Section DTW‐A52‐802‐202
030‐101665 Rev. C
R
5
1205I2RC
Figure 6. 528‐02I2 Functional Wiring Diagram
−
For 2
−
Wire HDSL/DS1,
Use Facility T and R
−
For 2
−
Wire HDSL/DS0,
Use Facility T1 and R1
TYPICAL FOR BOTH
CIRCUITS
CPE=Customer Premise Equipment. NET=Network equipment.
Circuit #1 = the top slot when the table‐top mounted unit
is in the closed position (or left‐most slot when wall mounted
unit is open).
FRAME GND
LUG
ESD JACK
(GRN) FRAME GND
(BLK) + PWR
CKT GND
(RED)
−
PWR
RCV FROM
FAC
XMT TO
FAC
T
R
T1
R1
LED 1
CKT#1
OR
CKT#2
25 17 35
2 11 27
7
13
41
47
5
15
55
49
7
8
2
1
2
1
5
4
5
15
55
49
R
T1
R1
T
RJ48S
RJ48c
J1
−
J2
OR
XMT TO
CPE
RCV FROM
CPE
CUSTOMER
CONNECTIONS
FACILITY
CONNECTIONS
SWITCH TO CONFIGURE RJ48 JACK FROM
”C” TO ”S”
CKT#1
CKT#2
SLOT POSITIONS
‐ LIST 4‐9 WIREWRAP PIN NOTE ‐
The List 4‐9 option provides wirewrap pin connectors inside the unit for
Network connections, instead of screw terminals. Substitute the term
“wirewrap pin header” for “screw terminal block” when referencing the
528‐02I2, List 4‐9.
Card Edge Connector
CI Connector Position/Pin
Function
Pin #
TB2
TB4
RJ48C
J1/J2
RJ48S
J1/J2
Receive from CPE
55
T
5
2
Receive from CPE
49
R
4
1
Transmit to CPE
5
T1
2
7
Transmit to CPE
15
R1
1
8
Table 3. Customer Interface Connections
3.5
Connecting Customer Interface Cables
Make customer connections to J1 and J2 (the RJ48C/S jacks) or
to one or both screw terminal blocks, TB2 and TB4, using
shielded twisted pair cable (22‐24 AWG minimum) of a length
consistent with local installation practices. If only one module is
used in the assembly, insert it into the top (upper) slot or position
and use connector J1 or TB2 for customer connections. See
Table 3 for pin numbers and lead designations.
Function
TB5 Terminal Block Label
Negative Power In
-PWR
Earth Ground
FRAME GROUND*
Ground Return
CIRCUIT GND*
Positive Battery In
+PWR
*Note: For applications requiring chassis ground to be connected to circuit ground, an optional ground strap
is provided for installation between the FRAME GND and CIRCUIT GND terminals on TB5.
Table 4. Power and Ground Connections
3.6
Connecting Power and Ground
The module(s) in the 528‐02I2 can be span/line powered or local
ly powered with an external NRTL‐Listed Limited Power
FRAME GND
+PWR
‐PWR
FRAME GND
Mounting
CKT GND
+PWR
TB5
Chassis
Ground
Lug
To
Lightning
Return
To Ground Window (e.g., cold water pipe)
Mounting
‐PWR
CKT GND
TB5
Chassis
Ground
Lug
To Lightning
Return Ground
To Ground Window (e.g., cold water pipe)
-
+
GND
Local
Power Supply
Figure 7. Grounding with Span Power
Figure 8. Grounding with Local Power
Optional*
Ground
Strap
Optional*
Ground
Strap
* See note at the
end of Table 4.
* See note at the
end of Table 4.
Source. Local power and ground connections to the assembly are
made to TB5. See Table 4 for power and ground connections.
For convenience, Westell offers a wall‐mounted (plug‐in) power
supply, part A90‐204100.
3.7
Securing Cables
After the assembly has been mounted and all wire connections
have been made, use the four cable ties provided to secure all
wires/cables.
3.8
Installing Modules
When all wiring is completed and secured, the module(s) may be
installed inside the assembly cover. The unit makes electrical
connection when installed and properly seated in the 56‐pin
card‐edge connector of the assembly. Refer to the appropriate
