Keithley Instruments
S46 Microwave Switch System
Relay kit
(Description)
location
(Quantity)
number
reference
S46-SPDT-KIT-R
1 to 8
4-40 × 5/8 PPH screws (2)
Connecting cable (1)
4-40 x 5/8 PPH
SYS46-311C
Relay 1 through 8
S46-SP4T-KIT-R
A to D
4-40 × 3/16 PPHSEM screws (2)
Ribbon cable (1)
4-40 x 3/16 PPHSEM
CA-286-1B
Relay A through D
Ribbon cable (1)
CA-286-1B
Relay A through D
S46-SPDT-KIT-26
1 to 8
4-40 × 5/8 PPH screws (2)
4-40 x 5/8 PPH
Relay 1 through 8
S46-SP4T-KIT-26
A to D
SP4T relay (1)
RL-312
Relay A through D
(on page 4)
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
tek.com/keithley
Relay Installation Guide
Introduction
This guide contains information on S46 relay installation and system configuration that is necessary after
installing new relays. To install a relay, refer to Relay kits (on page 1
) for a description of the kits and follow the
applicable installation instructions.
Relay kits
Connection and wiring procedures in this document are intended for use by qualified
personnel only. Do not perform these procedures unless qualified to do so. Failure to
recognize and observe normal safety precautions could result in personal injury or death.
Use only the parts specified in the following table when servicing equipment. Use of improper
parts may expose the operator to hazardous voltages that could result in personal injury or
death.
model number
(18 GHz SPDT)
(18 GHz SP4T)
S46-SP6T-KIT-R
(18 GHz SP6T)
(26.5 GHz SPDT)
(26.5 GHz SP4T)
Relay
A to D 4-40 × 3/16 PPHSEM screws (2)
Kit parts summary
SPDT relay (1)
SPDT bracket (1)
SP4T relay (1)
SP6T relay (1)
SPDT relay (1)
SPDT bracket (1)
Connecting cable (1)
Ribbon cable (1)
Keithley part
S40-0154
SYS46-314A
RL-282-2
4-40 x 3/16 PPHSEM
RL-282-1
RL-308
SYS46-314A
SYS46-311C
S46-U100-350A
Installation
installation
(on page 2)
installation
(on page 4)
installation
(on page 4)
installation
(on page 2)
installation
PA-910 Rev. C / December 2019 *PPA-910C* 1
S46 Microwave Switch System Relay Installation Guide
S46-SP6T-KIT-26
A to D
SP6T relay (1)
RL-309
Relay A through D
(on page 4)
S46-SPDT-KIT-40
1 to 8
4-40 × 5/8 PPH screws (2)
Connecting cable (1)
4-40 x 5/8 PPH
SYS46-311C
Relay 1 through 8
S46-SP4T-KIT-40
A to D
SP4T relay (1)
S40-0013
Relay A through D
(on page 4)
S46-SP6T-KIT-40
A to D
SP6T relay (1)
S40-0166
Relay A through D
(on page 4)
(26.5 GHz SP6T)
(40 GHz SPDT)
(40 GHz SP4T)
(40 GHz SP6T)
Ribbon cable (1)
SPDT relay (1)
SPDT bracket (1)
Ribbon cable (1)
Ribbon cable (1)
S46-U100-350A
21409
SYS46-314A
S46-U100-350A
S46-U100-350A
installation
installation
(on page 2)
installation
installation
Installation
Turn off the power and disconnect the line cord before installing the new relays. Failure to
turn off the power and disconnect the line cord before installing the relays may result in
personal injury or death due to electric shock.
Before installing the relays, remove the screws that secure the S46 top cover, and remove the cover.
To find the applicable installation procedure for your specific kit, refer to the Relay kits (on page 1
) section.
Relay 1 through 8 installation
To install the 18, 26.5, or 40 GHz relay
1. Refer to the following figure and remove the four screws securing the cover plate over the mounting hole
where the new relay is to be installed.
2. Install the support SPDT bracket at the relay location securing it with two nuts.
3. Thread the red and black wires from the relay through the PVC Tubing (TX-52-7) (not shown; part of
connecting cable SYS46-311C). The TX-52-7 may be cut to a length that will allow the relay assembly to
be removed without removing the top cover.
4. Refer to the following figure and solder the two control wires to the relay terminals.
2 PA-910 Rev. C / December 2019
S46 Microwave Switch System Relay Installation Guide
Relay
Connector
Relay
Connector
Relay
Connector
1
J18 5 J22 A J5 2 J19 6 J23 B J6 3 J20 7 J24 C J7 4 J21 8 J25 D J8
Figure 1: S46 relay installation
5. Install the relay on the support bracket using the supplied 4-40 X 5/8 PPH screws.
6. Refer to the following table and figure in order to plug the wire connector into the appropriate circuit board
connector.
7. Install the top cover and configure the system as indicated in System configuration (on page 7
).
PA-910 Rev. C / December 2019 3
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