3500/40 176449-01 3500 power supply/half height module

The provided text describes the usage and features of the Rack Interface Module, Rack Interface I/O Module, and Data Manager I/O Module in the context of the 3500 Monitoring System. Here is a summary:

I/O Modules and Connectors:

• Rack Interface Module:
  • Uses two I/O module types: Rack Interface I/O Module and Data Manager I/O Module.
  • Connects a 3500 host computer and Communication Processors (TDIX or DDIX) to a 3500 rack.
  • Enables daisy-chaining of racks.
• Rack Interface I/O Module:
  • Two types available: RS-232/RS-422 I/O Module and Modem I/O Module.
  • Common features for both types:
    1. OK Relay:
       • Normally energized to indicate the overall system status.
    2. RACK RS-422:
       • Used for daisy-chaining to the next 3500 rack. Up to 12 racks can be connected.
    3. EXTERNAL CONTACTS:
       • Trip Multiply (TM): Signals when the rack should be in Trip Multiply.
       • Rack Alarm Inhibit (INHB): Prevents alarms during maintenance.
       • Rack Reset (RST): Signals when modules in the rack should be reset.
• Data Manager I/O Module:
  • Can be installed between Power Input Modules and Rack Interface I/O Module.
  • Specific functionalities and connections not detailed in the provided text.

OK Relay:

• Normal Operation:
  • Normally energized.
  • Indicates the 3500 Monitoring System is OK.
• Conditions for Not OK:
  • Removing the Rack Interface Module.
  • Plugging a module into the 3500 rack (during self-test).
  • Transducer going not OK (except Keyphasor).
  • Hardware failure within a module.
  • Configuration failure.
  • Slot ID failure.
  • Any module in the 3500 rack detecting a fault.

External Contacts:

• Dry Contact Inputs:
  • Require dry contact inputs to enable specific functions.
  • Shorting the desired contact to a system common (COM) activates the function.
• Trip Multiply (TM):
  • Signals when the rack should be in Trip Multiply.
• Rack Alarm Inhibit (INHB):
  • Prevents alarms from being declared on any monitor or relay during maintenance.
• Rack Reset (RST):
  • Signals when modules in the 3500 rack should be reset.
  • Similar function as the Rack Reset switch on the front panel of the Rack Interface Module.

This information provides an overview of the connections, features, and functions of the Rack Interface Module and associated I/O modules in the 3500 Monitoring System. For detailed operational instructions and specific configurations, users should refer to the relevant manuals for this system.