Siemens REP-1 User manual

The Model REP-1 from Siemens Industry,
Inc., is an MXL module that permits the
user to extend the distance of the MXL
RS-485 network as well as the distance of
the NIM-1R RS-485 network. The REP-1
also supports both Style 4 and Style 7
wiring.
The MXL network uses an RS-485 inter-
face for its network wiring. The RS-485
supports up to 32 nodes on each pair of
wires (See Note below).
P/N 315-092686-8
Note: A node is any location where
the network wires are con-
nected to the screw terminals
of an MXL System module.
The REP-1 module reproduces the RS-485
signal on a new pair of wires. The new
signal makes it possible to add more nodes
to the system.
OPERATION
An REP-1 Repeater module may be used to:
Installation Instructions
Model REP-1
Network Repeater Module
Figure 1
REP-1 Repeater PC Board
1. Add nodes to the end of a system
network by providing a repeated
network,
2. Add a Style 4 or Style 7 tap to a
system, or
3. Add a Style 4 tap to a Style 7
network.
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario
L6T 5E4 Canada
INTRODUCTION

2
Basic Repeater Operation
(Refer to Figures 2A and 2B)
The REP-1 has two independent 2-wire
RS-485 repeaters that permit the addition
of another 80 ohms of wire to a Style 4
circuit by using the REP-1 at the end of the
network. When an REP-1 Repeater is in
place, there can be up to 64 nodes on that
network; however, two of the nodes are
used for the repeater module itself.
An REP-1 module uses one node on each
network pair to which it is connected. Al-
though this decreases the 32 available
nodes on a network run, the REP-1 module
adds 31 new nodes on the repeated net-
work.
The REP-1 module occupies one node on
the original network and one node on the
repeated network in both Style 4 and Style
7 wiring.
Adding a T-Tap to a System
(See Figures 2C and 2D)
If an REP-1 module is connected along a
Style 4 or a Style 7 network, the repeated
network can run in a new direction. This
type of setup makes it possible to have a
star configuration on the network.
Converting Style 7 to Style 4 in
a System
(See Figure 2E)
A Style 4 tap can be added to a Style 7
network by using an REP-1 module. This
is helpful when installing RCC-1s and
MOI-1s/7s in a Style 7 system if Style 7 is
not required for those modules.
When an REP-1 is used to add Style 4 to a
Style 7 network, REP-1 connects to two
nodes, thus adding 30 new nodes.
CSG-M Control of System Size
Even though the REP-1 supplies an
increased node count in a system, the total
system size is still controlled by the CSG-M.
This limit guarantees that the MXL System
can support the number of modules installed.
PROGRAMMING
(See Figure 1)
There is one switch (S1) and one jumper
(JP1) on the REP-1 that must be set before
installing the REP-1 in the MOM-4 module.
Setting the Switch on REP-1
The S1 switch on the REP-1 has two
positions available.
• The left-side position (7 to 4) of the
switch enables conversion from
Style 7 to Style 4.
• Select the right-side position
(NORM) of the switch if the REP-1
is used as a repeater.
Selecting the Correct Position
for the JP1 Jumper
The REP-1 provides electrical isolation
between the local power supply and the
RS-485 lines. The JP1 jumper on the
REP-1 has two positions relating to this
feature—PSR and MMB.
•Select the left-side position (PSR) for
the jumper if the REP-1 is installed in
an enclosure with a PSR-1. This set-
ting protects ground fault isolation for
the system. (See CAUTION on the next
page.)
•Select the right-side position (MMB)
for the jumper if the REP-1 is installed
in an enclosure with an MMB so as
to protect ground fault isolation circuits.
For additional information on the MXL/MXLV
System, refer to the MXL/MXLV Manual,
P/N 315-092036.

3
Figure 2
REP-1 Basic Wiring (Including
placement of EOL resistors)
ELECTRICAL RATINGS
E—Conversion from Style 7
to Style 4
*Place a 120-ohm resistor,
P/N 140-820150, where indicated.
B—Basic Repeater--Style 7
D—T-Tap Running in Two
Directions with Style 4
C—T-Tap Running in One
Direction with Style 4
A—Basic Repeater--Style 4
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tnerruCeludoMCDV42ybdnatSAm04
CAUTION
For NIM-1R Network
If a REP-1 is used on a NIM-1R
network, place the JP1 jumper in the
PSR position, no matter in which type
of cabinet the REP-1 is installed.

4
Remove all system power before installa-
tion, first battery and then AC. (To power
up, first connect the AC and then the battery.)
Install the REP-1 in the MXL card cage
Model MOM-4 by inserting the REP-1
board in the desired position.
The MOM-4 is shipped with a card guide in
place for TB1, TB2, TB3, and TB4 on the
MOM-4 board. In addition, an extra card
guide is shipped with the REP-1. Place the
new card guide at the end of the terminal
block chosen for the REP-1 module. To
install the card guide:
1. Loosen the appropriate screw in
the center of the MOM-4.
2.Set the card guide in place, mak-
ing sure the locating pin on the
bottom of the card guide is in the
hole on the MOM-4.
3. Tighten the screw on the MOM-4
to secure the card guide.
4. Install the REP-1 by sliding it into
the card guides and firmly seat-
ing it in the card edge connector.
Checking Limits
Do not connect more than two REP-1s in
series for proper operation of the network.
To be sure there are no more than two
REP-1s in series, check that:
1) There are no more than two
REP-1s between any MXL
module and the MMB,
or
2) In an NIM-1R network, there
are no more than two REP-1s
between any pair of NIM-1Rs
in the network.
FIGURE 2
Figure 3
Basic Repeater—Style 4
Notes:
1. Use 18 AWG minimum wire.
2. Limit maximum resistance per pair to 80 ohms.
3. Use shielded twisted pair.
4. Terminate the shield ONLY at the MMB enclosure.
5. The wiring is power limited according to NFPA 70
per NEC 760.
6. Maximum voltage is 8V P-P.
7. Maximum current is 150mA.
8. Use the end of line resistor P/N 140-820150 (120
ohms, 1/4W). See Figure 2A for further information.
9. Refer to Wiring Specification for MXL, MXL-IQ
and MXLV Systems, P/N 315-092772 revision 6
or higher, for additional wiring information.
INSTALLATION
(See Figure 3)

5
ELECTRICAL CONNECTIONS
Basic Repeater
(See Figures 3 and 4)
A basic repeater connects to the network
at the end of the run. A repeater can ex-
tend the distance of the network or can add
more nodes to the system. If a basic
repeater is in place, the original network
ends at the REP-1 and is terminated with a
120-ohm resistor.
The new repeated network begins at the
REP-1 and also has an end of line resis-
tor. Figure 3 shows the connection for a
Style 4 network. The second half of the
REP-1 is not used in this configuration, so
it has both sides terminated as shown.
For Style 7 networks (Figure 4) use both
halves of the REP-1.
Figure 4
Basic Repeater—Style 7
Notes:
1. Use 18 AWG minimum wire.
2. Limit maximum resistance per pair to 80 ohms.
3. Use shielded twisted pair.
4. Terminate the shield ONLY at the MMB enclosure.
5. The wiring is power limited according to NFPA 70
per NEC 760.
6. Maximum voltage is 8V P-P.
7. Maximum current is 150mA.
8. Use the end of line resistor P/N 140-820150 (120
ohms, 1/4W). See Figure 2B for further information.
9. Refer to Wiring Specification for MXL, MXL-IQ
and MXLV Systems, P/N 315-092772 revision 6
or higher, for additional wiring information.

6
Figure 5
T-Tapping in One Direction (Style 4)
T-Tapping
(See Figure 5)
The REP-1 can be connected anywhere
along a network run to provide a T-tap.
Locate the REP-1 between the two ends of
the primary network and do not use an
EOL device where the primary network
connects to the REP-1.
If, however, the tapped side runs in two
directions from the REP-1, do not use an
end of line resistor. Instead, place the
end of line resistors at the two ends of the
tapped network. For Style 7 networks use
the second half of the REP-1 for the B side
of the network. Repeat this method
when connecting the end of line resistors
on the B side of a Style 7 network.
Converting from Style 7 to Style 4
(See Figure 6)
The REP-1 can be used to provide a Style
4 tap on a Style 7 network. Figure 6 shows
a Style 4 tap that begins at the REP-1. This
tap can also be run in two directions if the
end of line resistors are connected to the
ends of the Style 4 tap. A typical use of this
connection to either an RCC-1/1F or MOI-7
would be for a group of annunciators where
Style 7 wiring is not required for the annun-
ciators, but the rest of the system must be
Style 7. Do not connect the Style 4 tap to
PSR-1s.
Notes:
1. Use 18 AWG minimum wire.
2. Limit maximum resistance per pair to 80 ohms.
3. Use shielded twisted pair.
4. Terminate the shield ONLY at the MMB enclosure.
5. The wiring is power limited according to NFPA 70
per NEC 760.
6. Maximum voltage is 8V P-P.
7. Maximum current is 150mA.
8. Use the end of line resistor P/N 140-820150 (120
ohms, 1/4W). See Figure 2D for further information.
9. Refer to Wiring Specification for MXL, MXL-IQ
and MXLV Systems, P/N 315-092772 revision 6
or higher, for additional wiring information.

7
Figure 6
Conversion from Style 7 to Style 4
Notes:
1. Use 18 AWG minimum wire.
2. Limit maximum resistance per pair to 80 ohms.
3. Use shielded twisted pair.
4. Terminate the shield ONLY at the MMB enclosure.
5. The wiring is power limited according to NFPA 70 per NEC
760.
6. Maximum voltage is 8V P-P.
7. Maximum current is 150mA.
8. Use the end of line resistor P/N 140-820150 (120 ohms, 1/4W).
See Figure 2E for further information.
9. Refer to Wiring Specification for MXL, MXL-IQ and MXLV
Systems, P/N 315-092772 revision 6 or higher, for additional
wiring information.
CONNECT ONLY
TO RCC-1/1F
OR MOI-7

P/N 315-092686-8
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario
L6T 5E4 Canada