Keithley S46 User manual

1PA-910 Rev. B / 12-05
S46 Microwave Switch System
High Performance Relay 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. To install a relay, refer to “Relay kits” on page 1 for a description of the kits and then
follow the applicable installation instructions.
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: Use only the parts specified in Table 1 of this guide when servicing the
equipment. Use of improper parts may expose the operator to hazard-
ous voltages that could result in personal injury or death.
Table 1
S46 relay kits
Relay kit
model number
(Description)
Relay
location Kit parts summary (Quantity) Keithley part number Installation reference
S46-SPDT-KIT-R
(18GHz SPDT)
1 to 8 4-40 ×5/8 PPH screws (2) 4-40X5/8PPH “18, 26.5, and 40GHZ Relay 1-8
installation” on page 2
SPDT relay (1) S40-0154
SPDT bracket (1) SYS46-314A
Connecting cable (1) SYS46-311C
S46-SP4T-KIT-R
(18GHz SP4T)
A to D 4-40 ×1/4 PPHSEM screws (2) 4-40X1/4PPHSEM “18GHz, 26.5 and 40GHz Relay
A-D installation” on page 3
SP4T relay (1) RL-282-2
Ribbon cable (1) CA-286-1B
S46-SP6T-KIT-R
(18GHz SP6T)
A to D 4-40 ×1/4 PPHSEM screws (2) 4-40X1/4PPHSEM “18GHz, 26.5 and 40GHz Relay
A-D installation” on page 3
SP6T relay (1) RL-282-1
Ribbon cable (1) CA-286-1B
S46-SPDT-KIT-26
(26.5GHz SPDT)
1 to 8 4-40 ×5/8 PPH screws (2) 4-40X5/8PPH “18, 26.5, and 40GHZ Relay 1-8
installation” on page 2
SPDT relay (1) RL-308
SPDT bracket (1) SYS46-314A
Connecting cable (1) SYS46-311C
S46-SP4T-KIT-26
(26.5GHz SP4T)
A to D SP4T relay (1) RL-312 “18GHz, 26.5 and 40GHz Relay
A-D installation” on page 3
Ribbon cable (1) S46-U100-350A
S46-SP6T-KIT-26
(26.5GHz SP6T)
A to D SP6T relay (1) RL-309 “18GHz, 26.5 and 40GHz Relay
A-D installation” on page 3
Ribbon cable (1) S46-U100-350A

PA-910 Rev. B / 12-05 2
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.
To find the applicable installation procedure for your specific kit, refer to the Installation reference column contained
in Table 1, and then perform the installation.
18, 26.5, and 40GHZ Relay 1-8 installation
1. Remove the nuts securing the cover plate over the mounting hole where the new relay is to be installed (see
Figure 1).
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 con-
necting 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. Referring to Figure 1, solder the two control wires to the terminals of the relay.
5. Install the relay on the support bracket using the supplied 4-40X5/8PPH screws.
6. Plug the wire connector into the appropriate circuit board connector (see Figure 2).
7. Install the top cover, and then configure the system as covered in “System configuration” on page 3 of this
guide.
Figure 1
RELAY 1-8 installation
S46-SPDT-KIT-40
(40GHz SPDT)
1 to 8 4-40 ×5/8 PPH screws (2) 4-40X5/8PPH “18, 26.5, and 40GHZ Relay 1-8
installation” on page 2
SPDT relay (1) 21409
SPDT bracket (1) SYS46-314A
Connecting cable (1) SYS46-311C
S46-SP4T-KIT-40
(40GHz SP4T)
A to D SP4T relay (1) S40-0013 “18GHz, 26.5 and 40GHz Relay
A-D installation” on page 3
Ribbon cable (1) S46-U100-350A
S46-SP6T-KIT-40
(40GHz SP6T)
A to D SP6T relay (1) S40-0166 “18GHz, 26.5 and 40GHz Relay
A-D installation” on page 3
Ribbon cable (1) S46-U100-350A
Table 1 (Continued)
S46 relay kits
Relay kit
model number
(Description)
Relay
location Kit parts summary (Quantity) Keithley part number Installation reference
Relay
SPDT Bracket
Top Cover
4-40X5/8PPH Screws
S46 Front Panel
Red ire Black ire
Top view of SPDT Relay
(+) ()
NO C NC

3PA-910 Rev. B / 12-05
Figure 2
Relay connector locations
18GHz, 26.5 and 40GHz Relay A-D installation
NOTE: Install 26.5 and 40GHz SP6T with port 6 at 12 o’clock position. Control wiring
changes port orientation—dimple identifies operational port 2.
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 (see Figure 3):
For 18GHz relays—Connect the supplied ribbon cable to the relay securing it with the two 4-
40X1/4PPHSEM screws.
For 26.5 and 40GHz relays—Solder the supplied ribbon cable to the relay control solder pins.
3. Insert the relay in the mounting hole, and then secure it with the four screws removed in step 1.
4. Plug the ribbon connector into the appropriate circuit board connector (see Figure 2).
5. Install the top cover, and then configure the system as covered in “System configuration” on page 3
of this guide.
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
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)
See Section 3 of the S46 Instruction Manual (document number S46-901-01) for detailed programming
information.
Relay
1
2
3
4
5
6
7
8
Connector
J18
J19
J20
J21
J22
J23
J24
J25
Relay
A
B
C
D
Connector
J5
J6
J7
J8
RELAY 18
Connectors
(J18J25)
RELAY AD
Connectors
(J5J8)
RB
J6
RC
J7
RD
J8
R1
J18
R8
J28
To Power
Supply Board
RA
J5

PA-910 Rev. B / 12-05 4
Figure 3
18, 26.5, and 40GHz Relay A-D installation
Ribbon connector
Relay
S46 Front Panel
6
1
2
Cover plate
4-40X1/4PPHSEM
Screws (2 places)
C
1
2
4
3
SP4T
C
2
3
6
5
SP6T
1
4
Relay Front Panel
-4 -3
-2
+C
-1
hite (-4) Violet (-3)
Brown (+28V)
Orange (-1)
S46-U100-350
Control cable
SP4T
Green (-2)
-5 -4
-2
+C
-1
S46-U100-350
Control cable
SP6T
-3
-6
Yellow (-6)
Orange (-1)
Green (-2)
Red (-5)
hite (-4)
Violet (-3)
Brown (+28V)
Control ire Connections
Solder wire end to relay
connections
Relay
S46 Front Panel
6
1
2
Cover plate
18 GHz Relay
26.5 and 40GHz Relay