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4.3.1 EPAC300-M51 I/O Assembly Unique Features
• NEMA "A" connector for service power and VM signal to monitor
4.3.2 EPAC300-M52 I/O Assembly Unique Features
• NEMA "A" connector for service power, VM signal to monitor and I/Os
• NEMA "B", "C" and "D" connectors for inputs and outputs
4.4 ITEM 4: Internal 1200 BPS NEMA Port 3 FSK Modem (optional)
• Plugs into I/O Assembly
• Held in place by chassis handle pocket wall
• Two mechanical programming straps, cut circuit board trace to program
• Factory set for 2-wire operation, cut JP1 strap for 4-wire operation
• Factory set for anti-stream disabled, cut JP2 strap to enable
• May be replaced with cable to modem installed in expansion slot
Figure 8: Modem Programming Straps
4.5 ITEM 5: ATC Modem Blank Cover
OR- Fiber Optic Module
• Covers the two slots reserved for standard ATC modems
• Breaks apart for 0, 1 or 2 modems installed
4.6 ITEM 6: Modem Cover Fasteners
• Four #6 stainless steel flathead screws per cover
• Attaches Item 5 to Item 1
AUGUST 2005
EPAC300-M50 SERIES USER'S MANUAL
4-WIRE: CUT JP1
ANTI-STREAM: CUT JP2
PAGE 21 OF 46
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