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

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.

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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tnerruCeludoMCDV42evitcAAm04

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.

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,

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)

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.

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.

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

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