User Manual

connected to a stable Earth ground. Alternatively, two each of two-electrode configurations
can be used (contact manufacturer for details). Table 25 provides a list of three-electrode
Gas Discharge device manufacturers.
Table 25. Manufactures of Suggested Gas Discharge Arresters
Vendor and Configuration Series Voltage
Sankosha, 3 Electrode
www.sankosha-usa.com/arresters.asp?id=2
3H or 3P 90 VDC
Citel, 3 Electrode
www.citelprotection.com/citel/gas_cover.htm
BT, BTR, or BTS 90 VDC
Littelfuse, 3 Electrode
www.littelfuse.com/series/PMT8.html
PMT8 90 VDC
Figure 35 shows a typical outdoor twisted pair network in which Gas Discharge arresters
have been incorporated.
Figure 35. Network and Shield Lightning Protection
When the network data line extends outside of a building or grounded structure, every FT
6000 Smart Transceiver or Neuron 6000 Processor device on the network segment, whether
located indoors or outdoors, must be equipped with surge protection circuitry. Additionally,
protection devices must be added to the network at every point where the network cable exits
the building or structure.
Series 6000 Chip Data Book 87