Overview
Configured for isolated differential voltage signal acquisition in Triconex Safety Instrumented Systems, the Invensys Triconex 3703E (3703E Analog Input Module) provides direct physical signal processing execution for 16 channel analog measurement circuits. The module supports 0-5 VDC and 0-10 VDC input ranges with Triple Modular Redundant (TMR) architecture.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3703E |
| Spare Model | 7300112-010 |
| Brand | Invensys Triconex |
| Product Type | Analog Input Module |
| Origin | USA |
| Weight | 2.55 kg |
| Dimensions | 2.2 x 40.8 x 40 cm estimated shipping size |
| Operating Temp | 0 deg C to 60 deg C accuracy range |
| Power Consumption | Not specified |
| Input Points | 16 differential isolated channels |
| Input Voltage Range | 0-5 VDC or 0-10 VDC, +6% over-range capability |
| Input Update Rate | 50 ms |
| Resolution | 12 bits |
| Accuracy | Less than 0.15% of FSR from 0 deg C to 60 deg C |
| Input Resistance | 30 Mohm minimum DC |
| Power-Off Resistance | 30 Mohm minimum DC |
| Common Mode Range | +200 V peak |
| Leg-to-Leg Isolation | 20 kohm typical |
TMR Safety Isolation and Signal Processing
The Triconex 3703E operates within the Tricon TMR safety platform and processes analog voltage signals through isolated input channels. Each channel uses differential measurement technology to reduce common-mode interference and maintain signal separation.
Furthermore, the module supports galvanic isolation between field circuits and control electronics. The isolation structure enables controlled signal acquisition for safety applications requiring SIL3 level system design and fail-safe state execution.
The 3703E integrates TMR 2oo3 architecture principles, allowing redundant processing paths and continuous diagnostic evaluation. Channel monitoring functions identify input faults and support system-level fault handling through the Tricon controller.
Frequently Asked Questions
Q: Does the Triconex 3703E support isolated analog input measurement?
A: Yes. The 3703E provides 16 differential isolated analog input channels for voltage signal acquisition.
Q: What input voltage ranges are supported by the 3703E?
A: The module supports 0-5 VDC and 0-10 VDC input ranges with +6% over-range measurement capability.
Q: Does the 3703E use TMR architecture?
A: Yes. The module is designed for Triconex TMR systems and supports redundant signal processing with diagnostic monitoring.
Field Installation Guidelines
Install the 3703E module in the designated Tricon chassis slot and verify correct mechanical engagement with the backplane connector.
Use shielded field wiring for analog input circuits. Connect cable shields according to the system grounding specification to reduce electrical noise and signal interference.
Separate analog signal wiring from high-current power cables and switching circuits. Verify field polarity before applying voltage signals to the input terminals.
Confirm TriStation configuration parameters before commissioning, including input range selection, channel assignment, and diagnostic status verification.
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