal ground.

 
action_zoom_plus_stroke Form C digital output internal configuration
Figure: Form C digital output internal configuration

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

Output channels
8
DC input supply power
2.2 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 TB-IO-W1
0.332 kg (0.73 lb)
Weight including terminal base TB-IO-W1-2
0.362 kg (0.80 lb)
Weight excluding terminal base
0.209 kg (0.46 lb)
Terminal base
TB-IO-W1
  
TB-IO-W1-2
Digital outputs
 
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Contact rating
250 VAC/30 VDC, 3 A, Pilot Duty (Power Factor 0.35)
Switch type
Form C Relay
  
Single Pole Double Throw
  
Normally Open or Normally Closed
Isolation contact to system ground
5000 VAC
Cycle life (Resistive load)
At least 100,000 cycles a
a) Actual relay life will vary depending on electrical load characteristics, switching conditions, environmental factors, and application usage.
Minimum pulse width
100 ms
LED polarity energized relay
On
LED polarity non-energized relay
Off
LED color
Green

See Also

  • I/O Modules
  • Output Modules
  • Important Information on Central IO Modules with Manufacturing Date Earlier Than 2021-W26