INSTALLATION INSTRUCTIONS: OPTIONAL FOOTSWITCH FOR MODELS 175 & 176

Part No. 122919, Rev. B (8/98)

General Information

This document provides instructions for installing an optional footswitch on Midmark Models 175 and 176 tables.

Manufacturer: Midmark Corporation

Address: Versailles, Ohio 45380

Phone: 937-526-3662

Fax: 937-526-5542

Installation Steps

Turn the power on/off switch to the off position and disconnect the power cord from the power source.
Remove the "cover-base trim" from the foot end of the table. Retain both the cover and hardware for reinstallation.
Remove the hole plug from the foot end of the base and discard it.
String the footswitch cable through the hole in the base (refer to Figure #1). Orientation of the cable: the 9-circuit cap should be to the inside of the base.
Position the cable so that the outer jacket projects about 1"-2" inside the base and install the strain relief bushing, provided with the kit.
Connect the nine (9) circuit cap of the footswitch cable to the plug of the base harness.
Remove the #10-32 hex nut from the grounding stud. Connect the "green" ground lead of the footswitch cable to the grounding stud. Reinstall the #10-32 hex nut.
Install the "cover-base trim" back onto the base, using the hardware removed in step #2.
String the cable through the bracket-strain relief at the footswitch end (refer to Figure #3). Pay attention to the orientation of the bracket.
Position the cable so that the outer jacket projects about 1/2" inside the bracket and install the strain relief bushing, provided with the kit.
Using two (2) #10-24x3/8 taptite screws and two (2) #10 L-washers, provided with the kit, mount the strain relief bracket in the footswitch assembly (refer to Figure #3).
Connect the wire leads of the footswitch to the footswitch cable leads at the connector joints. Refer to Figure #2 for specific wire connections at the footswitch.
Mount the "wire cover", provided with the kit, to the footswitch using seven (7) #10-24x3/8 self-tapping screws, also provided with the kit (refer to Figure #3).
Plug the power cord into the power source.
Turn the on/off switch to the on position.
Test the footswitch functions to verify proper operation of the table.

Diagram Descriptions

Figure #1: Base Connections

This figure illustrates the grounding stud located on the base of the table. It also shows the strain relief bushing being inserted into a hole in the base. A note indicates that the green wire from the footswitch cord should be inserted between the screw head and washer to ground the footswitch.

Figure #2: Wire Connections

This diagram details the wiring connections between the main harness connector (J9) and the remote footswitch. The J9 connector has terminals P9-1 through P9-9, along with a GREEN/YELLOW ground wire. The remote footswitch has multiple connectors for functions like LEG UP/DOWN, TILT UP/DOWN, BACK UP/DOWN, and TABLE UP/DOWN, each with terminals 1, 2, 3, and 4. The specific wire color to terminal mappings are as follows:

P9-1 (RED) connects to TILT UP (terminal 1) and TILT DOWN (terminal 2).
P9-2 (BLACK) connects to BACK UP (terminal 1) and BACK DOWN (terminal 2).
P9-3 (WHITE) connects to LEG UP (terminal 1) and LEG DOWN (terminal 2).
P9-4 (BLUE) connects to TABLE UP (terminal 1) and TABLE DOWN (terminal 2).
P9-5 (GREEN) connects to TILT UP (terminal 3) and TILT DOWN (terminal 4). This wire is also connected to the grounding stud.
P9-6 (BRN BLK) connects to BACK UP (terminal 2) and BACK DOWN (terminal 3).
P9-7 (WHT/BLK) connects to LEG UP (terminal 2) and LEG DOWN (terminal 3).
P9-8 (GRAY) connects to TABLE UP (terminal 2) and TABLE DOWN (terminal 3).
P9-9 (VIOLET) connects to TILT UP (terminal 4) and TILT DOWN (terminal 3).
The GREEN/YELLOW wire is connected to the grounding stud.

Figure #3: Footswitch Assembly

This figure shows the footswitch end of the installation. It depicts routing the cable through a bracket-strain relief and installing a strain relief bushing within the bracket. The strain relief bracket is then mounted to the footswitch using two #10-24x3/8 self-tapping screws and two #10 L-washers. Finally, a wire cover is attached to the footswitch using seven #10-24x3/8 self-tapping screws.

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