Emerson IC694ALG220A PACSystems RX3i Four-Point Analog Voltage Input Module
A four-point analog voltage input module with a preserved A revision, published dual-supply load and a signal boundary distinct from the current-input companion.
Product Identification
IC694ALG220A acquires four analog voltage channels for compatible PACSystems RX3i and Series 90-30 installations. The controller identifies the base hardware as a four-point analog input class, while project configuration establishes the ranges and engineering interpretation used by the process.
The A suffix belongs to the physical record. This module must remain distinguished from IC694ALG221A: both have four points, but IC694ALG220A is the voltage-input execution and has a different published current demand.
Retain the A revision, rack location, input-range schedule and terminal documentation. Four channels alone do not identify the correct analog signal type.
Engineering Data
- Input signal family
- Analog voltage
- Number of points
- 4
- Controller class
- ALG IN 4
- Hardware suffix
- A
- 5 V backplane load
- 27 mA
- Isolated 24 V load
- 98 mA
- Remote-node configuration marker
- PNS version 1.00 for the base module class
Functions
Acquire
Converts four field-voltage signals into controller input values for configured process logic.
Separate identities
Maintains a voltage-input hardware path distinct from the similarly named four-point current module.
Support maintenance
Provides one slot-level identity for range checks, loop documentation and spare control.
About IndustryParts
https://www.industryparts.com/Controlled handling for IC694ALG220A
IndustryParts keeps the submitted IC694ALG220A identity, requested quantity and installed-system evidence together so a proposed supply can be checked before dispatch.
- Suffix and MOD identity kept visible
- Mating hardware recorded before supply
- Acceptance evidence linked to the order
Applications
Voltage-output instruments
Four-channel acquisition where the connected devices provide the configured voltage signals.
Legacy rack service
Maintenance of installed RX3i or Series 90-30 arrangements whose project names the ALG220 base module.
Controlled analog replacement
Exchanges in which wiring polarity, range, common reference and A revision remain documented.
Lifecycle
Survey
Photograph the full label and terminal assembly; record slot, channel range, common reference and conductor polarity.
Compare
Verify rack support and include the 27 mA at 5 V and 98 mA at isolated 24 V loads in the power budget.
Replace
Isolate affected sources and rack power, then transfer the approved terminal assembly without changing channel order.
Prove
Inject known voltages and compare controller values, scaling, diagnostics and alarm behavior with the baseline.
FAQ
How does IC694ALG220A differ from IC694ALG221A?
IC694ALG220A is the four-point voltage-input model; IC694ALG221A is the four-point current-input model.
Which power loads are published for IC694ALG220A?
Emerson lists 27 mA at 5 V DC and 98 mA from isolated 24 V DC.
What data should accompany a IC694ALG220A quotation?
Include the complete A label, rack and slot, terminal identity, voltage ranges, common-reference arrangement and requested quantity.
Is matching the ALG IN 4 class enough to select IC694ALG220A?
No. The field signal must be voltage, and rack support, power budget and terminal details must also match.
How should IC694ALG220A be accepted after exchange?
Apply documented test voltages and verify every used channel, project scaling, diagnostics and associated alarms.
