Installation Notes
- The I/O terminal block is recommended to provide screw terminations for field wiring for the AI, 8-Channel, 4–20 mA, AI, 8-Channel, 4–20 mA, HART and the Series 2 AI, 8-Channel, 4–20 mA, HART cards. Optional terminal blocks are the fused and 4-wire I/O blocks, the 16 pin mass termination block for 2-wire applications, and the 24-pin mass termination block for 4-wire applications.
- The Redundant Analog Input terminal block is recommended to provide screw terminations for field wiring for Series 2 Redundant AI, 8-Channel, 4–20 mA, HART cards for either 2-wire or 4-wire applications.
- To function correctly, the AI cards require that 24 VDC be supplied through the bussed field power connection. The 4-wire termination block is designed for use with 4-wire field-powered transmitters. Power for these transmitters must be provided from an appropriate external power source. See the transmitter specifications for power source information. For example, if you are using the DeltaV AI, 4–20 mA I/O card with a DeltaV 4-wire Termination Block, an external power source must be connected to the 4-wire transmitter.
- The open HART protocol layers digital information on the standard analog 4-20 mA process signal.
Specifications
| Item | Specification |
|---|---|
| Number of channels | Eight |
| Isolation | Each channel is optically isolated from the system and factory tested to 1500 VDC. |
| Nominal signal range (span) | 4 to 20 mA |
| Full signal range | 1 to 22.5 mA, with overrange checking |
| Valid range for LED indication | 0.75 to 23 mA |
| LocalBus current (12 VDC nominal), per card | 120 mA typical, 150 mA maximum
Series 2 (for each card in Redundant mode only(1)): |
| Field circuit power, per card | 300 mA maximum at 24 VDC (±10%) |
| Field circuit per channel | 32 mA maximum
Series 2: |
| Accuracy over temperature range | 0.1% of span |
| Resolution | 16 bits |
| Repeatability | 0.05% of span |
| Rolloff frequency | -3 dB at 2.7 Hz, -20.5 dB at one-half the sampling frequency |
| Calibration | None required |
| Communications Support (only for version with HART) | |
| HART scan time | 600-800 ms (typical) per enabled channel |
| Optional fuse (Simplex mode only) | 2.0 A |
| Mounting | Assigned slot of I/O carrier |
(1) Double for a redundant pair.
