Application Processor

• Processor: Motorola MPC860, 32-bit, 50 MHz
• Flash PROM:
  • 6 MB for SX, IOX, and control application storage
  • CRC-protected
• DRAM:
  • 16 MB for SX control application execution and program/SOE data
  • Byte parity
• NVRAM:
  • 8 KB for retentive variables
  • CRC-protected
• Clock Calendar:
  • Accuracy during power on:
    • 1 sec/day typical
    • 2.2 sec/day maximum
  • Accuracy during power off (battery-backed):
    • 2.2 sec/day typical
    • 9.2 sec/day maximum
• Battery:
  • ½ AA lithium, 15-year predicted life
• TriBus:
  • 25 Mbps, CRC-protected
  • 32-bit + parity DMA
• TriStation Port 1:
  • 10BaseT Ethernet connector (RJ-45 shielded)
• Modbus Port 1:
  • RS-232/485 DTE (DB-9-pin shielded)
• Debug Port:
  • Access to diagnostic information (RJ-12 connector, shared with IOX debug port)
• Communication Bus:
  • RS-485, 2 Mbps HDLC
• Alarm Contacts:
  • Redundant, normally closed

Logic Power

• Nominal Input Voltage: 24 V DC
• Operational Voltage Range:
  • 24 V DC –15%/+20% (+5% AC ripple)
  • (+19.2 / +30 V DC)
• Logic Power: 8 W maximum
• Absolute Maximum Input Voltage: 33 V DC
• Absolute Maximum Reverse Input Voltage: –0.6 V DC
• Input Power Interruption Time from Nominal: 1 ms minimum
• Repetition Rate: 1 sec maximum
• Reverse Current Isolation: 500 µA maximum (input to input)
• In-rush Current per Input:
  • 2.4 A maximum
  • 1.2 A for 50 ms, typical
• Short Circuit Current Limit per Input: 2.4 A maximum
• Functional-Earth-to-Logic-Ground Isolation: 0 V, no isolation
• Protective-to-Functional-Earth Isolation: 500 V DC

Input/Output Processor

• IOX Processor: Motorola MPC860, 32-bit, 50 MHz
• DRAM:
  • 16 MB for IOX execution
  • Byte parity
• Shared Memory:
  • 128 KB for communication with SX
  • Byte parity
• Diagnostic Bus:
  • 2 Mbps HDLC for I/O module diagnostic communication between MP channels
• Debug Port:
  • Access to diagnostic information (RJ-12 connector, shared with SX debug port)
• I/O Bus:
  • RS-485, 2 Mbps HDLC

Logic Power (IOX)

• Nominal Input Voltage: 24 V DC
• Operational Voltage Range:
  • 24 V DC –15%/+20% (+5% AC ripple)
  • (+19.2 / +30 V DC)
• Logic Power: 8 W maximum
• Absolute Maximum Input Voltage: 33 V DC
• Absolute Maximum Reverse Input Voltage: –0.6 V DC
• Input Power Interruption Time from Nominal: 1 ms minimum
• Repetition Rate: 1 sec maximum
• Reverse Current Isolation: 500 µA maximum (input to input)
• In-rush Current per Input:
  • 2.4 A maximum
  • 1.2 A for 50 ms, typical
• Short Circuit Current Limit per Input: 2.4 A maximum
• Functional-Earth-to-Logic-Ground Isolation: 0 V, no isolation
• Protective-to-Functional-Earth Isolation: 500 V DC