Date Code 20001006
Installation
2-11
SEL-351 Instruction Manual
High-current interrupting output contacts are polarity dependent. Note the “+” polarity markings
above even-numbered terminals A02, A04, A06, ...., A24 in Figure 2.2. Even if the Model
0351xT relay is ordered with standard output contacts (not polarity dependent), the “+” polarity
markings still appear above these terminals (same rear panel is used for both the standard output
contact and high-current interrupting output contact Model 0351xT relays).
As an example, consider the connection of terminals A01 and A02 (high-current interrupting
output contact OUT1) in a circuit:
Terminal A02 (+) has to be at a higher voltage potential than terminal A01 in the circuit.
The same holds true for output contacts OUT2 through OUT11 and ALARM (if they are also
high-current interrupting output contacts).
Note
: Do not use the high-current interrupting output contacts to switch ac control signals.
Model 0351x0
Model 0351x0 can be ordered with standard output contacts only. Refer to
General
Specifications
in
Section 1
:
Introduction and Specifications
for output contact ratings.
Standard output contacts are not polarity dependent.
Models 0351x1 and 0351xY
Models 0351x1 and 0351xY have output contacts on the:
main board
OUT101 through ALARM (ordered as standard output contacts only)
extra I/O board
OUT201 through OUT212 [ordered as standard or high-current
interrupting output contacts (all of one type or the other)]
Refer to
General Specifications
in
Section 1
:
Introduction and Specifications
for output contact
ratings. To determine the type of output contacts on the extra I/O board of your Model 0351x1
relay, refer to the part number on the serial number sticker on the relay rear panel.
Standard Output Contacts
Models 0351x1 and 0351xY part numbers with a numeral “2” in the field underlined below
(sample part numbers) indicate standard output contacts on the extra I/O board (OUT201 through
OUT212):
0351x1H42542X1
0351xYH42542X1
Standard output contacts are not polarity dependent.
Summary of Contents for SEL-351
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