ABB G3HM HENF331048R0005 PCM Interface Module

G3HM HENF331048R0005 PCM Interface Module

The PCM interface type G3HM (PCM = pulse code modulation) can be programmed for contra directional or codirectional operation at a data transfer rate of 64 kBit/s.

Contra directional interface (CCITT G.703)

Contra directional operation requires 4 pairs of conductors. Two of the pairs are used for transmit ing the combined signal for octet and bit clocks (8 kHz + 64 kHz) from the PCM multiplexer to the PCM interface(G3HM).The other two pairs convey the 64 kBit/s data signals.

Codirectional interface (CCITT G.703)

A codirectional interface only requires two pairs of conductors instead of the four needed by a contradirectional scheme. Each pair is used to transfer a combined data and clock signal between the two sets of terminal equipment. The combined signal comprises a 64 kBit/s information signal, a 64 kHz bit clock and the 8 kHz octet clock. The symbol rate of the combined clock/data signal is 256 kBaud.

The signals are coupled into and out of the equipment by isolating transformers such that only the voltage difference between the cores is processed. Thus the influence of common mode interference on signal evaluation depends on the degree of longitudinal balance.

Technical Specifications

100% brand new and original,All the goods will be tested before shipment.

For the in stock items, we will send the order out within 5-7 days after receive the payment.

Global supplier of quality automation and control components.

Topteng offers a 12-month warranty from the date of delivery.

In the event of non-conforming product ( if damaged or incorrect product is received ),

Any nonconformity must be reported within 7 days of receipt of goods.

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