Pub.
42004-256C
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
RigCom Stations
Confidentiality Notice
This manual is provided solely as an installation, operation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics retains
all intellectual property and other rights in or to the information contained herein, and such information may
only be used in connection with the operation of your GAI-Tronics product or system. This manual may not
be disclosed in any form, in whole or in part, directly or indirectly, to any third party.
General Information
This maintenance manual contains information relating to the following RigCom Stations:
Model Number Description
MS3985 120 V ac Common Talk Station
MS3986 120 V ac Master Station
MS3987 120 V ac Hands-free (Slave) Station
MS3988 12 V dc Common Talk Station
MS3990 12 V dc Hands-free (Slave) Station
Operation
RigCom Stations are designed to provide basic communications in Division 1 (hazardous) areas. RigCom
systems can consist of common talk stations or master and slave stations. Common talk standard station
Model MS3985 (120 V ac) and MS3988 (12 V dc) operate in a push-to-talk and release-to-listen manner.
In the master/slave system, the master station operation is push-to-talk, release-to-listen. The hands-free
slave station is normally in the “talk” mode. When the master station pushes the button to talk, the
hands-free slave station switches to the “listen” mode. Communications are controlled by the master
station. Only one slave station can be connected to a master. Model MS3986 (120 V ac) Master Station
can be used in conjunction with either the Model MS3987 (120 V ac) or MS3990 (12 V dc) Hands-free
Slave Station.
Note: If the Model MS3990 Slave Station (12 V dc) is used, the power feeds to each station must be
separate.
GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA
610-777-1374 n 800-492-1212 n Fax: 610-775-6540
VISIT WWW .GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Pub. 42004-256C
RigCom Stations Page: 2 of 3
Mounting and Installation
See the connection drawings provided with the unit for specific details. To maintain the explosion-proof
integrity of these stations, all hardware is located outside the enclosure. The suggested mounting height for
all stations is 54 inches (137 cm) from the ground to the center of the unit.
Note: Mounting hardware is not included and must be provided by the customer.
Common talk stations can be daisy-chained together and require five conductors—three for power
(14 gauge) and two for audio. The master station and the slave station require six conductors—three for
power (14 gauge), two for audio, and one to key the master/slave operation.
To install the RigCom system in hazardous areas, see the national and/or local electrical codes.
Figure 1. Wiring Details
f:\standard ioms - current release\42004 instr. manuals\42004-256c.doc
04/03
Pub. 42004-256C
RigCom Stations Page: 3 of 3
Specifications
Supply voltage.............. MS3985/MS3986/MS3987 ......................................... 120 V ac +/-10% @ 60 Hz
MS3988/MS3990 ................................................ 12 V dc nom. 10.8 to 14.8 V dc
Power consumption....... MS3985/MS3986/MS3987 ............................................. 30 V.A. max. (17 watts)
MS3988/MS3990 ......................................................... 17 watts max. (1.2 amps)
Audio output................................................................................................................................ 8.0 watts
Ambient temperature range .............................................................................................-40° F to +150° F
Frequency response............................................................................................................ 130 to 5000 Hz
Weight..............................................................................................................................................40 lbs
Dimensions........................................................................................................9 W × 20 H × 10 D inches
FM Approvals ..................................................................................................... Div. 1, Class I, Group D
REPLACEMENT PARTS
120 V ac 12 V dc
Part Number Description MS3985 MS3986 MS3987 MS3988 MS3990
13355-101 Speaker Driver, 16-ohm n n n n n
13357-002 Speaker Horn n n n n n
13357-003 Speaker Cone n n n n n
13357-004 Washer for 13357-002 n n n n n
13357-005 Washer for 13357-002 n n n n n
13357-006 Washer for 13357-002 n n n n n
KN2538 Knob n n n n n
MC3791 Button Guard n n n
MC3792 Button CH n n n
51901-004 Fuseholder, Carrier n n n n n
12504-008 On/Off Button w/Push, Kit n n n
12504-007 On/Off Button Kit n n
12705-001 PCBA, Speaker Station n n
12705-002 PCBA, Speaker Station n
12705-003 PCBA, Speaker Station n
12705-004 PCBA, Speaker Station n
f:\standard ioms - current release\42004 instr. manuals\42004-256c.doc
04/03
Warranty
Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any
GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall
comply with the then-current product specifications and product literature, and if applicable, shall be fit
for the purpose specified in the agreed upon quotation or proposal document. If (a) Seller’s goods prove
to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose
specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above,
Buyer may return such goods to GAI-Tronics nearest depot repair facility, freight prepaid, at which time
they will be repaired or replaced, at Seller’s option, without charge to Buyer. Repair or replacement shall
be Buyer’s sole and exclusive remedy, and the warranty period on any repaired or replacement equipment
shall be one (1) year from the date the original equipment was shipped. In no event shall GAI-Tronics
warranty obligations with respect to equipment exceed 100% of the total cost of the equipment supplied
hereunder. Buyer may also be entitled to the manufacturer’s warranty on any third-party goods supplied
by GAI-Tronics hereunder. The applicability of any such third-party warranty will be determined by
GAI-Tronics.
Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors,
shall be performed in accordance with the standard of care with which such services are normally
provided in the industry. If the services fail to meet the applicable industry standard, GAI-Tronics will,
for a period of one (1) year from the date of completion, re-perform such services at no cost to Buyer. Re-
performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall GAI-Tronics
warranty obligations with respect to services exceed 100% of the total cost of services provided
hereunder.
Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided
hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty
periods as set forth above. Provided, however, that if the defect complained of is latent and not
discoverable within the above warranty periods, every claim arising on account of such latent defect shall
be deemed waived unless it is made in writing within a reasonable time after such latent defect is or
should have been discovered by Buyer.
Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be
responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent
caused by Buyer’s neglect, failure to follow operational and maintenance procedures provided with the
equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the
equipment. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE IN LIEU OF AND
EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED
BY OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Return Policy
If the equipment requires service, contact your Regional Service Center for a return authorization number
(RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the equipment is under warranty, repairs or a replacement will be made in
accordance with the warranty policy set forth above. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.
Call 800-492-1212 (inside the USA) or 610-777-1374 (outside the USA) for help identifying the
Regional Service Center closest to you.
(Rev. 1/97)
