MDE-3882B Conversion of the Universal Distribution Box [D-Box (PA0261XXXXXXX)]: RS-422 to Two-wire and Two-wire to RS-422 · November 2015
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Converting D-Box from RS-422 to Two-wire
Converting D-Box from RS-422 to Two-wire
To convert a D-Box from RS-422 to two-wire, proceed as follows:
1
Loosen the two screws on the bottom front of the D-Box, and lift the lid.
2
Working on Printed Circuit Boards (PCBs) without connecting to a ground or discharging
static can damage electronic parts. Use a wrist strap and store parts in antistatic storage
bags.
CAUTION
Disconnect the cable(s) at ports P101 and P103 of T17651 Board and ports P101 and P103A/B
of M14301 Board.
3
Remove the two screws that secure the 9-pin D-Sub connectors to the D-Box case; then,
remove and discard the cable assembly.
4
Install the R18810-G1 Two-wire Cables at the D-Sub positions. Secure the cable with the
standoffs.
5
Connect the other end of the R18810-G1 Cable(s) to port P102 (for T17651) and
port P102A/B (for M14301) on the PCBs. Note the orientation of the cable.
6
Change and verify the jump jack settings.
Configuration
8 Loops/1 Input
16 Loops/1 Input
16 Loops/2 Inputs
Two-wire Current Loop Interface
(TWI): Dispensers or CRIND
devices
and
Following table lists the correct jump jack configurations:
7
Reconnect the cable at the port P101.
8
Connect the Q13850-100 Data Cables and Q13180-11B Gender Menders from the Passport
CPU or Passport Dispenser Hub.
Note: In case of D-Box with M14301 Board, Q13850-100 Cable can be directly connected to
RJ-45 input connectors P1 and P2 of the board so steps
are not required. An
additional step is to open the knockouts of box for P1 and P2, if they are not opened
already.
9
Plug in the AC power cord.
10
Replace the D-Box cover, and secure with screws.
11
Verify the operation of card readers and/or dispensing units.
Converting the D-Box from RS-422 to two-wire is now complete.
