FAQ (Frequently Asked Questions)

Q1: What is the primary function of IS220PDIOH1B?
A1: Its primary function is to manage discrete input and discrete output signals—monitoring field digital devices and driving relay outputs—and interface them into the Mark VIe control system network.

Q2: Which series does this module belong to?
A2: It belongs to the Mark VIe / Speedtronic series of turbine and industrial control modules from GE.

Q3: What are the dimensions and weight of this module?
A3: The module measures approximately 11.43 cm × 8.89 cm × 5.72 cm, and weighs less than about 0.91 kg.

Q4: What voltage does it operate at?
A4: Nominal voltage is 28.0 V DC (minimum 27.4 V DC).

Q5: What is the operating temperature range?
A5: It typically operates from about ‑30 °C up to +65 °C, making it suitable for harsh industrial settings.

Q6: How many inputs and outputs does it support?
A6: It supports up to 24 discrete inputs and up to 12 relay outputs, depending on the terminal board configuration.

Q7: Does it support network redundancy?
A7: Yes, it features dual Ethernet ports and supports simplex, dual and triple‑redundancy (TMR) configurations when properly wired.

Q8: Can it be used in hazardous locations?
A8: Yes—in conjunction with approved terminal boards, it is suitable for Class I Division 2 / ATEX Zone 2 hazardous area use.

Q9: How easy is it to install or replace?
A9: It is designed for modular plug‑in installation within the Mark VIe rack system, enabling easier replacement and maintenance.

Q10: What should be verified before purchasing this module?
A10: Source the exact model number (IS220PDIOH1B), verify revision level, ensure rack slot compatibility and correct terminal board pairing, check voltage/power requirements, and confirm environmental conditions match spec.