Motorola ACE3600 RTU Owner's Manual page 363

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RS232-E+ adaptor (#0189968V34) as in Connection to TETRA Radio below.
The asynchronous adaptor (#0189968V32) ends with the male 9-pin D-type connector. The
port may be defined either as a MDLC protocol port or as a User port.
The signals that appear on the male 9-pin D-type (or 25-pin) connector are according to the
RS232 standard – see the following table. In this case, the RTU serves as DTE (Data Terminal
Equipment).
RS232 Function
TX-DATA
RX-DATA
RTS
CTS
GND
DTR
DCD (Rec line)
To extend the cable, you may use any extension cable with male and female D-type connectors
(connected pin-to-pin, not crossed).
Before transmitting, the RTU sends RTS=ON to the modem, and waits for CTS=ON from the
modem as a condition for transmitting.
The RTU will receive data from the modem only when DCD=ON.
When using a modem in auto-answer mode (connected to a Computer port) for remote service,
the RTU does not support RTS/CTS protocol since the port is designated to operate with a
local computer as well as with a modem.
For modems which support RS232-E, use either the RS232-E adaptor (#0189968V33) as in
Connection to IDEN Radio below, or the RS232-E+ adaptor (#0189968V34), as in Connection
to TETRA Radio below.
Connection to GPS Receiver
When an off-the-shelf GPS timing receiver is purchased (e.g. Synergy SynPaQ/E PPS Sensor
with M12+, Garmin NMEA 2000), the data and power cable for that receiver should be
purchased as well.
Connect the data wire of the cable to the CPU port using the ACE3600 asynchronous RS232-E
adaptor cable. The port should be defined as a GPS receiver port (RS232, Async).
Connect the power wire of the cable to a cable with the following connectors:
RTU side: The connector should fit the auxiliary power connector on the ACE3600 power
supply module.
GPS Receiver side: The connector should fit the power connector on the GPS receiver cable.
8-pin 25-pin Male
Connector(on
RTU)
1 →
2
2 ←
3
6 →
4
3 ←
5
4 7
8 →
20
5 ←
8
C-3
Appendix C: Accessories, Adaptors and Cables
9-pin Male
3
2
7
8
5
4
1
Direction
from RTU
to RTU
from RTU
to RTU
-
from RTU
to RTU