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 PC642 Series
RS-485/422 & 232 Circuit
The PC642 Series surge suppressor is a dual-pair (4-wire) module implementing three-stage hybrid technology. This module addresses overvoltage transients with gas tubes and silicon avalanche components. In addition, sneak and fault currents are mitigated with resettable fuses (PTCs). The PTCs increase resistance several orders of magnitude when overcurrents exceed safe levels. A normal state resumes when overcurrents are removed. The ability to self-restore in this manner significantly increases suppressor performance and survivability.
 The PC642 card edge module is gold-plated, double-sided and is designed to mate with the PCB1B gold-plated female terminal connector. When snapped together, the data circuits "pass thru" the protector in a serial fashion from the four "Field Side" terminals to the four "Electronics Side" terminals. Terminals 1 or 10 of the PCB1B must be attached to Building Approved Ground per EDCO Technical Bulletin #2015.
| FEATURES |
| • Lightning Protection for Low-Voltage Data Signal Lines |
| • Three-Stage Protection |
| • Sneak/Fault Current Protection |
| • Resettable Fusing—PTCs |
| • Low-Capacitance Option |
| • Plug-in Module |
| • Fast Response Time |
| • UL 497B Listed |
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TERMINAL ASSIGNMENTS
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SPECIFICATIONS
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| Peak Surge Current (10 times): |
| 8 x 20µs |
10kA |
| 10 x 700µs |
500A per line |
| Life Expectancy: |
| 8 x 20µs (2000A) |
›100 occurrences |
| 10 x 700µs (400A) |
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| Response Time |
‹1 nanosecond |
| Voltage Clamp |
8, 15, 20, 30, 36, 43, 50, 60 |
| Technology |
SAD Hybrid |
Resistance
(depending on model) |
5 typical |
| Capacitance (average): |
| Standard Models |
1500pf |
| Low-Capacitance Models |
50pf |
| Operating Temperature |
–40°C to +85°C |
| Weight |
2 oz. |
| Dimensions PC642 & PCB1B: |
| H x W x L |
2.0 in. x 1.0 in. x 2.4 in. |
Caution: The hybrid design of this product includes series resistance. Do not place this product in service on any signal line capable of supplying more than 150 milliamperes continuously.
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| ORDERING INFORMATION |
| APPLICATION |
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| RS485, RS422 |
PC642C-008LC & PCB1B |
| RS423, Token Ring |
PC642C-008LC & PCB1B |
| RS232 |
PC642C-020 & PCB1B |
| E-NET, 10 BASE T |
PC642C-030LC & PCB1B |
| 4–20 ma |
PC642C-036 & PCB1B |
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