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2.3.3 3500 MONITORING SYSTEM
Connect the cable "A" lead to "SIG/A" terminal on the monitor, the "B" lead to
"PWR/B", and the "C" lead to "COM". The terminal connections for the 3500/42
Monitoring System appear in Figure 2-3 and Figure 2-4. Refer to the 3500/42
Operation and Maintenance Manual (part number 129773-01) and 3500 Field
Wiring Diagram Package (part number 130432-01) for further information.
Application Alert: Miswiring the accelerometer to an external power
supply without limiting the current to be less than 15 mA will
permanently damage the accelerometer.
2.3.4 EXTERNAL POWER SUPPLY
Using the 16925 interconnect cable, connect the "B" lead to the " - " terminal of
the power supply and the "C" lead to the " + " terminal of the power supply. The
"A" lead of the cable is the output of the Accelerometer. Turn on the power
supply. Adjust the voltage to -24 ± 0.5 Vdc. Set the current limit of the power
supply to be less than 15 mA. Measure the dc voltage across the "A" and "C" lead.
The voltage should be between -8 and -9 Vdc. If it is not, turn off the power
supply immediately and check for proper connections. The terminal connections
of the external power supply appear in figure 2-4.
x . . R v 0 z R E N S TER
SHIELD
A L A . RELAY OUTPUTS
SIGNAL INPUT
RELAY MODULE
DUAL RELAYS
Figure 2-1 Accelerometer/3300 System Connections Using 16925
RED
BLACK
WHITE
SHIELD (GREEN)
(TO SINGLE EARTH POINT GRID)
Ltt
Interconnect Cable
Section 2 - Installation
CHANNEL A
CHANNEL B
00HC
f t
MACHINE
ACCELEROMETER PIN O U T
MACHINE
7
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