GE MDS DS-EL806-24 Users Manual
4.0 EVALUATION BOARD DOCUMENTATION
This section contains an assembly drawing and parts list for the OEM
Evaluation Board. In addition, a separate foldout schematic of the Board is
included at the back of this manual. Board documentation is provided to assist
integrators who need to create compatible interface circuitry between the
OEM transceiver and host equipment.
NOTE: The foldout schematic may also be accessed from the TransNET Support
Package CD, or from our website at: www.microwavedata.com.
4.1 Assembly Drawing
Invisible place holder
GND
2
16
J2
U2
o
1
C13
C12
C15
+
C14
R10
L1
CR2
R13
R14
R11
C
NA
C8
A
CR1
+
CR3
C30
C16
FH1
1
J3
C19
o
C17
C18
C20
C31
C21
U3
J1
C7
C6
2
6
1
J4
Figure 14. Evaluation Board Assembly Diagram
DIAG_TXD
1
ALARM
DIAG_RXD
SLEEP
SHUTDN
DCD
UNREG_PWR
RXD
LED
CTS
GND
15
REG_PWR
RTS
TXD
C4
1
C29
51
9
CR6
K3
R15
CR5
K2
CR4
K1
C1
C2
C3
o
28
C5
U1
C11
C10
C9
6
J5
C24
<
C
E
Q2
B
R9
R8
5
<
C26
C23
R5
C
E
Q1
B
R7
5
<
U4
C22
C25
R12
R6
1
U5
R3
1
R4
4.2 Parts List
Table 6 lists the electronic components used on the Evaluation Board.
Table 6. OEM Evaluation Board Parts List
Ref. Desig. Part Description
CR1 DIODE, SOT23 SMALL SIG 914 5D
CR4 CR5 CR6 RECTIFIER, 30V B13
CR2 CR3 DIODE, SCHOTTKY POWER, SMT, SNGL, UPS840
Q1 Q2 TRANSISTOR, SOT23 NPN 6429 M1LR
18 T r ansNET OEM 2.4 Integration Guide MDS 05-xxxxA01, Rev . 01
Table 6. OEM Evaluation Board Parts List (Continued)
U4 U5 IC, LINEAR SC70-5 COMPARATOR SNGLE LMV33
U1 IC, IN'FACE SSOP28 RS-232 TXVR SP3238E
U3 IC, IN'FCE 20PIN TSSOP DRIVER SP3222
U2 IC, SWITCHING REG'R ADJ.4.5A LT1374HVIR
K1 K2 K3 RELAY, DPDT
R10 RESISTOR, CHIP 0603 1/16W 5% 2.2K
R4 R5 R13 R14 RESISTOR, CHIP 0603 1/10W 1% 10K
R12 RESISTOR, CHIP O603 1/10W 1% 100K
R7 R9 RESISTOR, CHIP 0603 1/10W 1% 1.5K
R11 RESISTOR, CHIP O603 1/10W 1% 1.82K
R3 RESISTOR, CHIP 0603 1/10W 1% 22.6K
R15 RESISTOR, CHIP O603 1/10W 1% 31.6K
R8 RESISTOR, CHIP 0603 1/10W 1% 470 OHM
R6 RESISTOR, CHIP O603 1/10W 1% 6.81K
C12 CAP, TANT 7343 20% 10V 100uf
C6 C7 C9 C10
C11 C29 C31
C1 C2 C3 C4 C5
C17 C18 C19
C20 C21 C22
C23 C24 C25
C26 C8
C13 CAP, CHIP 0603 X7R 10% 470 pf
C14 CAP, CHIP 0603 X7R 10% 4700pF
C15 Capacitor, Low ESR Chip Ceramic, 1210 22uF
C16 Capacitor, Low ESR Chip Ceramic, 1210 4.7
L1 INDUCTOR, SWITCHING, 20%, 10uH
J1 CONN, HEADER, .100 DUAL STR 4-PIN
P/O J1 1-2, P/O
J1 3-4
FH1 FUSE HOLDER, PCB SMT W/2A SLO-BLO FUSE
CAP, CHIP 0603 50V NPO 5% 100pf
CAP, CHIP 0603 X7R 10% 0.1uF
CONN, JUMPER
MDS 05-xxxxA01, Rev. 01 TransNET OEM 2.4 Integration Guide 19
Table 6. OEM Evaluation Board Parts List (Continued)
J2 CONN, HEADER, PC MOUNT .078, DUAL, 16 PIN
J3 CONN, TERM STRIP, 5MM PCB
J4 CONN, TELE JACK 6POS 6CON RT A SMT W/F
J5 CONN, D-SUB, PCB RCPT 90 DEGREE, 9 PIN
Samtec TW Series, Part No: ASP 103812-01
(Mates with J3 on the OEM radio transceiver)
4.3 Evaluation Board Fuse Replacement
The Evaluation Board is protected by a 2 ampere fuse. The fuse can be blown
by an over-current condition caused by an internal failure or over-voltage.
Follow the procedure below to remove and replace the fuse:
1. Disconnect the primary power cable and all other connections to the
Evaluation Board.
2. Locate the fuse holder assembly , FH1, behind the green power connector,
J3.
3. Loosen the fuse from the holder using a very small screwdriver, then use
a small pair of needle-nose pliers to pull the fuse straight up and out of
the holder.
4. Use an ohmmeter or other continuity tester to verify that the fuse is open.
5. Install a new fuse in the holder. Replacement fuse information: Littelfuse
#0454002; 452 Series, 2 Amp SMF Slo-Blo fuse (MDS Part No.
29-1784A03).
20 T r ansNET OEM 2.4 Integration Guide MDS 05-xxxxA01, Rev . 01
5.0 TRANSCEIVER MOUNTING
This section provides information for mounting the OEM transceiver in a host
device. The module need only be protected from direct exposure to the
weather. No additional RF shielding is required.
5.1 Mounting Dimensions
Figure 15 shows the dimensions of the transceiver board and its mounting
holes. If possible, choose a mounting location that provides an unobstructed
view of the radio’s LED status indicators when viewing the board from
outside the host device.
Mount the transceiver module to a stable surface using the four mounting
holes at the corners of the PC board. Standoff spacers should be used to
maintain adequate clearance between the bottom of the circuit board and the
mounting surface. (Fasteners/anchors are not normally supplied.)
3.45”
(87.5 mm)
1.81˝
(46 mm)
T
3.11”
(7.9 cm)
Side View
w
ie
V
p
o
1.49˝
(3.8 cm)
(16 mm)
0.63”
Figure 15. Transceiver Mounting Dimensions
5.2 Antennas & Feedlines
A number of omnidirectional and directional antennas are available for use
with the radio. Contact your factory representative for specific
recommendations on antenna types and hardware sources. In general, an
omnidirectional antenna (Figure 16) is used at master station sites in order to
provide equal coverage to all of the remote units.
MDS 05-xxxxA01, Rev. 01 TransNET OEM 2.4 Integration Guide 21
At remote sites and in many point-to-point systems, a directional Yagi
antenna (Figure 17) is generally recommended to minimize interference to
and from other users and to maximize range.
For systems operating in a very short range environment, small, flexible whip
antennas may also be supplied. Such antennas are available for direct
connection to the transceiver module, or for exterior mounting with various
lengths of feedline.
Figure 16.
Omnidirectional Antenna
(shown mounted to mast)
Invisible place holder
Figure 17. Typical Yagi Antenna (shown mounted to mast)
Feedlines
The feedline supplied with the antenna was carefully selected to minimize RF
loss and ensure regulatory compliance with the antenna being used. Do not
make substitutions or change the lengths of the antenna system feedline. If
you require a different length of feedline for your installation, contact your
factory representative for assistance.
NOTE: Strong fields near the antenna can interfere with the operation of the low level
22 T r ansNET OEM 2.4 Integration Guide MDS 05-xxxxA01, Rev . 01
RTU circuits and change the reported values of the data being monitored. If interference is experienced, it may be necessary to re-orient the antenna with respect to the radio, RTU, sensors or other components of the system.
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