STAHL 9468/33-08-10 Hart Analog I/O Module

Item Overview

The 9468/33 series HART Analog Universal Module for Zone 2, Cl. I, II, Div. 2 has eight channels that can be used individually for Ex i operating two-/three-conductor HART transmitters, four-conductor transmitters or control valves/positioners with 0/4 to 20 mA signals. HART communication is bidirectional. All inputs/outputs are short-circuit proof, galvanically separated from the system and individually monitored to check for line faults.

Performance Specifications

Power supply connection:

BusRail types 9494

Auxiliary power version:

Intrinsically safe Ex ia via BusRail

Current consumption:

220 mA (at 20 mA per channel)

Max. power consumption:

5.3 W (at 20 mA/channel)

Max. power dissipation outputs:

3.7 W (at 20 mA. 500 Ω/channel)

Max. power dissipation inputs:

2.7 W (at 20 mA/channel)

Test voltage for galvanic separation:

Acc. to standard EN 60079-11

Auxiliary system components:

≥ 1500 V AC

I/O module / I/O module:

≥ 500 V AC

I/O channels/system components:

≥ 500 V AC

I/O channels / ground (PA):

≥ 500 V AC

Max. signal for input:

23.5 mA

Max. input short-circuit current:

24 mA

Max. input resistance:

14.1 Ω per channel

Output step response (10 to 90%):

40 ms

Max. output short-circuit current:

22,8 mA (4 ... 20 mA) 23,5 mA (0 ... 20 mA)

Max. signal for output:

22.8 mA (4 to 20 mA) 23.5 mA (0 to 20 mA)

Open-circuit voltage U:

22.5 V

Output max. load resistance:

750 ohm at 20 mA 700 Ω at 21.8 mA

Power supply connection:

BusRail types 9494

Application

Flexible I/O configuration: Eight channels, each individually configurable as an input or output, supporting 2-, 3-, or 4-wire transmitters and control valves/positioners with 0/4-20 mA signals.

HART communication: Bidirectional HART protocol enables simultaneous analog signal transmission and digital configuration/diagnostics.

Intrinsically safe Ex ia IIC: Suitable for direct connection to hazardous area equipment (Zones 0, 1, 2, 20, 21, 22) with builtin line fault monitoring.

Hot swap in Zone 2 / Div. 2: Module can be replaced without de-energizing the system, minimizing downtime in hazardous locations.

High accuracy & diagnostics: Measurement error as low as 0.05% (8 µA at 4-20 mA); comprehensive diagnostic LEDs and status bits for wire break, short circuit, overtemperature, and hardware errors.

FAQ

Question

Answer

Q1：Can each channel be independently set as input or output?

A1: Yes, all eight channels are individually configurable as input or output.

Q2：Can the module be hot swapped in hazardous areas?

A2: Yes, it supports hot swapping in Zone 2 / Cl. I, Div. 2.

Q3：What types of transmitters can be connected?

A3: 2, 3, or 4-wire HART transmitters and positioners. 

Q4：What is the intrinsic safety rating?

A4: Ex ia IIC, suitable for connecting to Zone 0/1/2 hazardous area devices.

Q5：What is the measurement accuracy?

A5: Maximum error is 0.05% (approx. 8 µA for 4-20 mA signal).

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