Key Features

  • Available as either a 78kbps transceiver or 1.25Mbps transceiver
  • Uses transformers to provide isolation from the twisted pair network bus
  • Provides excellent common mode rejection
  • Reduces susceptibility to ground loops
  • Meets LonMark® interoperability guidelines

Tech Specs

Function

Twisted Pair transceiver

Agency listings

 UL 1950, CSA C22.2 No. 950, TUV EN60950

RoHS compliant

As per the European Directive 2002/95/EC on the use of certain hazardous substances in electrical and electronic equipment

​Supply voltage

+ 5 Vdc + 5%

Typical supply current

10 mA

Data rate

78kbps (TPT/XF-78); 1.25 Mbps (TPT/XF-1250)

Network length

TPT/XF-78 at 1400 meters worst case; TPT/XF-1250 at 130 meters worst case

​Maximum nodes per channel:
  • TPT/XF-78: 64 (0 to 70 deg C), 44 (-40 to 85 deg C)
  • TPT/XF-1250: 64 (0 to 70 deg C), 32 (-20 to 85 deg C); 16 (-40 to 85 deg C)

Network bus length

1,400 m (4,600 ft) for TPT/XF-78 (78kbps); 130 m (430 ft) for TPT/XF-1250 (1.2Mbps)

Network Bus Polarity

Insensitive

​Power-down bus protection

High impedance when unpowered

​Data communications

Transformer-isolated; Differential Manchester encoding

Isolation between network and I/O connectors

 0-60 Hz (60 seconds), 1000 Vrms; 0-60 Hz (continuous), 277 Vrms

​Common mode range

0-60 Hz 277 Vrms

​Electrostatic discharge network connector: :

No errors to 15 KV, no hard failures to 20 KV tested per MIL-STD 883

​EMI shielding

designed to comply with FCC Part 15 Level B and VDE 0871 Level B

​Operating humidity

25 to 90% RH @ 70°C, non-condensing

​Dimensions

38mm x 15mm  x 20mm

​Operating temperature range

-40°C to +85°C

Network terminators

Required at both ends of the network

TPT/XF Twisted Pair Tranceivers Datasheet

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