Keithley S46 User manual

PA-912 Rev. B / 11-05
S46 Microwave Switch System
Terminated Teledyne Installation Guide
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
[phone]
www.keithley.com
Introduction
This guide contains information on S46 relay installation and system configuration that is necessary after
installing new relays.
WARNING The information in this section is only intended for qualified service
personnel. Do not attempt to replace parts or otherwise service the
equipment unless you are qualified to do so.
Relay kits
Table 1 summarizes available relay kits and part numbers.
WARNING UseonlythepartsspecifiedinTable 1 of this guide when servicing the
equipment. Use of improper parts may expose the operator to
hazardous voltages that could result in personal injury or death.
Table 1
S46 relay kits
Relay
location Description Relay kit model number Kit parts summary Keithley part number
1 to 8 SPDT RF relay S46-SPDT-KIT-T SPDT terminated relay (1)
Connecting cable (1) S40-0082 SYS46-311C
A to D SP4T RF relay S46-SP4T-KIT-T 4-40 ×1/4 PPHSEM screws (2)
SP4T relay (1)
Ribbon cable (1)
4-40X1/4 PPHSEM
S40-0207
CA-286-1B
A to D SP6T RF relay S46-SP6T-KIT-T 4-40 ×1/4 PPHSEM screws (2)
SP6T relay (1)
Ribbon cable (1)
4-40X1/4 PPHSEM
RL-288-1
CA-286-1B

2PA-912 Rev. B / 11-05
Relay installation
Before installing the relays, remove the screws that secure the S46 top cover, and then remove the cover.
WARNING Disconnect the line cord and all cables from the S46 before removing
the top cover.
RELAY 1-8 installation
1. Unplug line cord, disconnect all cables, and remove the Top Cover.
2. Remove the 6 screws that secure the SPDT relay mounting bracket to the S46 chassis (see
Figure 1).
3. Remove the 2 screws holding the relay spacers in the new relay column.
4. Replace the spacer with the new relay where the new relay is to be installed.
5. Install the 2 screws removed in step 3 in the new relay column.
6. Referring to Figure 2, solder the two control wires to the terminals of the relay.
7. Install the SPDT relay mounting bracket using the screws removed in step 1.
8. Plug the wire connector into the appropriate circuit board connector (see Table 2 and Figure 4 on
page 5).
9. Install the Top Cover, and then configure the system as covered in “System configuration” on
page 6 of this guide.
WARNING Do not power up the system without reinstalling the top cover. Failure
to do so may expose the operator to hazardous voltages that could
result in personal injury or death.

PA-912 Rev. B / 11-05 3
Figure 1
RELAY 1-8 installation
Figure 2
Connecting control wires
to SPDT relay
NO NCONONCO
NO NCO
R1
R1
R1
R1
R1
R1
R1
R1
PWR
ERR
135
246
RA
135
246
RB
135
246
RC
135
246
RD R2 R4 R6 R8
R7R1 R3 R5
Relay
SPDT relay
moun ing bracke
Relay spacer screws
Screw
(6 places)
Top cover
Spacer
S46 Chassis
Red Wire Black Wire
Top view of SPDT Relay
(+) ()
NO
2IN
NC
1

4PA-912 Rev. B / 11-05
RELAY A-D installation
1. Remove the four screws securing the cover plate over the mounting hole where the new relay is to
be installed (see Figure 3).
2. Connect the supplied ribbon cable to the relay securing it with the two 4-40X1/4PPHSEM screws.
3. Insert the relay in the mounting hole, and then secure it with the four screws.
4. Plug the ribbon connector into the appropriate circuit board connector (see Table 2 and Figure 4
on page 5).
5. Install the top cover, and then configure the system as covered in “System configuration” on page 6
of this guide.
WARNING Do not power up the system without reinstalling the top cover. Failure
to do so may expose the operator to hazardous voltages that could
result in personal injury or death.
Figure 3
RELAY A-D installation
RELAY B RELAY C RELAY D
RELAY A
Ribbon connec or
Relay
Top cover
4-40X1/4PPHSEM screws
(2 places)
Cover pla e screws
(4 places)
J
1
J
6
J
5
J
4
J
3
J
2

PA-912 Rev. B / 11-05 5
Board connector reference
Table 2
Relay connectors
Figure 4
Relay connector locations
Relay Connector Relay Connector
A J5 1 J18
B J6 2 J19
C J7 3 J20
D J8 4 J21
—— 5 J22
—— 6 J23
—— 7 J24
—— 8 J25
RELAY 18
Connec ors
(J18J25)
RELAY AD
Connec ors
(J5J8)
To Power Supply Board

6PA-912 Rev. B / 11-05
System configuration
After installing the new relays, you must program the S46 for the new relay configuration with the following
command:
:ROUT:CONF:CPOL <clist>
<clist> is defined as follows:
clist = (@0 | 3-6, 0 | 3-6, 0 | 3-6, 0 | 3-6, 0 | 1, ... 0 | 1)
Relay: A B C D 1 ... 8
See Section 3 of the S46 Instruction Manual (document number S46-901-01) for detailed programming
information.
NOTE All switch locations must be included in the <clist> whether or not all
locations are populated. The numeric value (1 or 3-6) indicates the
number of throws, while a value of 0 indicates that a location is not
populated.
For example, if RELAY A and RELAY B are SP6T, RELAY 1 and RELAY
2 are SPDTs, and all other locations are not populated, the command
syntax would be:
:ROUT:CONF:CPOL (@6,6,0,0,1,1,0,0,0,0,0,0)