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MDS 05-2818A01, Rev. C
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Internal Current Source Keying
Another keyline option is to use the on-board 12 volt DC supply. This is done
by adding a jumper from TB1 Pin 7 to Pin 12. TB1 Pins 8 and 11 should then
be connected to the keyline relay contacts. (See
3.)
Manual Keying Button (for test purposes)
A red pushbutton switch, SW1, is provided on the Interface/Utility Board to
key the transmitter manually when desired. This is intended for use during ini-
tial setup and testing of the packaged system.
The Transmit Test Key, SW1, on the Interface/Utility Board is
NOTE:
non-functional with MDS iNET or TransNET radios.
Additional Interface Connections
Two unique outputs are provided on TB1 for custom applications: AC power
failure alarm, and the transceiver's Received Signal Strength Indication
(RSSI).
AC Alarm —Pin 9
H = AC Present—Approximately 11 Vdc through a 1 K
resistor
L = AC Failure—Ground through a 1 K resistor
Received Signal Strength Indicator (RSSI)—Pin 10
Same as transceiver's RSSI output. It pr o vides a DC volt a ge proportional to the
received signal strength. The range is approximately zero to five volts DC
through a 10K current limiting resistor. Refer to the transceiver manual for
additional RSSI information.
For MDS iNET and TransNET Radios
The Orderwire and Diagnostic connectors on the Interface/Utility Board are
not used when MDS iNET or TransNET radios are installed. Orderwire and
diagnostic connections must be made directly at the radio, using appropriately
wired connectors. Refer to the transceiver manual for pinout information.
The TransNET's Sleep and Alarm lines are not carried onto the P-60 terminal
strip, J1/TB1. If these functions are required, make the connection directly at
the radio, using an appropriately wired connector.
Two interface cables are packed inside each P-60 when an MDS iNET or
TransNET radio is installed. The proper cable must be identified by the user
and installed between the radio's DB-9 data connector and J2 on the Inter-
face/Utility Board.
• The 03-2848A01 cable is for use with an iNET radio's COM2 port.
• The 03-2876A01 cable is for use with either a TransNET radio, or an
iNET radio's COM1 port.
P-60 units with an MDS iNET transceiver installed include an Ethernet Tran-
sient Protector that is mounted at the bottom of the enclosure. A heavy ground
wire (green) extends between the stud on the protector, and the P-60's ground
point.
MDS P-60/P-60 HL Reference Manual
Figure 10 on Page
22, example
21
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