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1260-21 User Manual
Specifications 1-6
Racal Instruments
©
2005
For example, under a given condition of 10 A switched current, 10
cycles/hour switch rate, and 30°C ambient temperature, MTBF is
calculated to be 280,000 hours.
The most important factor is the maximum switching capacity,
which is an interrelationship of maximum switching power,
maximum switching voltage and maximum switching current.
When a relay operates at a lower percentage of its maximum
switching capacity, its life expectancy is longer. The maximum
switching capacity specification is based on a resistive load, and
must be further de-rated for inductive and capacitive loads.
For more details about the above life expectancy factors, refer to
the data sheet for the switch plug-in module.
The relay used on the 1260-21 plug-in is Racal part no. 310314-
001. The relay manufacturer’s specifications for this relay are:
Life Expectancy
Mechanical
5,000,000
operations
Electrical
10,000 operations at full rated load
(resistive)
For additional relay specifications, refer to the relay manufacturer’s
data sheet.
Ordering
Information
Listed below are part numbers for the 1260-21 switch module. The
1260-21 uses a single type of mating connector.
ITEM DESCRIPTION
PART
#
1260-21 Switch Module
w/o – 01T
12 Channel, 10 A SPDT Power Switch
Consists of:
405233 PCB Assy.
1260-21
manual
408004
405233
980673-065
Option-01T Option-01T
(installed)
Option-01T (spare)
Instruction Manual for Option-01T
(Must be added w/ Option-01T installed)
OPT-405108-001
407531-001
980806-999
1260-21 Connector Mating Kit
Consists of:
3 16-pin mating connector shells
54 female connector pins
407917
Additional Manual
980673-065