All I/O cards are enclosed in a common form factor that plugs

into the I/O interface carrier. The housing is clearly labeled with

the enclosed I/O card type. All cards have power and internal

error indicators. Eight-channel cards have clearly visible channel status LEDs.

All cards meet ISA G3 corrosion specifications by the careful

selection of superior electronic components and the use of conformal coating.

Pulse Counters are available on most DI cards. The supported

maximum frequency varies from 0.1 Hz on AC signals to

75 or 120 Hz on 24V DC inputs. For higher pulse counts,

up to 50 KHz, use the Multi-Function card’s high speed pulse input.

The DeltaV system provides control module level time

stamping for log events and alarms. For greater event

resolution, the 16-channel Sequence-of-Events DI card

can provide signal driven events to a resolution of +/- 0.25 ms

per card, or within 1 ms per controller. Please refer to

the Sequence-of-Events PDS for more information on

Sequence-of-Event data collection and system options for this feature.