chromatec ALARMS-xx Series Setup Manual - Halaman 6

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Chromatec

Cascading Multiple ALARMS-xx

via RS422

Once the first ALARMS-xx has been connected to the AM-xx / MADI-xx, any additional alarm units

may be cascaded from the first, by means of a pin-to-pin RS422 cable. The 'DATA OUT' port of the

first unit is connected to the 'DATA IN' port of the second unit. Alarm data for all AM-xx / MADI-xx

channels is passed by these ports, so it is only necessary to set the ALARMS-xx DIP switch to the

desired channel group.

Refer to the following table for details of the connections for cascading additional ALARMS-xx units

(serial ports are all female 9-pin D-Sub types):

Signal

GND

RX+/RX-

TX+/TX-

RX-/RX+

TX-/TX+

Notes:

1) If required, the same alarm status information may be relayed to different areas via multiple

ALARMS-xx units by setting the DIP switches of cascaded units to the identical channel groups.

2) All ALARMS-xx units in the same system must be connected either via RS422 or LAN and not by a

combination of the two methods.

ALARMS-xx

ALARMS-xx DATA IN

4, 5, 9

ALARMS-xx DATA OUT

4, 5, 9

Version 1.0