15
ASYNC MP LINE DRIVER CARD
edge connectors. Use the following steps as a guideline for installing each Card
into the Rack Chassis:
1. Slide the rear “connections” card into the back of the chassis along the metal
rails provided.
2. Secure the rear card using the metal screws provided.
3. Slide the “brains” card into the front of the chassis. It should meet the rear
card when it’s almost all the way into the chassis.
4. Push the front card gently into the card-edge receptacle of the rear card. It
should “click” into place.
5. Secure the front card using the thumb screws.
NOTE
Since the Chassis allows “hot swapping” of cards, you don’t need to
power down the rack when you install or remove a Card.
4.3 Wiring the Card
The rear interface card has one RS-232C port (DB25 female) and one 4-wire
twisted-pair port (RJ-11 female).
4.3.1 RS-232 C
ONNECTION
The Async MP Line Driver Card connects the RS-232 interface to your computing
hardware via a DB25 female connector. The DB25 is pinned according to the
RS-232C/V.24 interface standard. For the interface pin-out, please refer to the
diagram in
Appendix B
.
The Line Driver Card is wired to connect to a DTE. If your RS-232 output device
is a DTE, use a straight-through cable to connect to the Card. If your RS-232
output device is DCE, call Black Box Technical Support at 724-746-5500 for specific
installation instructions.
4.3.2 T
WISTED
-P
AIR
C
ONNECTION
The Async MP Line Driver Card operates over two twisted pairs. In all applications,
the twisted-pair wire must be 26 AWG or thicker, unconditioned, dry, metallic wire.
Both shielded and unshielded wire yield favorable results.
