Honeywell Series 8 I/O User Manual

6. Series 8 I/O Configuration
6.12. Electronic Short-Circuit Protection (Digital Output 24VDConly)
R500 Series 8 I/O User's Guide 201
April 2017 Honeywell
PV Substituted option is removed for the DIGITAL INPUT PULSE ACCUMULATION
point type and the reset option RESETFL parameter is used for resetting the AVRAW
value.
PV Source Selection
The PV source parameter (PVSOURCE) option determines the source of the AVRAW.
The source can be one of the following.
 The AVRAW input from the field
 The AVRAW state entered by the operator (PV manual)
6.12 Electronic Short-Circuit Protection (Digital Output
24VDConly)
The behavior of the Series 8 Digital Output - 24V with Electronic Short Circuit
Protection (in the presence of wiring faults) causes a Digital Output channel that draws
more current than is permitted, to activate the IOM hardware's electronic short-circuit
protection mechanism causing that channel to go unpowered. The feature applies to these
specific model numbers:
 Digital Output IO Module (IOM) (32 channels at 24V) 8X-PDODA1
 8X-TDODA1 Digital Output IOTA (32 channels at 24V)
 8X-TDODB1 Digital Output IOTA Redundant (32 channels at 24V)
Non-redundant Configuration
When the electronic short-circuit protection mechanism activates and the channel goes
unpowered the non-redundant IOM:
 detects the output inconsistency and generates
Soft Failure 23 - Failure in OP circuit/field wiring detected by Analog Output/Digital
Output
 detects the over current and generates:
Soft Failure 180 - Output Short Circuit Detected
 sets:
 the output to unpowered
 Shed Mode to Manual control
 Shed ModeAttr to Operator
You should expect to see:
 Two Soft Failures
 Soft Failure 23 - Failure in OP circuit/field wiring detected by Analog
Output/Digital Output

Honeywell Series 8 I/O Specifications

General

Brand	Honeywell
Model	Series 8 I/O
Category	I/O Systems
Language	English