Interface Specifications > I/O Cards

AO, 16-Channel, 4-20 mA HART, Series 2 Plus

Installation notes

The Redundant 16-Channel Analog Output Terminal Block is recommended to provide screw terminations for a redundant pair of AO, 16-Channel, 4-20 mA HART, Series 2 Plus cards.
The Simplex 16-Channel Analog Output terminal Block provides screw terminations for the AO, 16-Channel, 4-20 mA HART, Series 2 Plus card in Simplex mode.

Specifications

Table: AO, 16-Channel, 4-20 mA HART, Series 2 Plus specifications
Item	Specification
Number of channels	16
Isolation	Each channel is galvanically isolated from the system and factory tested to 1000 VDC. (No channel to channel isolation.)
Nominal signal range (span)	4 to 20 mA
Full signal range	1 to 23 mA
LocalBus current (12 VDC nominal), per card	260 mA maximum in redundant configurations
Field power (per card)	400 mA maximum at 24 VDC
Accuracy over temperature range	0.25% of span
Resolution	14 bits
Output compliance	Voltage to load: 14 V minimum @ 20 mA Load Resistance: 700 Ω maximum
Open loop detection	Detection threshold: 0.70 mA
HART communications support	HART pass-through request/response HART variable report Field device status report
HART scan time	600-800 ms (typical) per enabled channel
Mounting	Assigned slot of I/O carrier

Wiring diagram

Figure: Wiring diagram for AO, 16-Channel, 4-20 mA HART, Series 2 Plus

Figure: Wiring diagram for AO, 16-Channel, 4-20 mA HART, Series 2 Plus (Simplex)