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1260-22 User Manual
Module
Configuration
Installation Instructions 2-2
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The 1260-22 is a 40-channel single wire module consisting of 40
individual SPST relay switches. Refer to Figure 2-2 for a block
diagram of the 1260-22. This single relay architecture permits the
1260-22 module to be organized via software in any configuration
from 40 – SPST's to 1 - 40PST or any combination thereof (by use
of the include command) without the use of hardware jumpers.
This is the same as being automatically configurable as a 1-wire,
2-wire, ... n-wire switch.
In addition, by using internal jumpers, the user can configure the
module as a SP2T, SP3T, etc., up to a SP40T switch (i.e. a
multiplexer).
The 1260-22A is a standard configuration of the 1260-22 which
uses internal jumpers to configure the module as 5 - 4x1
multiplexers and 10 - 2x1 multiplexers. Refer to Figure 2-3 for a
block diagram of the 1260-22A.
Provision is made on the PCB to add contact protection devices
such as MOV's or snubbers to each of the relay channels if the
relay contact load is inductive. Some suggested devices include a
Phillips Components P/N 2322-594 Series of varistors. Refer to
Figure 2-1, for a 1260-22 typical Module Relay Channel.
E1A
E1B
IN
One Channel of Forty is shown, with provisions for the
addition of shunt elements and internal jumpers at E-points
Figure 2-1, Typical 1260-22 Relay Channel
Publication No. 980673-055 Rev. A
R101
K1
EADS North America Test and Services
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