Rockwell Automation AADvance Controller System Build - Manual (Page 64)

3-20 Document: 553632
(ICSTT-RM448_EN_P) Issue: 08:
System Build Manual (AADvance Controller)
Recommended Field Circuit for Digit Recommended Field Circuit for Digit Recommended Field Circuit for Digit Recommended Field Circuit for Digital Outputs al Outputs al Outputs al Outputs
This circuit is suitable for simplex and dual configurations of digital output modules.
The two 10A fuses shown are included on the termination assembly within the
controller. The field power 5A fuses comply with UL508 requirements see illustration
below..
The 10A fuses are fitted into the termination assembly and are:
T9902: SMF Omni-Block, Surface Mount Fuse Block 154 010, with a 10A, 125V
Fast Acting Fuse, Littlefuse.
The field power input 5A fuses are:
No 396/TE5 5A time lag fuse; UL 248-14, 125 V,T Leadfree; manufactured by
Littlefuse.
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 10mA per module, 20mA for a
dual pair.
For inductive loads, a back EMF protection diode shall be fitted at the load.