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7
MULTIPLE UNIT INSTALLATIONS
Any of the four basic operation modes (Shared Line, Dedicated Line,
Intercom, and Ring Down) may be used with multiple RE-2s. The
telephone line wiring is “daisy chained” (the telephone line routes
through one unit to the next) as shown below. Always connect the
telephone line + to TIP, and - to RING.
The Telephone Bypass Module only performs the bypass function
in the Shared Line Mode, but it will provide extra electrical surge
protection in all modes. A surge on the TELCO terminals will be
suppressed through the EARTH GROUND terminal. Always use
separate AC transformers to power each RE-2.
When multiple units are connected together, only two units can be
controlled by resident telephone commands, and only one unit
can be programmed to answer the telephone (PPN #33) for remote
telephone commands. Remote programming via computer is not
supported when using multiple RE-2s.
Command Prefi x for Multiple Units
Programming and relay control may be through the individual RE-2
keypads or through the house telephone(s) when using the Shared
Line or Intercom Modes. To support using the house telephone(s)
to issue commands, each RE-2 must be programmed to a different
“command prefi x” (PPN #72).
• Set one unit’s command prefi x to
• Set the other unit’s command prefi x to
In the case of simultaneous visitors at different units when using
the Shared Line Mode, putting one RE-2 “on hold” to communicate
with the second RE-2, then returning to the fi rst RE-2 is not
recommended. Instead, fi nish all communications with the fi rst RE-2
before servicing the second RE-2. Simultaneous visitors at multiple
units used on a single line wired in the Ring Down Mode will cause
a “conference call” effect between units
Figure 10. Multiple Unit Wiring
TIP
RING
TIP
RING
TIP
RING
TIP
RING
TELCO
RE-2
TELCO
RE-2
HOUSE
HOUSE
TELEPHONE
BYPASS
MODULE
EARTH
GROUND
GROUND
STAKE
FIRST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
LAST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
FROM
TELEPHONE
COMPANY
TO
HOUSE
TELEPHONES
GROUND
STAKE
GROUND
STAKE
TIP
RING
TIP
RING
TIP
RING
TIP
RING
TELCO
RE-2
TELCO
RE-2
HOUSE
HOUSE
TELEPHONE
BYPASS
MODULE
EARTH
GROUND
GROUND
STAKE
FIRST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
LAST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
TO
INTERCOM
TELEPHONES
GROUND
STAKE
GROUND
STAKE
SHARED LINE
MODE
INTERCOM
MODE
DEDICATED LINE
MODE
RING DOWN
MODE
PROGRAM THIS
RE-2 UNIT ONLY FOR
"INTERCOM MODE"
(PPN #52)
DO NOT CONNECT
TO A LIVE TELEPHONE LINE
TIP
RING
TIP
RING
TIP
RING
TIP
RING
TELCO
RE-2
TELCO
RE-2
HOUSE
HOUSE
TELEPHONE
BYPASS
MODULE
EARTH
GROUND
GROUND
STAKE
FIRST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
LAST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
FROM
TELEPHONE
COMPANY
OR PBX
GROUND
STAKE
GROUND
STAKE
PROGRAM ALL
RE-2 UNITS FOR
"CALL FORWARDING"
(PPN #54)
TIP
RING
TIP
RING
TIP
RING
TIP
RING
TELCO
RE-2
TELCO
RE-2
HOUSE
HOUSE
TELEPHONE
BYPASS
MODULE
EARTH
GROUND
GROUND
STAKE
FIRST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
LAST
RE-2
ENTRY
SYSTEM
TELCO
RING
TIP
RING
TIP
EARTH
HOUSE
CASE
GROUND
FROM
PBX
GROUND
STAKE
GROUND
STAKE
PROGRAM ALL
RE-2 UNITS FOR
"RING DOWN MODE"
(PPN #54)
IF DESIRED, CHANGE
RESIDENT RESPONSE KEYS
(PPN #71)