Market Central SwitchMaster R5000 Series User manual

Copyright©2018. Market Central, Inc. All rights Reserved.
Market Central®and SwitchMaster®are registered trademarks of Market Central, Inc.
SwitchMaster®R5000 Series
Ultra-Compact Ganged A/B Switching System
NOVEMBER 2020
2U HIGH, 19” RACK MOUNT CHASSIS 5000722
CONTROLLER CARD –BASIC RS232/MANUAL (FRONT & REAR CARD SET) 5000764
CONTROLLER CARD –SNMP/ ETHERNET SUPPORT (FRONT & REAR CARD SET) 5000765
CONTROLLER CARD –SNMP EXPANSION (FRONT & REAR CARD SET) 5000790
EXTERNAL P/S ADAPTER CARD (SINGLE SLOT) 5000752
DC POWER SUPPLY CARDS (-48 VOLT) (FRONT & REAR SET) 5000767
SINGLE DC OUTPUT POWER SUPPLY CARD 5000754
POWER SUPPLY CARD (INCLUDES 2 EXTERNAL AC/DC POWER MODULES 5000761) 5100740
EXTERNAL AC/DC POWER SUPPLY MODULE 6000761
RJ45 A/B SWITCH CARD, LATCHING -SUPPORTS UP TO 1 GbE 5000725
RJ45 (10 PIN) A/B SWITCH CARD, LATCHING -SUPPORTS UP TO 1 GbE 5000807
CAT6 RJ45 A/B SWITCH CARD, LATCHING -SUPPORTS UP TO 10 GbE 5000782
CAT6 RJ45 A/B SWITCH CARD, NON-LATCHING -SUPPORTS UP TO 10 GbE 5000786
MULTIMODE FIBER OPTIC A/B SWITCH CARD, ST CONNECTORS, LATCHING 5000737
MULTIMODE FIBER OPTIC A/B SWITCH CARD, SC CONNECTORS, LATCHING 5000772
MULTIMODE FIBER OPTIC A/B SWITCH CARD, ST CONNECTORS, PSEUDO NON-LATCHING 5000735
MULTIMODE FIBER OPTIC A/B SWITCH CARD, SC CONNECTORS, PSEUDO NON-LATCHING 5000726
MULTIMODE FIBER OPTIC A/B SWITCH CARD, ST CONNECTORS, NON-LATCHING 5000803
MULTIMODE FIBER OPTIC A/B SWITCH CARD, SC CONNECTORS, NON-LATCHING 5000804
SINGLEMODE FIBER OPTIC A/B SWITCH CARD, ST CONNECTORS, LATCHING 5000872
SINGLEMODE FIBER OPTIC A/B SWITCH CARD, SC CONNECTORS, LATCHING 5000873
SINGLEMODE FIBER OPTIC A/B SWITCH CARD, ST CONNECTORS, PSEUDO NON-LATCHING 5000874
SINGLEMODE FIBER OPTIC A/B SWITCH CARD, SC CONNECTORS, PSEUDO NON-LATCHING 5000875
SINGLEMODE FIBER OPTIC A/B SWITCH CARD, ST CONNECTORS, NON-LATCHING 5000808
SINGLEMODE FIBER OPTIC A/B SWITCH CARD, SC CONNECTORS, NON-LATCHING 5000882
DB9 A/B SWITCH CARD, LATCHING 5000736
DB15 A/B SWITCH CARD, LATCHING 5000729
DB25 A/B SWITCH CARD, LATCHING 5000730
75 OHM VIDEO F-TYPE A/B SWITCH CARD, LATCHING 5000795
75 OHM VIDEO F-TYPE A/B SWITCH CARD, NON-LATCHING 5000796
RS232/DB25 SIGNAL MONITORING A/B SWITCH CARD, LATCHING 5000856
RS530/DB25 SIGNAL MONITORING A/B SWITCH CARD, LATCHING 5000857
BLANK FRONT/REAR PANEL (2 REQUIRED PER EMPTY SLOT ) 5000766
(lead-free versions of the above items are also available by changing the part # from 5xxxxxx to 6xxxxxx)
Fiber Optic switches are also available with FC or LC connectors.
Market Central
®
www.secureswitch.com
19 North Main Street, Houston, PA 15342 USA
412.494.2800 CAGE 1BGJ7

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R5000 A/B SWITCHING SYSTEM Page 2of 28
1. Specifications
Connectors:
RJ45 A/B SWITCH CARD –(3) RJ45 connectors (8 or 10 pin depending on model)
CAT6 RJ45 A/B SWITCH CARD –(3) CAT6 RJ45 connectors
FIBER OPTIC A/B SWITCH CARDS –(3) Duplex fiber optic SC or ST receptacles (FC and LC also available)
DB9 A/B SWITCH CARD –(3) DB9 female connectors (male optional)
DB15 A/B SWITCH CARD –(3) DB15 female connectors (male optional)
DB25 A/B SWITCH CARD –(3) DB25 female connectors (male optional)
DB25 SIGNAL MONITORING A/B SWITCH CARD –DB25 female (port C), DB25 male (ports A & B)
F-TYPE A/B SWITCH CARD –(3) female F type connectors
CONTROLLER CARD –(1) RJ45, (2) RJ11
EXTERNAL POWER SUPPLY ADAPTER CARD –(2) two pin Molex connectors, (2) two position terminal block
INTERNAL DC POWER SUPPLY CARD –(2) three position terminal blocks
Indicators:
A/B SWITCH CARDS –(2) LED, one for A, one for B
CONTROLLER CARD –(2) LED, one for power, one for status
EXTERNAL POWER SUPPLY ADAPTER CARD –(2) LED, one power indicator for each external power supply
INTERNAL DC POWER SUPPLY CARD –(1) LED, power indicator
DB25 SIGNAL MONITORING A/B SWITCH CARD –(6) LEDs, A, B, TxD, RxD, RTS, DCD
Switches:
A/B SWITCH CARDS –(1) momentary toggle switch, (1) 8-position dip-switch
CONTROLLER CARD –(1) momentary toggle switch, (1) 8-position dipswitch, (1) momentary push-button switch,
and (1) key-lock switch.
DB25 SIGNAL MONITORING A/B SWITCH CARD –(1) momentary toggle switch, (2) 8-position dip-switch
Ethernet Management Interface (SNMP/Ethernet Controller Card only):
10Base-T, Half-Duplex, does not support Auto MDI-X
Power:
RJ45 A/B SWITCH CARD –12 VDC, 40 mA normal, additional 92 mA max while switching.
CAT6 RJ45 A/B SWITCH CARD –12 VDC, 40 mA normal, additional 92 mA max while switching.
FIBER OPTIC A/B SWITCH CARD, PSEUDO NON-LATCHING –12 VDC, 40 mA in A position, 120 mA max
in B position, additional 13 mA max while switching.
FIBER OPTIC A/B SWITCH CARD, NON-LATCHING –12 VDC, 40 mA in A position, 133 mA max in B
position.
FIBER OPTIC A/B SWITCH CARD, LATCHING –12 VDC, 40 mA normal, additional 80 mA max while
switching.
DB9 A/B SWITCH CARD –12 VDC, 40 mA normal, additional 92 mA max while switching.
DB15 A/B SWITCH CARD –12 VDC, 40 mA normal, additional 147 mA max while switching.
DB25 A/B SWITCH CARD –12 VDC, 40 mA normal, additional 239 mA max while switching.
RS232/DB25 SIGNAL MONITORING A/B SWITCH CARD –12 VDC, 40 mA normal, additional 239 mA max
while switching
RS530/DB25 SIGNAL MONITORING A/B SWITCH CARD –12 VDC, 100 mA normal, additional 239 mA max
while switching
F-Type A/B SWITCH CARD, LATCHING –12VDC, 40 mA normal, additional 52 mA max while switching.
F-Type A/B SWITCH CARD, NON-LATCHING –12VDC, 40 mA in A position, 92 mA max in B position.
CONTROLLER CARD –12 VDC, 100 mA normal, additional 250 mA with Ethernet module.
The rack may be powered using the Internal DC Power Supply Card (requires external 36 –60 VDC source), and/or
using the External Power Supply Adapter Card with one or two external (90 –264 VAC, 47 –63 Hz input, 12 VDC,
5A output) power supply modules. Two or more power supplies may be used in a single rack for redundancy.

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R5000 A/B SWITCHING SYSTEM Page 3of 28
Rack Size:
RACK –18 card slots, 3.5” H x 19” W x 12.5” D (including handles and connectors)
RJ45 A/B SWITCH CARD –one slot (0.937 inches wide)
CAT6 RJ45 A/B SWITCH CARD –one slot (0.937 inches wide)
FIBER OPTIC A/B SWITCH CARDS –one slot (0.937 inches wide)
DB9 A/B SWITCH CARD –two slots (1.875 inches wide)
DB15 A/B SWITCH CARD –three slots (2.812 inches wide)
DB25 A/B SWITCH CARD –three slots (2.812 inches wide)
DB25 SIGNAL MONITORING A/B SWITCH CARD –three slots (2.812 inches wide)
F-TYPE A/B SWITCH CARD –one slot (0.937 inches wide)
CONTROLLER CARD –one slot (0.937 inches wide)
EXTERNAL POWER SUPPLY ADAPTER CARD -one slot (0.937 inches wide)
INTERNAL DC POWER SUPPLY CARD -two slots (1.875 inches wide)
Optical Wavelength: 800 through 1600 nm (latching multimode models)
850 and 1310 nm (non-latching multimode models)
1310 and 1550 nm (latching and non-latching single mode models)
Insertion Loss: 2.0 dB maximum (multimode models)
1.5 dB maximum (single mode models)
Optical Isolation: 35 dB minimum (multimode models)
55 dB minimum (single mode models)
Environment:
TEMPERATURE 0° to 40° C operating, -10° to 70° C non-operating
HUMIDITY up to 80%,non-condensing
ALTITUDE 40,000 ft maximum

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R5000 A/B SWITCHING SYSTEM Page 4of 28
2. Introduction
The R5000 SwitchMaster®Switching System is a 2U 19” rack style chassis containing multiple A/B Switch Cards.
Each switch card connects port A or port B to port C, through latching or non-latching telecommunication relays or
fiber optic switch mechanisms. For models using latching mechanisms, the connection state will be maintained if
power fails or is removed. Non-latching versions will revert to the port C to port A connection state when power is
lost, and will remain in that state when power is restored until a new switch command is received. Pseudo Non-
latching fiber optic switch cards fall back to the “Port C to Port A” connection when power fails or is removed.
When power is re-applied, the optical switch in a pseudo non-latching fiber optic switch card will reconnect port C
to the port (A or B) that was selected prior to the loss of power. The non-latching styles of fiber optic switch cards
are often used when a fall-back or “failover” style of connection scheme is desired in the event of power failure.
The R5000 rack has 18 slots and can accept any mix of switch cards, power supply cards, and one Controller Card
(one required per chassis). Any type of card can be installed in any slot in the R5000 rack, allowing for maximum
flexibility of cable routing etc. If a single slot power supply card (such as the 5100740) is used, the rack can hold up
to 16 A/B Switch Cards, and a Controller Card. Each A/B Switch Card can be individually switched, or the entire
rack can be switched from the Controller Card. The Controller Card has a keyed switch to enable and disable
manual switching (disables the front panel toggle switches on the Controller Card and on each switch card). The
Controller Card has two RJ11 ports which provide for serial communications to the rack, and also allow multiple
racks to be daisy-chained together to create a single system that can be controlled by the first rack in the daisy chain.
The Controller Card also provides remote switching capabilities via an RS232 interface or using a +/-12 VDC signal
from a remote toggle switch.
The Controller Card consists of a front pc board assembly and a rear pc board assembly set, and is available in three
different versions (RS232, SNMP/Ethernet, and SNMP Expansion). The RS232 version supports Rack and System
Gang Switching using the manual toggle switches on the Controller Card and A/B Switch Cards, and supports RS232
communicationson the gang-in and gang-out connectors. The RS232 Controller Card allows system level (all cards
in all racks) switching with serial commands (see section 5.1 for additional info).The SNMP/Ethernet capable
version features a RS232 terminal interface which can be used to control individual A/B switch cards, a rack of A/B
switch cards, or system of daisy-chained racks, and to configure the Ethernet port parameters (see section 7 for
additional info). The Ethernet port allows the rack or system of daisy-chained racks (containing the SNMP
Expansion Controller Card) to be controlled using SNMP commands, Telnet commands, or via a built-in html based
web browser interface. There can only be one SNMP/Ethernet capable Controller Card in a daisy-chained system of
racks, and it must be in the first rack in the system. If daisy-chaining one or more racks from an SNMP/Ethernet
capable rack, the additional racks must have an SNMP Expansion Controller Card, which is compatible with the
message format from the SNMP/Ethernet Controller Card.
The SNMP/Ethernet Controller Cards also support SNMP traps or syslog messages (user configurable) for various
events and errors, and can send these alerts to as many as 16 different remote monitoring locations.
The SNMP/Ethernet Controller Cards have an intelligent automatic switching capability. This feature allows the
switching system to be used to monitor a specific Ethernet network connection and to automatically switch all ports
(performs a system switch operation) based on whether the monitored IP address responds to ICMP echo requests
(responds to PINGs) or not. See section 5.5 for additional details.
The DB25 Signal Monitoring switch cards are described in a separate manual.

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R5000 A/B SWITCHING SYSTEM Page 5of 28
3. Configuration
3.1 A/B Switch Card Configuration
Figure 3.1.1 –Typical A/B Switch Card Front & Rear Panels
Each A/B Switch Card has an 8-position DIP switch, used to set the card’s address. Switch position 1 is the least
significant bit, and position 8 is the most significant bit. Set each switch ON (as marked) for a '0', and OFF for a '1'.
Card address 1 for example, would be DIP switch position 1 OFF, and positions 2-8 ON. Card addresses within a
rack, or within a system of daisy-chained racks must be unique and one card MUST be addressed 1. Card address
0x00 is reserved and must not be used. A typical approach is to set rack 0x01, card addresses to 0x01 through 0x10
from left to right within the rack. In the second rack 0x02, set the card addresses to 0x11 through 0x20 and so on.
The Controller Card communicates with the individual switch cards using a multi-drop scheme. If two A/B cards
within the same rack or daisy-chained system of racks have the same address, both will try to respond at the same
time, causing communication errors. Thus, the maximum number of A/B Switch Cards in a daisy-chained system of
racks is limited to 255 switch cards.
3.2 Controller Card Rear PC Board Configuration
Figure 3.2.1 –Controller Card Rear Panel Outline
1
2
3
4
5
6
1
2
3
4
5
6
8
7
6
5
4
3
2
1

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R5000 A/B SWITCHING SYSTEM Page 6of 28
The Controller Card rear pc board assembly has two jumpers for shielding and grounding options. The two 3-
position jumpers are positioned such that pin 1 is toward the card edge connector, and pin 3 is toward the RJ11
connectors. Each 3-position jumper has a 2-position shunt, used to connect two of the three positions together.
Table 3.2.1 –Controller Card Rear PC Board Jumper Settings
Jumper W1 W2
RJ45 Shield
Connected to Frame Ground *
Open
Pin 1 to Pin 2
Pin 2 to Pin 3
Power Supply Ground
100 Ohm Connection to Frame Ground *
Direct Connection to Frame Ground
Pin 1 to Pin 2
Pin 2 to Pin 3
* Factory Default Positions
Table 3.2.2 –RJ45 (Optional Ethernet Port) Pin Assignment
Pin Signal Name Signal Direction
1Transmit Pair Output
2Transmit Pair Output
3Receive Pair Input
6Receive Pair Input
Table 3.2.3 –RJ11 GANG-IN Port Pin Assignment
Pin Signal Name Signal Direction
5Signal Ground Not Applicable
4Transmit Data / V+ Output / Output
3Receive Data / V-Input / Output
2System Control (OPEN,+12,-12) Input and Output
Note: The functions of pins 3 and 4, on the GANG-IN port, are set using jumpers on the front card. They can be
configured as TXD and RXD for serial communication, or as V+ and V-to control the system control input with a
remote toggle switch. The connections to V+ and V-are through 1 K ohm resistors. The System Control signal is
used as an input and an output. As an Input signal it is normally open. This input is driven to +12 VDC to switch
the system to A, and is driven to –12 VDC to switch the system to B. As an output, this signal is driven to +10 VDC
when the user initiates a system switch to A, and is driven to –10 VDC when the user initiates a system switch to B.
Table 3.2.4 –RJ11 GANG-OUT Port Pin Assignment
Pin Signal Name Signal Direction
5No Connection Not Applicable
4Transmit Data Output
3Receive Data Input
2Signal Ground Not Applicable
Note: A standard RJ11 male/male crossover cable is required to connect from the gang-out port on one rack to the
gang-in port on the next.

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R5000 A/B SWITCHING SYSTEM Page 7of 28
3.3 Controller Card Front PC Board Configuration
The Controller Card front pc board has an 8-position dipswitch and four jumpers for user configurable options. The
four 3-position jumpers are positioned such that pin 1 is toward the front panel, and pin 3 is toward the rear of the
card. Each 3-position jumper has a 2-position shunt, used to connect two of the three positions together.
Table 3.3.1 –Controller Card Front PC Board Jumper W1 and W2 Settings
Jumper W1 W2
Gang-In Pin 3
Connected to TXD *
Connected to V+ through 1K
Pin 1 to Pin 2
Pin 2 to Pin 3
Gang-In Pin 4
Connected to RXD *
Connected to V-through 1K
Pin 1 to Pin 2
Pin 2 to Pin 3
* Factory Default Setting
Jumpers W1 and W2 function as a pair to configure the gang-in port. Refer to table 3.2.3 for the GANG-IN port pin
assignment. Connect to TXD and RXD to support RS-232 serial communications, or connect to V+ and V-through
1 K ohm resistors to control the system control input with a remote toggle switch. Note that the serial port is
required for setup of the network parameters.
Table 3.3.2 –Controller Card Front PC Board Jumper W4 and W5 Settings
Jumper W4 W5
Input Port Source
Normal RS-232 *
Optional SNMP/Ethernet version ~
Pin 1 to Pin 2
Pin 2 to Pin 3
Input Port Source
Normal RS-232 *
Optional SNMP/Ethernet version ~
Pin 1 to Pin 2
Pin 2 to Pin 3
* Factory Default Setting –RS232 and SNMP Expansion versions
~ Factory Default Setting –SNMP/Ethernet version
Jumpers W4 and W5 function as a pair to configure the input port source. It should not be necessary to change these
jumpers from their factory set positions. These jumpers configure the source for communications to the internal
processor on the Controller Card. If you have a Controller Card with an optional SNMP/Ethernet module installed,
both jumpers should be set to connect pins 2 and 3. Otherwise both jumpers should be set to connect pins 1 and 2 to
allow the processor to communicate with the RS-232 signals from the GANG-IN port.
The 8-position dipswitch has a different function depending on the type of Controller Card. Refer to Table 3.3.3 for
the RS232 version only.
For the SNMP/Ethernet and SNMP Expansion Controller Cards, the 8-position dipswitch SW2 is used to define the
Controller Card (or rack) address. Rack addresses within the system must be unique, but may be repeated in other
systems. The rack address space and card address space are separate, i.e. racks and cards can have the same address.
It is necessary that address “00” be left unused, and recommended that the racks be assigned addresses “01” through
“FF”. If two racks within the same system have the same address, both will try to respond at the same time, causing
communication errors. Switch position 1 is the least significant bit, and position 8 is the most significant bit. Set
each switch ON (as marked) for a '0', and OFF for a '1'. Address 1 for example would be position 1 OFF, and
positions 2-8 ON.
The SNMP/Ethernet Controller Cards can be supplied with special “universal” firmware that allows the Ethernet
management interface to be enabled or disabled depending on the address DIP switch setting. When the rack
address DIP switch is set to address “1” (binary 00000001), the Ethernet interface is enabled and the unit operates as
a normal SNMP/Ethernet Controller Card. If the rack address DIP switch is set to address 2 or higher, the Ethernet
interface is disabled and the unit operates like a SNMP Expansion Controller Cards, allowing it to be daisy-chain
connected to the GANG-OUT port of another SNMP/Ethernet or SNMP Expansion Controller Card. Please contact
Market Central for additional information regarding the universal firmware.

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R5000 A/B SWITCHING SYSTEM Page 8of 28
Table 3.3.3 –Controller Card Dip Switch Settings (RS232 Version Only)
Switch SW2-1SW2-2SW2-3SW2-4SW2-5SW2-6
Security Character
00N ON ON ON
1OFF ON ON ON
2ON OFF ON ON
3OFF OFF ON ON
4ON ON OFF ON
5OFF ON OFF ON
6ON OFF OFF ON
7OFF OFF OFF ON
8ON ON ON OFF
9OFF ON ON OFF
:ON OFF ON OFF
;OFF OFF ON OFF
<ON ON OFF OFF
=OFF ON OFF OFF
>ON OFF OFF OFF
?OFF * OFF * OFF * OFF *
Security Code Enabled ON
Security Code Disabled OFF *
Safe Mode Enabled ON
Safe Mode Disabled OFF *
* Factory Default Setting
When the security code is enabled (SW2-5 set to ON), the selected security character must precede any serial
commands received at the gang in port of the first rack in the system. The security code must be disabled on all
following racks. Refer to section 5.1 for a list of applicable serial commands.
Safe mode operation (SW2-6 set to ON) prevents switching commands from the gang-in port, allowing only status
request commands. This provides a level of protection against corrupt or spurious data causing unintended switching
in an application where only status is required of the gang-in port. Set safe mode OFF to allow A/B switching from
the gang-in serial port. Safe mode must be disabled (OFF) on racks connected to the gang-out port of another R5000
rack, to allow system switching to occur (otherwise system switching will be blocked from higher level racks).
Dip switch positions 7 and 8 are reserved for future development, and should be left in the OFF position.

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R5000 A/B SWITCHING SYSTEM Page 9of 28
4. Installation
The A/B Switch Cards consist of a single card, which is inserted from the rear of the rack. The Controller Card
consists of a front card and a rear card.
4.1 Controller Card Rear PC Board Installation
4.1.1 Using the card guides, carefully slide the rear card into the rack, until it makes connection to the 8-position
socket on the rack backplane.
4.1.2 Secure the rear card to the rack at the top and bottom of the card, using the screws provided.
4.1.3 Using standard RJ11 male/male crossover cable, connect the gang out from one rack to the gang in connector
on the next if multiple racks are to be daisy-chained together. Repeat this step until all racks have been
connected.
4.2 Controller Card Front PC Board Installation
4.2.1 Using the card guides, carefully slide the front card into the rack, until it makes connection to the 36-position
card edge connector on the rear card.
4.2.2 Secure the front card to the rack at the top and bottom of the card, using the screws provided.
4.3 A/B Switch Card Installation
4.3.1 From the rear of the rack, using the card guides, carefully slide the card into the rack, until it makes
connection to the 8-position socket on the rack backplane.
4.3.2 Secure the rear card to the rack at the top and bottom of the card, using the screws provided.
4.3.3 If not already in place, secure the front panel to the rack, using the screws provided.
5. Operation
When power is applied to the Controller Card, the PWR LED should illuminate.
When power is applied to the A/B Switch Card, either the "A" LED or the "B" LED should illuminate to indicate the
currently connected port.
When the Key-Lock switch on the Controller Card is OFF, the manual toggle switches on the Controller Card and all
the A/B Switch Cards in the rack will be disabled. Note that the rack may still switch in response to a command
received on the RS232 Gang-In port, or the Ethernet port.
When the Key-Lock switch on the Controller Card is ON, the manual toggle switches in the rack function normally.
The toggle switches on the A/B Switch Cards are used to switch only that card. Hold the switch in the “A” position
to connect Port A to Port C. The “A” LED will illuminate when the switch operation has been completed. Release
the switch when switching has finished. Hold the switch in the “B” position to connect Port B to Port C. The “B”
LED will illuminate when the switch operation has been completed. Release the switch when switching has finished.
The toggle switch on the Controller Card is used to switch all cards in the rack, and is operated in the same fashion
as the individual toggle switches on the A/B Switch Cards. To switch an entire system of daisy-chained racks, hold
the “system” push-button while operating the toggle switch on the Controller Card.
The Controller Card STAT LED should blink under the following conditions:
The front panel control switches are used to initiate a “rack” or “system” level switching operation.
The Controller Card received a switch command on the RS232 Gang-In port or the Ethernet port.

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R5000 A/B SWITCHING SYSTEM Page 10 of 28
5.1 RS-232 Serial Switching
The RS232 version of the Controller Card allows the user to remotely switch all of the cards in a rack or system of
daisy-chained racks using the serial commands listed in Table 5.1.1 below. The SNMP/Ethernet version of the
Controller Card does not support the one character serial commands listed in Table 5.1.1 below, but instead uses the
enhanced console commands listed in Section 7 of this manual. Also note that the data rate of the Gang-In port
increases to 9600 bps for the SNMP/Ethernet version of Controller Card. The SNMP Expansion Controller Card
does not support the one character serial commands listed in Table 5.1.1 below, but will pass these commands
through to the cards in the rack and to subsequent racks in the system.
Table 5.1.1 –RS-232 System Switching Commands (RS232 version of Controller Card)
Command Description
A <CR> Switch “system” to A
B <CR> Switch “system” to B
S <CR> Request “status”
Notes:
1. The RS232 terminal device connected to the RS232 version of Controller Card’s Gang-In port must be set to
2400 Baud, No Parity, 8 Data Bits, 1 Stop Bit. Connect using the supplied DB9 to RJ11 adapter and RJ11 to
RJ11 crossover cable.
2. The one character commands above are CASE SENSITIVE, and must be followed by a carriage return. Refer
to table 3.3.3 for a list of optional “security” characters which may precede these commands.
3. Note: These RS232 commands only allow control of the entire system, thus the status of all cards in the system
should be the same. Therefore, only one card (address 0x01) in the first rack will respond to the “S” status
command. If there is no card with address 0x01 in the first rack, there will be no response to the status
command.
5.2 “SYSTEM” Switching Using the Gang-In System Control Signal
The System Control signal is used as an input and an output. As an Input signal it is normally open. This input is
driven to +12 VDC to switch the system to A, and is driven to –12 VDC to switch the system to B. The input circuit
requires approximately 1 mA to operate properly.
As an output, this signal is driven to +10 VDC when the user initiates a system switch to A, and is driven to –10
VDC when the user initiates a system switch to B. To protect the output circuits, the output goes through a 1 K ohm
resistor. Therefore, this output should not be used to drive a large load.
The gang-in connector normally accepts RS-232 input signals, but can be configured to supply +12 VDC and –12
VDC. Refer to table 3.3.1 for jumper configuration information. These +12 VDC and –12 VDC outputs are
provided through 1 K ohm resistors, and therefore should not be used to drive large loads. These outputs are
provided to allow system switching, using only a remote contact. It is recommended that a momentary toggle switch
be used.
Figure 5.2.1 System Switching, Using a Remote Momentary Toggle Switch