MXi005U OPERATIONS AND MAINTENANCE
can be connected to maximum 30 VDC output. The active (true) condition whether high or low will depend on the
specific status output.
Figure 6 Remote Status Outputs
2.3.4
2.4
External1
Interlock
There is a pair of terminals on the D-connector that is used for an external interlock to interface to any site alarms or
shutdown conditions. These pins would expect a dry contact that is closed when there is no error condition. This
External #1 interlock is in parallel with the two pin terminal block on the rear of the MXi transmitter chassis. The MXi
applied its own +12V to one side of this interlock (the Ext1+ line) and will sense this +12V on the other interlock side
(the Ext1- line).
REMOTE SIGNAL
PIN#
DESCRIPTION
RC_TXON
1
Control,
Transmitter
ON
RC_VSWRRst
2
Control,
VSWR
Reset
RS_TXON
3
Status,
Transmitter
ON
Spare
[Unused]
4
RT_FwdPwr
5
Telemetry,
Forward
Power
Spare
[Unused]
6
RT_CutBack
7
Telemetry,
Cutback
Voltage
(1/2
Scale)
Ext1-
8
External
Interlock,
Normally
Open
RC_TXOFF
9
Control,
Transmitter
OFF
Spare
[Unused]
10
RS_TXErr
11
Status,
Transmitter
Error
Ground
Reference
12
Ground
Reference
RT_RflPwr
13
Telemetry,
Reflected
Power
RT_AGC 14
Telemetry,
AGC
Voltage
(1/2
Scale)
Ext1+
15
External
Interlock, (+12V Armed)
E
XTERNAL
T
RANSMITTER
I
NTERLOCK
The MXi transmitter provides the customer a set of contacts where an external interlock can be applied to control
the ON state of the transmitter. The purpose of this interlock is to shut down the transmitter if there is sensed an
emergency condition (such as a building fire or smoke alarm) or it there is some RF output switch that is going to
be moved and the RF output of the transmitter needs to be shut off temporarily when the switch is in transit. If
there is no application for this interlock then the customer must insure that it is shorted out (i.e., closed) so that
the transmitter is enabled to be turned ON.
PUB06-76 Rev 2 July 18, 2007
06-76-6
MXi005U Operations and Maintenance