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Settings and
Connections
Refer to Figure 3 when
making physical connections
to the RCM8. Refer also to
Appendix B to define the
application you wish to install.
EIA-485
EIA-485
Master/Slave
Baud
3
OFF
ON
OFF
M
S
9600
To connect the RCM8:
1. Set the SW1 DIP Switches as described in the tables below:
Switch
RCM8 (Input #)
1 (1-8)
2 (9-16)
3 (17-24)
4 (25-32)
Latching
Alarms
4
5
ON
OFF
ON
1200
OFF
ON
DIP Switch SW1 Descriptions
Address (1 and 2)—Addressing allows up to four RCM8
units to be linked together. Overlapped addresses are
allowed only for dial-up operation without SiteScan.
EIA-485 Master or Slave (3)—If ON, the Master unit polls
the EIA-485 Slaves and has dial-out capability for the
connected units. For Slave units at the ends of each EIA-485
string, set P4 jumper to IN. For all other units, set the P4
jumper to OUT. Modems do not directly attach to slave
units.
EIA-485 Baud (4)—9600 baud works for most multiple-
unit applications. If communications are not working: check
cable distance; check for a noisy communications
environment; or try using 1200 baud.
Latching Alarms (5)—When ON, alarms will not clear
until the Silence/Reset switch is pressed and held for two
seconds.
Repeater (6)—A repeater RCM8 unit is connected at a
different location to echo alarms received by the primary
unit(s). When ON, the eight inputs of the repeater unit are
disabled and the display echoes incoming alarms. Master
repeaters display all alarms. Slave repeaters display alarms
only from RCM8 with a matching address.
SW1 Switches 1 and 2—Address
1
OFF
ON
X
X
X
X
Terminal
Repeater
Baud Rate
6
OFF
ON
OFF
OFF
ON
1200
Section 2: Installation
2
OFF
ON
X
X
X
X
Alarm Relay
(Silence/Reset)
7
8
ON
OFF
ON
2400
OFF
ON
Liebert RCM8 7
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