Specifications

15 Publication 1794-SG002D-EN-P - May 2012
Section 1.3
Select FLEX I/O Modules
Step 2 – Select:
I/O modules
The FLEX I/O module plugs into the terminal base, connecting to the I/O bus
and field devices. Since there is no direct wiring to the I/O module, you can
remove and insert modules under backplane power, enabling you to change
modules without disturbing field wiring, other I/O modules, or FLEX backplane
power. This eliminates costly downtime and the inefficiencies of restarting a
system.
The choices and flexibility you have with I/O types range from digital and analog
to temperature and motion control. FLEX I/O allows you to use as many as eight
terminal bases per adapter which can provide a maximum of 256 digital I/O
points or 96 analog channels per adapter. You can mix and match digital and
analog I/O with mounting and wiring options, supplying you with a successful
distributed system solution.
This flexibility gives you the following choices of I/O signal types:
• Digital: AC and DC voltage signals
• Analog: current or voltage
• Relay: normally open, 2 A capability
• Protected outputs: non-latching, latching, and with diagnostics
• Temperature: thermocouple or RTD
• Motion: high-speed counters, flow metering, and totalization
• Combo modules: combination of input and output capability
• Harsh environments: use FLEX I/O XT in harsh environments
• Intrinsic Safety (IS): use FLEX Ex I/O in hazardous areas to connect to
field devices
Digital I/O Modules
Digital I/O modules interface with field devices such as:
• pushbutton and limit switches
• on/off actuators such as motor starters, pilot lights, and annunciators
•relay contacts
Features
Modules are available in different densities ranging from 8 to 32 points.
• Digital I/O modules cover a wide electrical range: