Encoder Installation
44
025-9567E
Table 13. Typical Microphone Replacement Connection Scheme
Pin Label
Connection
P1-8
AUDIO N.C. A
from console microphone
P1-9
AUDIO COM. A
to console audio input
P1-7
AUDIO N.O. A
connect to P2-3
P2-3
TONE OUTPUT 1A
connect to P1-7
P2-4
TONE OUTPUT 1B
connect to P1-11
P1-11
AUDIO N.O. B
connect to P2-4
P1-10
AUDIO COM. B
to console audio input
P1-12
AUDIO N.C. B
from console microphone
Auxiliary Panels
The connection between the Model 25 encoder and the auxiliary instant call panels is done
via the signals labeled “LOOP INPUT” and “LOOP OUTPUT”. The loop uses RS-232C
compatible signals and an ASCII asynchronous serial communications protocol. Both the
encoder and auxiliary panels have the loop connections. When wired together, the system
forms a daisy chain where the “LOOP OUT” of one panel feeds the “LOOP IN” of the next.
If no auxiliary panel is used then the “LOOP OUT” and “LOOP IN” signals of the encoder
are connected together at the back panel. If the loop connections are not made then when the
encoder is powered on, it will detect and report the condition as an error.
The use of shielded cable is strongly recommended for the interconnection between panels
since the electrical signals may radiate some radio interference. The distance of cable
between panels should be no greater than 30 meters (100 feet). The details of installing the
auxiliary panels may be found in the “AUXILIARY PANEL INSTALLATION” section
starting on page 51.
Power
Four connections are provided for the encoder power; two for +12 volts DC and two for
ground.
The conductors from the power supply should be 18 gauge or thicker. The power conductor
pair should be either tightly twisted or shielded to prevent any possible radio interference
from being radiated from the wires. Before power is applied, all other encoder connections
(except the computer port) should be completed. The encoder re11 to +14 volts DC
at a maximum current of 2.5 amps. When idle, the encoder will typically draw less than 1
amp. If power drops between 9.5 and 11 volts, the encoder will retain its current operating
mode but any encoding tones generated may be greatly distorted. If power drops below 8
volts, the encoder will automatically become reset and all operations will halt until the power
rises above 10 volts.
Note:
It is imperative that the encoder system be properly grounded to the console
system. If this precaution is not taken, the encoder may behave erratically.
Содержание Model 25
Страница 1: ...Model 25 Programmable Encoder Product Manual 025 9567E...
Страница 2: ......
Страница 16: ...Specifications 8 025 9567E...
Страница 36: ...Operation 28 025 9567E RELAY TIMING DIAGRAM...
Страница 62: ...Auxiliary Panel Installation 54 025 9567E...
Страница 72: ...Troubleshooting 64 025 9567E...