Specifications
REPLACING THE POWER SUPPLY'S FUSE:
The MicroRack's power supply uses a 400-mA fuse for 120-VAC circuits, and a 200-mA fuse for 240-VAC circuits. The fuse compartment is located just below the AC socket on the power supply's rear
module. To replace the fuse, follow these steps:
1. Making sure the rack is turned off and unplugged, use a small screw-driver to pop the compartment open: It will slide open like a drawer.
2. Notice that there are two fuses in the compartment: The rear fuse is "active," and the front fuse in the "spare".
3. If the active fuse appears to be blown, remove it from the clips and replace it with the spare from the front of the compartment. Note the size and rating of the blown fuse before discarding it.
4. Order a new replacement fuse. Both the 400-mA fuses (Littelfuse 239.400 or equivalent) and the 200-mA fuses (Littelfuse 239.200 or equivalent) measure 5 X 20 mm.
CAUTION!
For continued protection against the risk of fire, replace
blown fuses only with fuses of the same type and rating.
SWITCHING THE POWER SUPPLY BETWEEN 120 AND 240 VOLTS:
Although the MicroRack is shipped from the factory with a customer-specified power-supply configuration, you may change the configuration yourself. Follow these steps to switch the configuration of the
power supply between 120 VAC and 240 VAC:
1. Making sure the rack is turned off and unplugged, remove the power supply's front module and locate the two-position switch (labeled either "110/220" or "115/230") near the back of the card.
Slide the switch to the setting corresponding to your desired voltage.
2. Replace the existing fuses with fuses of the correct type.
3. If necessary, replace the power-supply cord with a country-specific cord. (For certain countries, your supplier might be able to give you a special quote on country-specific cords.) Plug the
cord back in.
Installing the Mini Driver MP Card in the MicroRack:
The Mini Driver MP 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 MP 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 MicroRack allow "hot swappable" of cards, it is not
necessary to power down the rack when you install or remove
a Mini Driver MP Card.
The RS-232 Serial Cables and Connectors:
The Mini Drier MP 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.
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 MP 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 the serial ports of either of the RS-232 devices you want to attach are DB25 or DB9 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.