FOCUS/BBF Channel Modules/Interfaces

Two-wire Voice (V2T, V2W, FXO, FXS)

The V2W and V2T modules provide two-wire voice and modem communication between two locations. Both modules support two channels which are configured independently. They are supplied with RJ-9 jacks and compression-type terminal blocks for connecting telephones or modems. Applications for these modules include ringdown circuits or remote telephone extensions.

Four-wire Voice (V4W)

The V4W module allows for the transmission of audio tones and data, as well as E&M signaling information. Two independent channels are provided on each module. Applications include traditional audio tones for relaying, telemetry or any device that uses a four-wire modem to transmit data (e.g. SCADA RTU)

Protective Relay Interface (PRI, PRS)

The Protective Relay Interface provides four independent programmable bi-directional transfer trip circuits with either solid-state or mechanical contact outputs. These optically-isolated trip circuits are encoded, allowing each one to operate independently without affecting the dependability, security or response time of the remaining circuits. Guard and alarm output contact are also provided on the module. Applications include DTT, PUTT, POTT, Directional Comparison Blocking and Unblocking. Redundancy at DS0 level and multi-drop features are supported.

Contact Transfer (CTR)

The Contact Transfer module provides eight independent bi-directional contact closure circuits. It can take in up to eight contacts and transfer their status to the remote end CTR module. This is ideal for extending the reach of a SCADA RTU for remote alarm indications.

Low-Speed Data (232)

This module provides two independent RS-232 data circuits over which the user can transparently transmit and receive data and modem control signals at speeds up to 19.2Kbps asynchronous. No presetting of data rate is required. The module supports CTS, RTS, DTR and DSR handshake lines. This module is suitable for SEL “mirrored bits” logic.

Current Differential (HCB, SPD)

The current differential module connects directly to HCB, HCB-1 or SPD relays. It monitors the voltage and current of the connected pilot wire locally and transmits this data to the remote relay. Using this module via