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INSTALLATION
(See Figure 3)
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
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.
3. Tighten the screw on the MOM-4
4. Install the REP-1 by sliding it into
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
2) In an NIM-1R network, there
7. Maximum current is 150mA.
8. Use the end of line resistor P/N 140-820150 (120
ohms,
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 2
Figure 3
Basic Repeater—Style 4
4
bottom of the card guide is in the
hole on the MOM-4.
to secure the card guide.
the card guides and firmly seat-
ing it in the card edge connector.
REP-1s between any MXL
module and the MMB,
or
are no more than two REP-1s
between any pair of NIM-1Rs
in the network.
1
/
W). See Figure 2A for further information.
4
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