2. Series 8 I/O
Planning and Design
2.3. Series 8 I/O and C300 topology
R500
Series 8 I/O User's Guide
27
April 2017
Honeywell
I/O module/IOTA
Feature/function
Digital Output 24Vdc
Extensive self-diagnostics
Functional redundancy
Output direct/reverse
Safe-state (FAILOPT) behaviors
Each channel can be configured to HOLD LAST
VALUE, or SHED to a SAFE VALUE.
Fuse-less short circuit protection allows a short circuit to
exist without blowing any fuses. When a particular
channel is shorted, internal circuits detect this and remove
power to the field connection. The channel remains de-
energized until the short circuit is repaired.
Latched, pulsed or pulse-width modulated output
Galvanic isolation
Output read back checking to screw terminal
TC/RTD
TC and RTD operation
Remote cold junction capability
1 sec PV scanning with OTD protection
Configurable OTD protection (See below)
Temperature points can be added in 16 point increments
Digital Input Pulse
Accumulation module
Extensive self-diagnostics
IOM redundancy
Input direct/reverse for Digital Input channels
Internal or external field power selections
Galvanic isolation
PV processing or Pulse Accumulation functionality based
on the user configuration.
2.3 Series 8 I/O and C300 topology
Series 8 I/O is attached to an IOLINK that is being mastered by a C300 controller. It is
important to note that the IOLINK serves as data repository for IOM function blocks in
Control Builder to provide communications interface with Series 8 I/O.