System Description ____________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
2-8
Input/Output Modules
2.5.3.2.1 Discrete Input/Output Module:
This is an I/O Base Module also known as the Discrete I/O Base Module which is the main carrier
board for the following types of I/O modules:
o
Input Unit
o
Solid State Output Unit
o
Relay Output Unit
Below is an I/O Base Module with a Relay Output Unit and Input Unit attached. Input/Output
modules can be freely installed in no particular order.
Extraction Tool
RF Shield
Mid-Plane Connector
Input Unit
Relay Output
Unit
Carrier Board
24
– Position I/O
Terminal Block
Voltage Selection
Jumpers
Form A/B
Switches
1
24
Figure 2-7. Base Input/Output Unit showing Plug-On Boards
Input Unit:
The Input Unit has six inputs which can accommodate 24, 48, 125 or 250Vdc. These
voltages are set on the board by way of selectable jumpers (See Section 3.7.1).
Solid State Output Unit:
The Solid-State Output Unit has six solid state outputs. The contacts are always Form A
(normally open).
Relay Output Unit:
The Relay Output Unit has six relay outputs. The contacts can be Form A (normally
open) or Form B (normally closed) and can be selected by the user with jumpers SW1
through SW6 on the Relay Output Unit (See Section 3.7.4)
