Overview
Configured for discrete signal monitoring in the Emerson Ovation Distributed Control System, the Emerson 1C31238H01 (1C31238H01 Digital Input Module) provides direct physical and electrical input processing. The module receives ON/OFF field states from switches, relays, and compatible discrete devices and transfers the resulting status information to the associated Ovation I/O architecture. This part number is identified as a P-MOD base cover and has been discontinued by the manufacturer.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1C31238H01 |
| Brand | Emerson |
| Series / Platform | Ovation Distributed Control System |
| Product Type | Digital Input Module |
| Input Signal Type | Discrete ON/OFF signals |
| Input Channels | Multi-channel configuration; exact channel count depends on the associated system sub-assembly |
| Nominal Input Voltage | 24 VDC |
| Input Impedance / Current | Approximately 10 kOhm / approximately 2 mA |
| Isolation | Up to 500 V RMS, channel-to-channel and channel-to-ground, as provided in the supplied specifications |
| Response Time | Less than 1 ms for state changes, as provided in the supplied specifications |
| Operating Temp | -40 deg C to +70 deg C |
| Storage Temp | -55 deg C to +85 deg C |
| Relative Humidity | 5% to 95%, non-condensing |
| Weight | Approximately 0.3 kg |
| Dimensions | Approximately 12.1 cm x 6.3 cm x 16.5 cm |
| Mechanical Identification | P-MOD Base Cover |
| Manufacturer Status | Discontinued by manufacturer |
| Compliance | CE, UL, CSA, and RoHS compliance listed in the supplied specifications |
DCS Channel Isolation and Discrete Signal Processing
The Emerson 1C31238H01 processes discrete field states as electrical ON/OFF conditions within the Ovation I/O environment. The supplied specifications identify channel-to-channel and channel-to-ground isolation of up to 500 V RMS. This isolation arrangement helps separate field-side signal paths and limits the transfer of electrical disturbances between connected circuits.
The module is intended for discrete input monitoring rather than analog signal measurement. Therefore, field wiring should maintain separation between digital input circuits and higher-noise conductors. In addition, shield termination and grounding practices should follow the applicable Ovation cabinet and site electrical documentation.
Frequently Asked Questions
Q: What type of field signals does the Emerson 1C31238H01 process?
A: The 1C31238H01 is specified as a Digital Input Module for monitoring discrete ON/OFF electrical signals from devices such as switches, relays, and compatible field contacts.
Q: Is the exact channel count fixed for the 1C31238H01?
A: The supplied information describes a multi-channel configuration and references up to 16 or 32 channels depending on the associated system sub-assembly. The exact configuration should be verified against the installed Ovation hardware arrangement.
Q: Can the 1C31238H01 be installed with arbitrary field wiring practices?
A: No. Field wiring should follow the applicable Ovation installation documentation. Keep discrete signal wiring separated from high-current or high-noise conductors, and apply grounding and shielding practices required by the cabinet design.
Field Installation Guidelines
Before installation, isolate power to the relevant cabinet or I/O assembly and verify that the 1C31238H01 matches the installed Ovation hardware configuration.
Inspect the module and mating hardware for connector damage, contamination, or mechanical deformation. Install the unit according to the designated slot and mechanical orientation of the associated P-MOD or Ovation assembly.
Route discrete input conductors separately from motor power, switching circuits, and other high-noise wiring where practical. Terminate shields and grounds according to the site grounding scheme and Emerson Ovation installation requirements.
Do not assume hot-swap capability unless the installed Ovation sub-assembly and operating documentation specifically permit replacement under power. After installation, verify field-state indication and system diagnostics before returning the associated control loop or monitored equipment to service.
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