Invensys 8310 120 VAC/VDC Power Module

Overview

Configured for converting incoming 120 VAC/VDC line power to a regulated 6.5 VDC secondary supply within the Tricon safety system, the Invensys 8310 (8310 120 VAC/VDC Power Module) provides direct electrical power conversion for Tricon controller modules. Each chassis uses two power modules, and either module can carry the full documented load.

Hardware Specifications

Tricon Power Redundancy and Electrical Characteristics

The 8310 supplies the 6.5 VDC secondary power required by Tricon controller modules. The chassis uses two power modules, and each module has sufficient capacity to carry the full documented load under the specified conditions. Therefore, the power modules provide a redundant supply arrangement at the chassis level.

The module accepts a recommended nominal input of 120 VAC/VDC with a -15% to +10% range. The extended range is 85-140 VAC or 95-180 VDC. For AC operation, the specified input frequency range is 47-63 Hz.

The input circuit provides 1000 VAC or 1500 VDC input-to-output isolation. In addition, the module uses a 5 A time-delay input fuse. Its typical power factor is 0.70, while the typical crest factor is 2.5.

The secondary output is 6.5 VDC with a tolerance of +/-1%. The rated output current is at least 27 A at 60 deg C ambient, corresponding to a 175 W output power rating under the stated thermal condition. The output over-current limit is typically 135%, followed by automatic restart.

Frequently Asked Questions

Q: Can either 8310 power module carry the complete chassis load?

A: Yes. The supplied specifications state that each of the two chassis power modules can carry the full load under the documented operating conditions.

Q: What input source capacity is required for an 8310?

A: The specified minimum input source capacity is 240 W per power source.

Q: What happens when the 8310 reaches its output over-current limit?

A: The output over-current limit is typically 135%. The module provides automatic restart after the over-current condition.

Field Installation Guidelines

Verify the installed chassis configuration before replacing an 8310. Confirm the input source type, available source capacity, input voltage range and secondary supply requirements against the system documentation.

Disable the incoming power to the module being removed before disconnecting or replacing the unit. Confirm that the electrical source is de-energized before handling the power connections.

Maintain correct separation between incoming power wiring and low-voltage control or signal wiring. Route conductors according to the installed Tricon chassis and cabinet wiring practices.

Verify input polarity and terminal identification when using DC input. For AC input, verify the supply voltage and frequency before energizing the module.

After installation, check the 6.5 VDC secondary output and confirm that the redundant power arrangement operates according to the chassis design. Also verify that the connected load remains within the specified 175 W output rating at the applicable ambient condition.

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