About the IS220PAICH1B
Hardware Tips and Specifications
Produced by General Electric the IS220PAICH1B module is an analog input/output pack part of the Mark VI series. This model is the second version of the PAIC units and operates on a different minimum voltage compared to that of the previous version of the PAIC pack. The minimum voltage for this specific unit is twenty-two and a half volts of direct current. The nominal power supply used with this model is twenty-four or twenty-eight volts of direct current. While the IS220PAICH1B pack is being used in the Mark VI series it can be used with some accessories otherwise known as terminal boards; the terminal boards used with this specific analog I/O pack are all IS200 boards and are IS200TBAIH1C, IS200TAIH1A, and IS200TAIH2A. The IS200TBAIH1C model is a barrier-type terminal box and requires a minimum wire size of 22 AWG when being connected and used with the IS220PAICH1B pack. This IS220PAICH1B PCB is actually not the originally-developed GE Mark VI Series product of its specific functional role; as that would be considered the IS220PAICH1 parent PCB notably missing this IS220PAICH1B device's sole B-rated functional product revision.
There are specific alarms that will come about when this model is in use, one of the alarms is labeled as 82-83 which focuses on the output and indicates that the suicide relay within the IS220PAICH1B pack is non-functional. The possible cause of this alarm is often that the suicide relay command in the pack does not match the associated feedback, the hardware has failed, or a relay failure has occurred on the acquisition board. The main solution to this problem is replacing the I/O pack itself. The IS220PAICH1B pack can be used in many different locations including hazardous and non-hazardous locations, the certification for the non-hazardous location in accordance with this model is UL E207685. This IS220PAICH1B device is not surrounded by any extreme wealth of originally-released instructional manual materials; almost certainly a reflection of its attribution to the Mark V Turbine Control System Series that suffered a manufacturer-led production and documentation discontinuation. With this being the case, the IS220PAICH1B functional product number can actually be identified as a decently-strong supplementary source of IS220PAICH1B Board hardware information; coding for specific details in a series of consecutive functional naming chunks. For instance, the IS220PAICH1B functional product number begins with a dual-functional initial naming chunk in its IS220 series tag specially designed to indirectly reveal the IS220PAICH1B product's normal Mark V Series assembly iteration as well as its domestic original manufacture location. Some of the other important hardware details embedded in the IS220PAICH1B functional product number include this IS220PAICH1B device's:
- PAIC functional product acronym
- Conformal PCB coating style
- Group one Mark V Series product grouping
- B-rated primary functional revision
