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Page 2-7
INSTALLATION INSTRUCTIONS! CONTINUED
INSTALLATION OF RY 15 RELAY INTERFACE UNIT,Continued
and each connector uses the following code:
DATA
CHANNELS
RAISE
LOWER
COMMON
POS.
NEG
- - -
1,4,7,10,13
1
2
3
4
5
2,5,8,11,14
6
7
8
9
10
3,6,9,12,15
II
12
13
14
15
The five connectors for a RY 15 are all interchangeable.
The harness wires
to user equipment should be carefully soldered to the plugs, with sleeving over
each terminal ta reduce chance afShorting adjacent pins.
After attaching all
necessary wires ta a given connector, bundle the wires together and tape
Or
tie
them to reduce strain on individual pins.
The contacts 1n each plug are recessed
to reduce chance of shorting when disconnected from the RY 15.
The connections for channel ZERO are found On the terminal strip and have the
same numerical key as the pins for channel one.
Channel zero may be used as a con-
trol and data channel, but remember that the telemetry is normally off on that channel.
CHANNELS 1-15 PROGRAMMING MODE--Each group of tbree channds is isolated for
use
~n
single channel selection programming schemes.
In such a configuration, the
source voltage is connected to pin 16 and the command leads are attached to plns 3,8,
and 13 respectively for the three channels.
CHANNELS 1-lS RAISE/LOWER MODE--Ta enable the RAISE and LOWER functions for a
given set of three channels found on the same connector, connect pin 16 of that
connector to terminal strip position 6.
The circuit in this mode goes through the
fuse found on the front panel of the RY 15.
Channel zero raise/lower circuits are
already internally connected to the relays.
VOLTAGE SAMPLE INPUTS--Channels ZERO through 15 each have an input pair for DC
VOltages.
See the table below for positive and negative identified pins for COnnec-
tion.
Reversing the leads will cause a negative reading which may be desired
10
reading specified voltages.
The sample should be between 2 and 2.5 volts for full
scale readings of up to 1999, positive or negative.
If the proposed
sampl~
is too
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