ABB FOX61 Series User Manual

Contents

ABB FOX61 Series User Manual Manual pdf 17 page image

I N S T A L L A T I O NFOX61xLEDE1 17Pins without a signal designation are not connected.Please note:The cables provided by ABB are internally connected for 120 Ω (pins a, b).Please note:In transmit direction the b signals are available on three pins per port.→ Avoid unintentional connections to the pins with the redundant out-puts.Risk of operating trouble!E1 ports which are not connected at the remote end of the cable can causecross talk.Cross talk onto such an open-ended cable can cause spurious alarms.→ Set the administrative state of these ports to “down”.4.4.2 8 x 2 Mbit/s cable 120 ΩThe 8 x 2 Mbit/s cable for 120 Ω symmetrical termination interfaces each E1port of the LEDE1 unit. It is an open ended twisted pair cable. The wires ofthis cable have to be terminated in an MDF provided by the customer. Thelength of the cable can be specified.Latching clips must be used to secure the cable to the LEDE1 front connec-tor.For details on LEDE1 cables, please refer to "1KHW002498 FOX61x Electri-cal cables".4.4.3 8 x 2 Mbit/s 75 Ω terminationThe 8 x 2 Mbit/s 75 Ω asymmetrical termination consists of a 120 Ω symmet-rical cable and an external impedance converter.Latching clips must be used to secure the cable to the LEDE1 front connec-tor.For details on LEDE1 cables, please refer to "1KHW002498 FOX61x Electri-cal cables".4.4.4 Fixing the cables to the cable trayWhen operating the LEDE1 unit in a FOX615, the cable must be attached tothe cable tray as shown in the Figure 4.Table 4: Pins of the E1 portsPin label Descriptiona Signal “a” for symmetrical cables (120 Ω signal termination)b Signal “b” for symmetrical cables (120 Ω signal termination)Table 5: Wiring of the E1 portsWiring Terminationa, b 120 Ω signal termination