User's Manual

Model EM110100 Integration Specification Electrical Interface
On-Ramp Wireless Confidential and Proprietary 11 014-0026-00 Rev. A
4.2 Pin and Signal Descriptions
The following table lists the pins and signals for the J500 connector.
MCM Pin # Pin Name Signal Description
1 SPARE 1 GPIO to/from AMI, Not Used.
2 SPARE 2 GPIO to/from AMI, Not Used.
3 M_COMM_BD_FORCE
AMI input; 2 functions, Board Detect and Meter in optical
communication session.
4 METER_VDD AMI power input; 4.0VDC nominal.
5 M_PWR_FAIL AMI input; Power Good = HIGH, Power Off = LOW.
6 GROUND Electrical Ground.
7 M_RXD_FROM_AMR AMI output to UART. 9600 bps, 8-bit, no parity, 1 stop bit.
8 M_COMM_BD_SENSE AMI output for AMR detection initial handshaking.
9 M_TXD_TO_AMR AMI input to UART. 9600 bps, 8-bit, no parity, 1 stop bit.
10 M_TROUBLE AMI input for meter trouble notification.
11 M_LINE_ZC AMI Input, AC line zero crossing signal.
12 M_MUX_CTRL AMI output, set low to communicate with meter.
4.3 Environmental
4.3.1 ESD
The Raptor has bidirectional ESD protection diodes on its 8 digital I/O pins providing protection
to
IEC 61000-4-2; level 4.
Table 6. ESD Rating
ESD Model Class and Minimum Voltage
HBM Class 1C ( >1000V)
MM Class A (>100V)
The antennas have protection in the form of an inductor to ground, thus allowing some
robustness to direct ESD strikes. Additionally, the antennas are encapsulated in the
polycarbonate housing of the meter – so there is little chance of high voltages on the antennas,
or others of the board.
4.3.2 Harsh Environments
The Raptor is designed to be an embedded circuit card in an enclosed protective shell. It is not
designed to be exposed to outdoor environments without a case or similar protections. An IP 67
or better protective casing is strongly recommended. The polycarbonate dome of the meter
nominally provides robustness to harsh environments.