User's Manual

EP308 SpecificationsManual
06E00079-001A
9
EP308 SpecificationsManual | Trapeze July 22, 20144
6.5 Ethernet
6.5.1 Connector
Connector: D-SUB 50 Male
Mating Connector: D-SUB 50 Female, AMP 1658641-3 or equivalent
6.5.1 Pinout
Pin
Number
Signal
Signal Type
1
TPI+
Data In+
2
TPI-
Data In-
3
TPO-
Data Out-
4
TPO+
Data Out+
5
SHIELD
Ground
7 Card Interfaces
7.1 Micro-SD Card Slot
One MicroSD card slot for removable memory storage.
7.2 SIM Card Slot
One Mini-SIM (2FF) card slot.
7.3 SAM Card Slots
Two Secure Access Module card (2FF) slots.
8 Interface Specifications/Recommendations
8.1 J1708
J1708 is a modified version of RS-485. J1708 specifies 18 gauge wire with 1 twist per inch with
a total network length of 131 feet (40m) maximum. The minimum/maximum voltages on the bus
are specified to be -7V – +12V. The data rate is 9600 baud. The standard node in the J1708
standard is shown in Figure 8-1.
Vdiff is defined as A – B. If A – B ≥ 200 mV then the data bit is a 1, -200 mv ≤ A – B ≤ 200 mV
is undefined, A – B ≤ -200mV the data bit is a 0.