3
must be used for transient protection (UL 1459).
Refer to LLM-1 Installation Instructions, P/N 315-
093530.
Modes of Operation
The RCM-1 can operate in the following modes:
Local Mode
The audio from the local MXL
(ACM) will be switched to local
speaker zones (OCCs). The
global audio riser will be
switched to Port C, the Style 4
output riser.
Global Mode 1
The audio output from the local
MXL is disconnected. The
audio from the global riser is
connected to the local speaker
zones and to Port C, the Style
4 output riser.
Global Mode 2
The audio from the local
system is connected to both
the local speaker outputs and
the global risers.
For additional information on the MXL/MXLV
System, refer to the
MXL/MXLV Manual, P/N
315-092036.
Diagnostic LEDs
The RCM-1 has two yellow diagnostic LEDs and
six green diagnostic LEDs along its top edge.
Their functions are described in Table 1 (Refer to
Figure 2 for their location).
PORT STYLE
FUNCTION
A
6
Audio signal input
B
4/7
Audio signal input/output
C
4
Audio signal output
D
6
Audio signal output
The RCM-1 supervises Port B for open and
short circuits, reports by exception to the MXL,
and isolates the fault.
INTRODUCTION
The Model RCM-1 Riser Control module from
Siemens Building Technologies, Inc.provides
control and supervision of global paging risers
in MXL voice networks. The RCM-1 is a double-
width card and has 4 ports (See Figure 1) with
the following inputs and outputs:
Figure 1
RCM-1 Ports
A
D and B
C
B
C and D
A
B, C and D
Only one RCM-1 may be connected to the
MXL. The module communicates with the MXL
using the RS-485 MNET. If the RCM-1 detects
that supervision is lost with the MXL, it will
automatically switch to Local Mode.
If any copper wire pair leaves the building
(Campus Configuration) the LLM-1 module
ELECTRICAL RATINGS
t
n
e
r
r
u
C
e
l
u
d
o
M
C
D
V
5
e
v
i
t
c
A
A
m
0
8
t
n
e
r
r
u
C
e
l
u
d
o
M
C
D
V
4
2
e
v
i
t
c
A
A
m
0
8
1
t
n
e
r
r
u
C
e
l
u
d
o
M
C
D
V
4
2
y
b
d
n
a
t
S
A
m
0
0
2
