Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
Page 3 of 7
Hazardous voltage.
Will cause death or serious
injury.
Turn off and lock out all power supplying
the circuit breaker prior to cover(s) removal
or while cover(s) are removed and when
installing any internal or external accessory.
Replace the cover(s) and shield(s) before
power supplying this device is turned on.
Installation:
1. Connect an EPC ribbon cable from the front of the Sensitrip Trip Units Test Connector to an EP; note that the
connector is keyed, so that it can only be inserted one way.
2. Based on the sites coordination study, configure the EPs DIP switches for Short Time and/or Ground Fault
ZSI per the EP Information and Instruction Sheet.
3. Connect an MTC cable from the EP to one of eight MTZ communication ports.
4. Configure the MTZs DIP switches to identify the zones for each breaker, per the sites coordination study and
the MTZ instruction sheet.
5. If multiple MTs are used, the Com terminal from the first MTs SEABus Out port must be connected to the
Com terminal of the next MTs SEABus In port on each MT being used.
6. See figure 1 for system connection diagram.
B. Sensitrip MCCB ACCESS Communications (with or without Zone Interlocking)
Components Required:
• Siemens MTA - one per 8 trip units
• Siemens EP expansion plug - one per trip unit
• Siemens type EPC cable - one per trip unit
• Siemens type MTC cable one per trip unit
Installation:
1. Connect an EPC ribbon cable from the front of the Sensitrip Trip Units Test Connector to an EP; note that
the connector is keyed, so that it can only be inserted one way.
2. If ZSI is required, configure per the sites coordination study, and configure the EPs DIP switches for Short
Time and/or Ground Fault ZSI per the EP Information and Instruction Sheet. If ZSI is not required, adjust the
EPs DIP switches to NO ZONE (0000).
3. Connect an MTC cable from the EP to one of eight MTA communication ports.
4. If ZSI functionality is additionally required, per the sites coordination study, configure the MTA to identify the
zones for each breaker according to the MTAs instruction sheet. If multiple MTs are used, the Com termi-
nal from the first MTs SEABus Out port must be connected to the Com terminal of the next MTs SEABus
In port on each MT being used.
5. If ZSI is not required, set the MTAs Device Configuration DIP switches to NO ZONE (00) and the MTAs
Device Type DIP switch to MCCB/ICCB (0001).
6. Connect RS-485 twisted pair communication cable to the MTAs A(+), B(-) terminals and only one end of the
cables shield to the MTs GND terminal. Configure the ACCESS system network, per Installing the ACCESS
System manual. An Isolated Multidrop Converter may be installed as an option. See figure 1 for system
connection diagram.
Installing Sensitrip
TM
and SB Electronic Trip Units In Zone
Selective Interlocking or ACCESS
TM
Communications Systems
(20 strony)
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