Fault Monitoring/Fan Control Connector - JBL Intellivox-DC115 Installation Manual

JBL Intellivox Installation Manual

FAULT MONITORING/FAN CONTROL CONNECTOR

The pinout of this connector is as follows:
5 4 3 2 1
fig.10.1 - Failure relay / fan control connector
PIN NO. LABELLED
1 COM
2 NO
3 NC
4 +
5 -
Although accessed via the same connector, the fan control
and failure relay functions are independent of each other
and either or both may be used, as required.
24 V
Fan
FAN –
FAN +
To external
FAULT NC
(OR)
fault reporting
FAULT NO
system
FAULT COM
fig.10.2 Fault monitoring / fan control connections
The diagram above illustrates how this connector may
typically be wired.
Please note that Failure Relay and SPL/Temp
sensor connectors are both of the same type,
do NOT interchange!
*Intellivox devices with early serial numbers do not have
the option of re-configuring the volt-free relay contacts
for impedance-sensing operation. Please contact the
service department for more information.
201401/IvxIM_v2.2
or
1 2 3 4 5
USE
Failure relay Common
Failure relay Normally Open
Failure relay Normally Closed
Fan +
Fan -
Intellivox
24 V DC
Fan control
signal
Failure
Relay
Fault Monitoring
The Intellivox includes a single-pole changeover relay
whose contacts are accessible on the Failure Relay
connector. The conditions under which the relay operates
are defined as part of the device configuration in
WinControl. The relay connections may be configured either
as volt-free, or with additional internal resistors to allow
them to be connected directly to impedance-sensing line
monitoring equipment*. This selection is made by moving
an internal PCB jumper, refer to the Appendix for details.
In volt-free operation, COM is connected to NC; a failure
condition causes COM to be connected to NO.
When configured for impedance-sensing use, the
impedance between COM and NC is 10k Ω and open-circuit
between COM and NO in normal operation. When a fault
condition occurs, the impedance between COM and NC
rises to 20k Ω, and COM is short-circuited to NO.
Impedance-sensing fault monitoring equipment may be
connected to COM and NC.
The relay contacts have maximum current and voltage
ratings of 100 mA and 24 V respectively.
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