GE Mark VIe IS220PAICH1A (336A4940 CSP3) – Analog Input I/O Pack for 4–20 mA Process Signals

The GE Mark VIe IS220PAICH1A is an analog-input I/O pack typically used to acquire 4–20 mA process signals in Mark VIe and Mark VIeS control systems. From my experience, it’s the go‑to replacement when you need stable, low‑noise AI collection without reworking field wiring—because it plugs directly onto the matching terminal board. The “336A4940 CSP3” part marking is often referenced in the field for traceability and build option tracking, and the “C” suffix usually indicates a conformal‑coated unit for harsher atmospheres.

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• Warranty: 365 days
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We typically pre‑test and pack modules in anti‑static protection. If you’re replacing an existing PAIC in a running Mark VIe node, we can align the shipment to your outage window to reduce downtime.

Key Features

• Purpose‑built for 4–20 mA loops – Designed to acquire industrial analog current signals with stable biasing and low drift when paired with the correct terminal board.
• Direct mount to terminal boards – Plugs onto GE Mark VIe AI boards (e.g., IS200TAICH1x / IS200SAICH1x), so you keep existing marshalling and wiring intact.
• Dual-redundant Ethernet (IONet) – Two 10/100Base‑T ports help maintain communication resilience to the controller network.
• Fast swap in the field – Field‑replaceable module; in many cases, you can change the pack without disturbing field wiring. Redundancy allows planned swaps with minimal process impact.
• Conformal-coated variant – The CSP3 build code commonly denotes conformal coat to improve resistance against humidity and corrosives.
• Self-diagnostics – Health status and module alarms reported to the controller help maintenance teams spot issues early.

Technical Specifications

Brand / Model	GE Mark VIe IS220PAICH1A (also referenced with part build 336A4940 CSP3)
HS Code	8538.90 (Parts for electrical control apparatus)
Power Requirements	Power provided via associated terminal board; nominal ~28 VDC (from Mark VIe backplane supply)
Operating Temperature	Typically −40 to +70 °C for Mark VIe I/O packs (application dependent)
Signal Input Types	Analog current (commonly 4–20 mA; also 0–20 mA). 0–5 V use is typically via appropriate shunt on the terminal board.
Communication Interfaces	Dual 10/100 Mbps Ethernet (IONet) via RJ45 for redundant networks
Installation Method	Direct-mount on GE analog input terminal boards (e.g., IS200TAICH1x / IS200SAICH1x) within a control cabinet

Application Fields

You’ll typically see the IS220PAICH1A on:

• Gas/steam turbine auxiliaries – pressure, level, and temperature transmitters feeding the Mark VIe controller
• Compressors and drives – 4–20 mA feedback for process and equipment protection loops
• Refining, petrochemical, and power generation – balance‑of‑plant instrumentation consolidation
• Water treatment and utility skids – multi‑loop AI collection in compact cabinets

A maintenance lead at a combined‑cycle plant told us they swapped a failing PAIC during a hot standby—no rewiring, the redundant network picked it up, and the unit stayed online. That’s the kind of small thing that saves a night shift.

Advantages & Value

• Drop‑in compatibility – Works with existing Mark VIe terminal boards, so changeout is straightforward.
• Lower total downtime – Field‑replaceable design and dual Ethernet typically reduce outage time and commissioning risk.
• Lifecycle support – Common spares strategy across Mark VIe I/O packs makes stocking easier.
• Quality checked – Units are function tested prior to shipment; firmware/build details can be matched to your installed base where needed.

Installation & Maintenance

• Cabinet & environment – Install within a Mark VIe/VIeS cabinet or equivalent enclosure; keep good ventilation and avoid corrosive ingress even with coated builds.
• Terminal board pairing – Use with the correct AI current terminal board (e.g., IS200TAICH1x or IS200SAICH1x). Verify shunt resistors and loop power on the TB for your transmitter type.
• Wiring practices – Shielded twisted‑pair for analog loops; land shields per site grounding policy. Maintain separation from high‑voltage cables where possible.
• Network – Connect both RJ45 ports to the redundant IONet switches. You might notice cleaner failover if port roles match your site standard.
• Routine care – Periodic visual check for corrosion or loose seating; confirm loop calibration at the transmitter; align firmware/build revisions with your controller baseline before swap.
• Safety – De‑energize the cabinet or follow your LOTO and hot‑swap procedures dictated by site policy and redundancy state.

Quality & Certifications

• Manufactured to industrial control standards; GE Mark VIe hardware is typically supplied under ISO 9001 quality systems
• CE marking and UL/CSA conformity are commonly cited for Mark VIe I/O packs (verify per supplied build documentation)
• RoHS/Reach status available on request by part/build code
• Warranty: 365 days

Compatible / Supporting Components

• IS200TAICH1x – Analog Input (Current) terminal board for multi‑loop 4–20 mA signals
• IS200SAICH1x – Simplex Analog Input terminal board variant for compact installations
• IONet Ethernet switches – Redundant network backbone for Mark VIe I/O packs

Note: Exact channel count and scaling are defined by the terminal board and site configuration. If you share your existing board part numbers, we’ll confirm fit and configuration before shipment.