3M Dynapro ET 3170 Terminal Series B, Installation Manual

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3M Touch Systems Proprietary Information
6
3M Dynapro ET 3170 Terminal Service Guide
Setting jumpers on the I/O filter board
This procedure is necessary only if you wish to add jumpers on the
I/O filter board. These jumpers add 100 ohm termination resistors across the TX+,
TX- or RX+, RX- signal lines.
To set the jumpers on the I/O filter board:
1. Put on a grounding strap.
2. Disconnect power to the unit.
3.
Remove security screws, if any are installed.
4.
Use the Allen key to open the enclosure of the unit (Figure 1 on
page 4), turning the key counter-clockwise one quarter turn.
5. Open the unit by grasping the front right side and pulling to the left.
WARNING
To reduce the risks associated with electrical shock or fire which, if not avoided,
could result in death or serious injury and/or property damage:
n
To ensure compliance with electrical codes and safe operation of the ET unit, have a
licensed journeyman electrician familiar with local codes perform all wiring tasks.
Important
To prevent damage from electrostatic discharge, be sure you are wearing a
grounding wrist or ankle strap before touching any components inside the
enclosure.
WARNING
To reduce the risks associated with electrical shock or fire which, if not avoided,
could result in death or serious injury and/or property damage:
n
Before removing the ET unit from its mounting or performing any other service to the unit,
disconnect power to the unit.
WARNING
To reduce the risks associated with fire and explosion which, if not avoided, could
result in death or serious injury and/or property damage:
n
Do not open the power supply in the ET unit. It contains hazardous voltages. The power
supply has no user-servicable parts or adjustments inside.