Specifications

Installing the Mini Driver Card in the MicroRack:
The Mini Driver Card is made up of a main (front) module and an interface (rear) module. The two cards meet inside the rack chassis; their mating 50-pin card-edge connectors plug into each other. Use these steps to install each Mini Driver Card into a
MicroRack:
1. Slide the rear module into the back of the MicroRack on the metal rails.
2. Secure the rear module using the included metal screws.
3. Slide the front module into the front of the chassis. It should meet the rear module when it is almost completely in the chassis.
4. Push the front module gently into the card-edge receptacle of the rear module. It should "click" into place.
5. Secure the front module using the thumbscrews.
NOTE:
Since the MicroRacks allow "hot swapping" of cards, it is not necessary
to power down the rack when you install or remove a Mini Driver Card.
The RS-232 Serial Cables and Connectors:
The Mini Driver Card's RS-232 ports are always the lower two ports on its interface module. They are 10-pin female RJ-style connectors (compatible with regular male RJ-45 cable connectors), pinned according to a modified version of the EIA/TIA-561 standard,
as shown below.
The 10-Pin RJ Interface:
Pin #: Signal Name/Description:
1 Not Used
2 DCE Ready (DCR [DSR])
3 Received Line Signal Detector (RLSD [CD])
4 DTE Ready (DTR)
5 Signal Common (SCOM [SGND])
6 Receive Data (RD)
7 Transmitted Data (TD)
8 Clear to Send (CTS)
9 Request to Send (RTS)/Ready for Receiving (RR)
10 Not Used
The Mini Driver Card is wired as a DCE (Data Communications Equipment) device. Therefore, it would normally be connected to DTE (Data Terminal Equipment) RS-232 devices. You might need to run a special cable or use a special modular adapter if either of the
RS-232 devices you want to attach have DB25 or DB9 serial-port connectors. Even if the DTE's serial ports are RJ-45 connectors, you might still need to use a specially pinned cable. Call Black Box Technical Support with these issues, or if you want to attach a DCE
device to the Card.
The Modem-to-Modem Line Cables and Connectors:
The Mini Driver Card's line ports are always the upper two ports on its interface module. They are 8-pin RJ-45 connectors, pinned for a standard telco-wiring environment, as shown below. The Mini Driver Card operates full duplex over four wires (two twisted
pairs). In all applications, the twisted-pair wire must be 26 AWG or thicker, unconditioned, dry, and metallic. Both shielded and unshielded cable yield favorable results.
NOTE:
The Mini Driver Card can only communicate in a closed data circuit with another
Mini Driver Card. It will not work with dialup analog circuits, such as those used
with standard modems.
The modem-to-modem cable connection must be specially cross-pinned, as shown below. If your cabling includes punchdown blocks, you can easily do the cross-pinning at a punchdown. If you will be running cable directly between two Mini Driver Cards, you
can get a custom cable from Black Box as a special quote, or you can use regular straight-through-pinned cable and repin one of the RJ connectors (that is, rearrange the wiring connections between the terminal block and the actual contacts). You might need
special crimping tools or new connectors; call Black Box for these items, or for technical support if you have difficulty.
Signal Pin# Pin# Signal
N/C 1 8 N/C
GND 2 7 GND
RCV- 3 5 XMT-
XMT+ 4 6 RCV+
XMT- 5 3 RCV-
RCV+ 6 4 XMT+
GND 7 2 GND
N/C 8 1 N/C
1 2 3 4 5 6 7 8
RJ-45