AMG AMG3788BERN-DR, Instruction Manual

Page: 15 / 18

Each management interface, thus each receiver, has an ID number with is identified below the
management port. This ID number is used by the AMG Network Management System (NMS) to
identify the unit.
The physical interface is a 9 way female D-type connector. It supports either RS-232 or RS-485.
Management Port Pin-out:
Pin
Number
RS-232 Connection RS-485 Connection
1 - Data B (+)
2 RD (data out of port) Data A (-)
3 TD (data into port) -
4 Connect to DTR held –ve or shorted
to ground -
5 SG (signal ground) SG (signal Ground)
6 Alarm Output Alarm Output
7 Alarm Output Alarm Output
8 Alarm reset (Gnd) Alarm reset (Gnd)
9 Alarm reset Alarm reset
For multiple Management Ports it is recommended that the RS-485 interface is used with each RS-485
pair connected in parallel. In this case an RS-485 to RS-232 / USB converter is required in order to
connect to a standard PC Comms. Port.
The time delay between receiving a data request and sending out a response from the port is 625µs.
Therefore any RS-485 converter should have a 'turn around' time or 'transmit dwell' time equal to or
less than 625µs.
Recommended RS-485 Converter's are:
RS-485 to RS-232
Dataforth DCP485-S: Available in the UK from http://uk.farnell.com/ Order No. 300-9348
Settings on the DCP485-S:
ƒ RS-485 Switch Settings: 1-UP, 2-DOWN, 3-DOWN, 4-UP, 5-DOWN, 6-DOWN, 7-DOWN,
8-UP
ƒ RS-232 Switch Settings: 1-DOWN, 2-UP, 3-DOWN, 4-UP
ƒ DCE/DTE set to DCE.
RS-485 to USB
B&B 485USBTB-2W: Available in Europe from http://www.bb-europe.com/ Order No. 485USBTB-2W
Connections to management port:
Management
Port
DCP485-S 485USBTB-2W
1 2 or 4 B+
2 3 or 5 A-
5 GND GND
NOTES:
On the DCP485-S, pins 3 and 5 are connected together and pins 2 and 4 are connected together.
On the 485USBTB-2W, there are 2 pairs of terminals both labeled A-, B+, either pair may be used.
AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
be accurate. No responsibility is assumed by AMG for its use. Page 15 of 18 AMG3788BERN-DR Instruction Sheet
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