RuggedCom RX1512 - Manual (Page 28)

Chapter 3
Installation
RUGGEDCOM RX1512
Installation Guide
22 Transient Suppression
To ensure reliable, error-free data communications, new and pre-existing communication paths should be verified
for TIA/EIA-568-A compliance. The table: Cabling Categories and 1000Base-TX Compliance summarizes the
relevant cabling standards as they apply to 100Base-TX connections.
Table: Cabling Categories and 1000Base-TX Compliance
Cabling Category
1000Base-
TX Compliant
Required Action
< 5 No New wiring infrastructure required.
5 Yes Verify TIA/EIA-568-A compliance.
5e Yes No action required. New installations should be designed with Category 5e or higher.
6 Yes No action required.
> 6 Yes Connector and wiring standards to be determined.
Follow these recommendations for copper data cabling in high electrical noise environments:
• Data cable lengths should be as short as possible, ideally limited to 10' (3 m) in length. Copper data cables
should not be used for inter-building communications.
• Power and data cables should not be run in parallel for long distances, and should be installed in separate
conduits. Power and data cables should intersect at 90° angles when necessary to reduce inductive coupling.
• Optionally, shielded/screened cabling can be used. The cable shield should be grounded at one single point to
avoid the generation of ground loops.
Section 3.7.4
Transient Suppression
All copper Ethernet ports on RuggedCom products include transient suppression circuitry to protect against
damage from electrical transients and to ensure conformance to IEC 61850-3 and IEEE 1613 Class 1. This
means that during a transient electrical event, it is possible for communications errors or interruptions to occur,
but recovery is automatic.
NOTE
RuggedCom does not recommend the use of copper cabling of any length for critical, real-time,
substation automation applications.
RuggedCom also recommends against the use of copper Ethernet connections to interface to devices in the field
across distances which could produce high levels of ground potential rise (that is, greater than 2500V), during
line-to-ground fault conditions.
Section 3.8
Serial Ports: RJ45
The RX1512 supports serial port line modules with RJ45 connections. On power-up, all serial ports default to
RS485 mode. Each port can be individually set to RS232, RS485, or RS422 mode via software.