Configured for high-density temperature data acquisition in the 3500 Machinery Protection System, the Bently Nevada 172103-01 (3500/65 Temperature Monitor I/O Module) provides direct physical/electrical execution. This 16-channel hardware component interfaces field-mounted Resistance Temperature Detectors (RTDs) and isolated-tip Thermocouples (TCs) to transmit real-time thermal measurements across the passive rack backplane.
| Parameter | Specification |
|---|---|
| Model | 3500/65 (Part Number: 172103-01) |
| Brand | Bently Nevada (Baker Hughes) |
| Origin | USA |
| Weight | 0.45 kg |
| Dimensions | 241.3 mm x 24.4 mm x 99.1 mm |
| Operating Temp | -30 to +65 deg C |
| Power Consumption | Logic power supplied via main rack backplane |
| Channel Density | 16 independent channels |
| Input Signal Types | 3-wire/4-wire RTDs (Pt100, Cu10, Ni120); Isolated-tip TCs (Types J, K, T, E, R, S, B) |
| Isolation | 500 Vrms galvanic isolation (Channel-to-Chassis) |
| A/D Conversion | 16-bit resolution |
| Accuracy | Within +-1 deg C typical |
| Update Rate | All 16 channels updated within 250 ms |
The 16-channel architecture relies on cold junction compensation (CJC) algorithms managed at the termination block to maintain measurement linearity across varying ambient conditions. Proper signal conditioning requires precise configuration within the rack software interface to scale specific sensor coefficients. To prevent high-frequency electrical noise from corrupting low-voltage thermocouple microvolt readings, the module incorporates internal cross-talk suppression and a 500 Vrms galvanic isolation barrier, preventing ground loop currents from propagating across adjacent channels during continuous scanning cycles.
Q: Does the 172103-01 I/O module support hot-swap procedures during active rack operation?
A: No. Rear I/O modules do not support hot-swapping while power is applied to the 3500 backplane. Rack power must be isolated prior to removing or inserting this module to prevent transient electrical spikes from damaging the internal 16-bit A/D conversion circuitry or the front-plane monitor card.
Q: How does the module handle a field sensor open-circuit fault?
A: The module executes continuous internal self-diagnostics. If an open circuit is detected on any of the 16 channels, the specific channel status transitions to NOT OK, inhibiting associated alarm logic to prevent a false machinery trip while broadcasting a fault code to the Rack Interface Module.
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