GE Bently Nevada 86517 Operation Manual page 15

Notes for Figure 2.2
1 The accelerometer case is connected to the machine earth and the
differential signal output is isolated. The accelerometer case connects to the
extension cable shield through the cable connector for the hardline cable and
connects to the outer shield for the softline cable.
3 The interface module case must be isolated. Bently Nevada housing, part
number 80808-01 or -02, contains a mounting plate which provides isolation.
Wiring Recommendations:
2 Accelerometer to interface: Use extension cable, Bently Nevada part
numbers 45358-07 and -09, or 83387-xxx, or equivalent.
4 Interface module to monitor; Power, Common, +Velocity, and -Velocity wiring
recommendation: two twisted pairs of stranded 18 to 22 AWG wire with insulating
sheath and 100% shield coverage. 1000 feet (305 metres) maximum. Use Bently
Nevada part number 02101200 or equivalent.
5 Interface module to monitor +/- Accel wiring recommendation: stranded
twisted pair, 18 to 22 AWG, insulating sheath and 100% shield coverage. 1000 feet
(305 metres) maximum.
Shielding:
6 Shields terminate at signal common at the monitor. The jumper between
signal common and 3300 rack chassis should be installed on the Power Input
Module at the rear of the 3300 rack. See the 3300 System Installation Instructions,
(document part number 80172-01).
7 At the interface module the shields connect to the terminals marked CASE
SHIELD. Note that a jumper shunt is installed between the terminal block
mounting screw and the CASE SHIELD terminal.
Section 3 - INSTALLATION
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