Digi MIL-120A User Manual

Page 1
MIL-120A
Thin•Twist
COAX to 10BASE-T
Media Converter
12-20VAC
COL/TP
THINTWIST
Model MIL•120A
COAX to 10BaseT
CONVERTER
Ethernet / IEEE 802.3
FCC PART 15 CLASS A COMPLIANT
RCV/TP
LINK
POWER
RCV/CX
COL/CX
This guide includes the following information:
“Installation” on page 2 “Link Test” on page 2 “Disabling Link” on page 2 “Diagnostic LEDs” on page 3 “Configuration” on page 3 “RJ-45 Pinouts” on page 3 “Legal” on page 4
Doc #: 75140 Rev. D
Page 2
Install Guide

Installation

Do the following to install the MIL-120A:
1. Attach a UTP cable from the network to the MIL-120A's RJ-45 port
2. Attach a T-type BNC connector from the network cabling to the BNC connector
3. Connect the power adapter's cord from the power source to the unit
Note:
Use shielded twisted pair (CAT 5) cabling for CISPR 22 B installation.

Link Test

The MIL-120A provides a MIL-120A ships with the
Link
test function, which is a 10BASE-T standard. The
Link
function test “enabled”—only pin one jumpered
with a jumper block. This allows the LEDs to illuminate when there are links.

Disabling Link

To disable the
Link
test:
1. Use a Phillips-head screwdriver to remove the four Phillips-type screws located on the sides of the unit
2. Remove the BNC nut and its washer
3. Slide the housing off, over the BNC connector
Link
4. Locate the two-pin
jumper (Figure 1)
5. Place the jumper block onto both pins
6. Reassemble the unit (reverse steps 1 through 3)
Note:
Model: MIL-120A 2
The MIL-120A operates in a “StarLAN-10” environment when
Power and Link LEDs Illuminate.
Link Test Enabled

Figure 1.Link and DIP Switch Locations

LINK
1 2
DIP Switch
Link
is disabled. Only the
Page 3
Install Guide

Diagnostic LEDs

COL/TP: Collisions are occurring on the 10BASE-T network RCV/TP Unit is receiving packets from the 10BASE-T network Link:
Power:
There is an active connection to a10BASE-T hub (or another node) when
Link is enabled
Unit is receiving power
RCV/CX Unit is receiving packets from the 10BASE2 network COL/CX: Collisions are occurring on the 10BASE2 network
Configuration
Next to the COAX cable connector, there is a DIP switch that control the 50 ohm termination resistor (Figure 1). These switches support a variety of configurations. Both switches are shipped in the UP position (default). Other configurations include:
If the MIL-120A is connected to the end of a multi-node segment without a T­connector and terminator, enable the 50 ohm resistor by:
Placing switch 1: UP and
Placing switch 2: DOWN
If the MIL-120A is connected to a single-node “without” a T-type connector and terminator on a COAX cable of less than one meter’s length:
Place both switches (1 and 2) in the DOWN position
Note:
For this configuration, you do not need a 50 ohm terminator on the COAX segment of the MIL-120A's BNC connector.

RJ-45 Pinouts

4
5
3
2
1
6
7
8
MDI
Pin 1=TX+
Pin 2=TX-
Pin 3=RX+
Pin 6=RX-
Follow these guidelines when connecting the 10BASE-T Port:
For a Hub or a Repeater, use a straight-through cable (where the pins are connected 1 to 1, 2 to 2, 3 to 3, and 6 to 6)
For a Workstation/PC port, use a swap cable (where the pins are connected 1 to 3, 2 to 6, 3 to 1, 6 to 2)

Figure 2. RJ-45 Pinouts

Model: MIL-120A 3
Page 4

Legal

Regulatory Approvals

FCC Class A
UL 1950
CSA 22 No. 950
EN60950
CE
– EN55022 Class B – EN50082-1

Canadian EMI Notice

This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

European Notice

Products with the CE Marking comply with both the EMC Directive (89/336/EEC) and the Low Voltage Directive (73/23/EEC) issued by the commission of the European Community. Compliance with these directives implies conformity to the following European Norms:
EN55022 (CISPR 22) - Radio Frequency Interference
EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity
EN60950 (IEC950) - Product Safety
Digi International warrants to the original consumer or purchaser that each of its products, and all components thereof, will be free from defects in material and/or workmanship for a period of five years from the original factory shipment date. Any warranty hereunder is extended to the original consumer or purchaser and is not assignable.
Digi makes no express or implied warranties including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose, except as expressly set forth in this warranty. In no event shall Digi be liable for incidental or consequential damages, costs, or expenses arising out of or in connection with the performance of the product delivered hereunder. Digi will in no case cover damages arising out of the product being used in a negligent fashion or manner.

To Contact Digi

For prompt response when calling for service information, have the following information ready:
Product serial number and rev.
Date of purchase
Vendor or place of purchase
Reach Digi Technical Support at 408/744-2751 Or E-mail at “sun-tech@dgii.com”
Address: 1299 Orleans Drive
Sunnyvale, CA 94089 Voice: 408/744-2775 Fax: 408/744-2793 E-mail: info@dgii.com
Five-Year Limited Warranty
Doc #: 75140 Rev. D
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