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GENERAL:
Series 60 Reed Relays meet the exacting requirements for
low level, low thermal EMF, input devices for data acquisition systems.
Series 60 Reed Relays do not contribute any substantial self-generated EMF
to the circuit to which they are connected. Careful selection of preconditioned,
dynamically tested reuthenium contact switches form the heart of the Series
60. Series 60 relay contacts do not stick or miss when operated within TTL or
thermocouple voltage ranges. Proprietary construction techniques and epoxy
formulation assure a uniform thermal EMF offset relay to relay with a high IR of
10 to the 12th ohms (standard). Higher IR available upon request.
SPECIAL:
Copper pins exiting from the Series 60 relays from all
switch connections assure a minimum thermal EMF junction at the printed circuit
board connection. The copper pins are connected to the reed switches via a
weld process. Solder is not used, except for the coil leads. Degradation of
insulation resistance under conditions of high humidity and temperature due to "ion
travel" cannot occur with the Series 60 relays.
OFFSET:
Maximum thermal offset for Series 60 relays is 1 microvolt.
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| CONTACT RATINGS @ 20 DEGREES C. |
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CONTACT
FORM |
MODEL
NUMBER |
NOMINAL
COIL V. |
COIL RES.
OHMS |
PICK UP
VDC |
BOTTOM VIEW |
| 2A |
60-10 |
5 |
350 |
3.8 |
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| 60-20 |
12 |
2000 |
9.0 |
| 3A |
60-30 |
5 |
350 |
3.8 |
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| 60-40 |
12 |
2000 |
9.0 |
| 3A |
60-50 |
5 |
350 |
3.8 |
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| 60-60 |
12 |
2000 |
9.0 |
| NOTE: Switches connected to pins 5-6 and 7-8 are the low thermal switches.
All relays are magnetically shielded. Unused terminals are omitted. |
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| PHYSICAL LAYOUT |
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| INITIAL CONTACT RESISTANCE |
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| The maximum initial contact resistance of all Series 60 Reed Relays, contact
to contact, is .10 ohms. Contact resistance can be expected to remain under
.03 ohms throughout life provided the current and voltage is under that
normally encountered from TTL circuitry. |
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| CONTACT MISS-STICK PERFORMANCE |
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| Series 60 relays, when operated at current and voltage loads normally found
with TTL or below circuitry, can be expected to operate without sticking
through tens of millions of operations. Under the same operating conditions a
"miss" normally does not occur. |
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| TESTING PROCEDURES |
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| Normal incoming inspection procedures regarding pick up, drop out and
contact resistance apply to the Series 60 relays. However, the contact current
and voltage applied to the relay under test should not exceed those normally
encountered under TTL conditions. Testing for the more exacting thermal offset
performance requires specialized testing techniques not normally available to
the user. EAC will provide thermal testing information to the user upon written
request. |
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| REED RELAY RELIABILITY PROGRAM |
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Rigorous pretesting of the reed switch under actual low-level operating
conditions is just the first step in EAC's efforts to build the most reliable
Reed Relays in the industry. Our coils, for example, must pass no less than
three inspections prior to reaching final assembly. In addition, each major
construction operation is monitored by experienced inspectors who take pride in
helping produce the most reliable relays possible.
Our engineering department is replete with the latest design and testing
equipment to include two environmental chambers to duplicate the exact
temperature and humidity conditions normally encountered by the Series 60.
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| CUSTOM SERIES RELAYS |
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| Specialized requirements such as high insulation resistance under adverse
environmental conditions, contact to contact high voltage standoff, mercury wet
contact construction, and other items are available to the user upon request.
Merely contact the factory or the local sales representative. |
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| QUALITY CONTROL PROGRAM |
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| 100% switch testing and subsequent 100% final testing of all relays
manufactured by EAC is patterned after MIL-Q-9858B. QC meets all requirements
of MIL-I-45208. MIL-R-5757 test methods are used. Static and dynamic
operational and contact resistance checks are made to assure each EAC Reed Relay
conforms to specifications. Series 60 relays are preconditioned to reduce to
minimum any failures normally attributed to contact resistance variations
(normally called early life failures). |