Rockwell Automation Publication ICSTT-RM446N-EN-P - April 2018
77
AADvance Functional Safety System Implementation
Chapter 4
The field power input fuses are 5 A / 125 V, Slow Blow and comply to UL 248
- 14.
Analogue Input Field Loop Circuits
The recommended field loop circuits for analogue inputs are as shown below.
NOTE
1. Alternatively instead of fitting two 5A fuses you can use Class 2 power
supplies for the +24V dc field voltage. Class 2 is defined by the NEC as
providing less than 100 watts (at 24V).
2. The field power must be wired using 12 AWG wire.
3. The field power must be supplied with an isolating source.
4. The minimum current required for line monitoring is 20mA for a dual
pair.
ATTENTION:
For inductive loads, a back EMF protection diode shall be fitted
at the load.
NOTE
For details of how the AADvance digital output module detects field faults,
see article
605753
on the Rockwell Knowledgebase website.
