OPTO 22 SNAP PAC S Series, Руководство пользователя

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PAC S2 SERIAL WIRING DIAGRAMS
SNAP PAC S-Series User’s Guide 26
PAC S2 SERIAL WIRING DIAGRAMS
Make sure to verify the location of pin 1, which is indicated on
the controller with a label or a small triangle. To be certain of
pin 1’s locations, insert the connector into the controller and
then mark the location of pin 1 on the connector itself.
Brains in the middle of the link should not be biased or
terminated. The devices at both ends of the network
should be terminated. In addition, the RS-485 link
should be biased at one location only, which is typically
at the controller.
PAC S2 Controller to B3000 mistic Brains with an Interrupt Line
Pin 1
B3000 B3000
Chassis GND
TX/RX +
TX/RX –
COM
IRQ +
IRQ –
Two-wire
1
2
3
4
5
6
PAC S2
NOTE: To set bias and termination on
a B3000-B, see form 1927
,
Configuring the B3000-B .
B3000 B3000
Chassis GND
Four-wire
PAC S2
4
5
3
1
2
6
RX+
RX-
COM
TX/RX +
TX/RX –
IRQ+
NOTE: The connector pins on an
actual SNAP-PAC-S2 are in a
different order than shown
here.
NOTE: To set bias and termination on a
B3000-B, see
Configuring the
B3000-B (form 1927).