Toshiba Strata Dk14, Dk40i, Dk424 Installation And Maintenance Manual

							DK424 Configuration
System Capacity
Strata DK I&M     5/994-9
DK424 Configuration
Table 4-12 Digital, Tie, DID, Ground/Loop Start Digital T1 and ISDN PRI Lines Maximum Combined Capacities Table 4-10 CO Loop Start Analog Lines with Caller ID Maximum Capacities
1 Cabinet 
RCTUA2 Cabinets 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations
8 24244040565672728888104136152
16 56 32 72 48 88 64 104 80 120 128 168
8 72 24 88 40 104 56 120 72 136 120 184
16 104 32 120 48 136 64 152 112 200
24 136 40 152 56 168 104 216
32 168 48 184 96 232
40 200 88 248
80 264
Table 4-11 CO Ground Start with Caller ID, DID and/or Tie Analog Lines Maximum Combined Capacities
1 Cabinet 
RCTUA2 Cabinets 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations
8 1620243240444856646872104112
16 40 28 48 40 64 52 72 64 88 100 120
8 64246436724888609696136
16 88 32 88 44 96 56 112 92 144
12 96 28 96 40 112 52 120 88 160
24 112 36 120 48 136 84 168
20 120 32 136 44 144 80 184
16 136 28 144 40 160 76 192
24 160 36 168 72 208
32 184 68 216
28 192 64 232
60 240
56 256
2 Cabinets 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations
48 56 72 88 112 112 120 152 144 144 1921
1. The maximum number of PRI lines for 2 cabinets is 47, 3~6 cabinets is 141 and 7 cabinets is 188.240
40 64 64 96 96 120 112 160 120 168 184 248
24 72 48 104 88 128 96 168 112 176 168 264
16 80 40 112 72 136 88 176 96 192 160 272
24 120 64 144 72 184 88 200 144 288
16 128 48 152 64 192 72 216 136 296
40 160 48 200 64 224 120 312
24 168 40 208 48 240 112 320
16 176 24 216— — 96 336
NoteslT1 lines can be in increments of 8, 16 and/or 24.
lPRI channels can be in increments of 23B+1D or 47B + 1D. Each B channel represents a PRI CO line. 
						

							DK424 Configuration
System Capacity
4-10Strata DK I&M    5/99
Tables 4-13~4-18 show system maximum capacity examples with ISDN BRI (S/T and/or U) 
circuits.
Table 4-13 RCTUA Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
Table 4-14 RCTUBA/BB Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
BRI Station 
Circuits1BRI Station
B channels1Other Station 
Circuits3BRI Line 
Circuits4BRI Line
B channels4Other Line 
Circuits5
8 2 16 216 0 0 0
612 1624 0
510 1636 0
4 8 164 
28 20
4 8 1624 4
3 6 1612 8
2 4 2424 8
1 2 2812 12
BRI Station 
Circuits 1BRI Station
B channels 1Other Station 
Circuits 3BRI Line 
Circuits 4BRI Line
B channels 4Other
Line Circuits 5
16 232 232 8 216 20
12 24 40 8 16 8
10 20 40 8 16 12
 8 16 48 8 16 16
 8 16 48 6 12 20
 816 5648 24
 816 5624 28
 6 12 56 6 12 24
 612 5648 28
 612 6424 32
 4 8 64 4 8 32
 4 8 64 2 4 32
 2 4 72 2 4 40
1. Each BRI circuit (S/T and/or U-type) provides two B channels plus one D channel and reduces the system 
capacity by two station ports and two CO lines. Each (S/T) BRI station circuit allows up to eight TE-1 and TA 
devices to share the BRI B channels (two simultaneous calls maximum per BRI circuit.). Each BRI-U circuit 
supports one TE-1 or TA device.
2. Maximum BRI capacity.
3. Other stations include Toshiba digital and electronic telephones, or attendant consoles, standard telephones and 
devices.
4. BRI S/T circuits are available with RBSU/RBSS PCBs and BRI-U circuits are available with RBUU/RBUS 
PCBs. ISDN BRI PCBs will be available with a future release of DK424 software. Each BRI line circuit (S/T 
or U) provides two BRI CO lines (B channels) for incoming/outgoing calls.
5. Other lines include analog and digital (T1 or PRI) loop start, ground start, DID, and Tie lines. 
						

							DK424 Configuration
System Capacity
Strata DK I&M     5/994-11
DK424 Configuration
Table 4-15 RCTUC/D Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
Table 4-16 RCTUE/F Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
BRI Station 
Circuits 1BRI Station 
B channels 1Other Station 
Circuits 3BRI Line 
Circuits 4BRI Line
B channels 4Other Line 
Circuits 5
40 280 2144 82 16 248
30 60 164 8 16 68
20 40 184 8 16 88
16 32 192 8 16 96
12 24 200 8 16 104
8 16 208 8 16 112
8 16 216 4 8 120
8 16 216 2 4 124
4 8 228 2 4 132
BRI Station 
Circuits 1BRI Station 
B channels 1Other Station 
Circuits 3BRI Line 
Circuits 4BRI Line
B channels 4Other Line Circuits 5
64 2128 219 28 216 256
50 100 216 8 16 84
40 80 240 8 16 104
30 60 256 8 16 124
20 40 280 8 16 144
16 32 288 8 16 152
8 16 304 8 16 168
8 16 312 4 8 176
8 16 312 2 4 180
4 8 320 4 8 184
4 8 320 2 4 188
2 4 328 2 4 192
1. Each BRI circuit (S/T and/or U-type) provides two B channels plus one D channel and reduces the system 
capacity by two station ports and two CO lines. Each (S/T) BRI station circuit allows up to eight TE-1 and TA 
devices to share the BRI B channels (two simultaneous calls maximum per BRI circuit). Each BRI-U circuit 
supports one TE-1 or TA device.
2. Maximum BRI capacity.
3. Conventional stations include Toshiba digital and electronic telephones, or attendant consoles, standard 
telephones and devices.
4. BRI S/T circuits are available with RBSU/RBSS PCBs and BRI-U circuits are available with RBUU/RBUS 
PCBs. ISDN BRI PCBs will be available with a future release of DK424 software. Each BRI line circuit (S/T or 
U) provides two BRI CO lines (channels) for incoming/outgoing calls.
5. Conventional lines include analog and digital (T1 or PRI) loop start, ground start, DID, and Tie lines. 
						

							DK424 Configuration
Printed Circuit Boards
4-12Strata DK I&M    5/99
Printed Circuit Boards
The system interfaces with CO lines, stations, and peripheral devices via PCBs that plug into the 
Base and Expansion Cabinet slots and subassembly PCBs, that mount onto the plug-in type PCBs. 
Refer to Table 4-17 for a list of station and console PCBs supported by the DK424.
Table 4-17 PCB Circuits, Interface Options and Connectors 
PCBSubassemblyCircuitsInterface OptionsConnector
RPTU(DK424 only)
1 circuit/ISDN PRI 
(23 B channels/1 D channel)POTS
FX
Tie (senderized)
Tie (cut through)
OUTWATS (intra-LATA)
OUTWATS (inter-LATA)
InWATSRJ48C or RJ48X
ISDN TIA-568A
RBSU2 ISDN BRI S/T point circuits (NT 
or TE). Each circuit is 2B+1D. 
(Host for the RBSS)Network and/or station side RJ45, ISDN TIA-568A
attaches to 
RBSURBSS2 ISDN BRI, S point circuits (2B+D 
each)Station side only
1 RBSS subassembly per RBSURJ45, ISDN TIA-568A
RBUU(DK424 only) 2 ISDN BRI, U point 
circuits (2B+D each). Host for the 
RBUS. (Release 4.2)Network and/or station side RJ45, ISDN TIA-568A
attaches to 
RBUURBUS2 ISDN BRI, U point circuits 
(2B+D each) subassembly for the 
RBUU. (Release 4.2)Network and/or station side
1 RBUS subassembly per RBUU.RJ45, ISDN TIA-568A
RDTU2 Applies to DK424 only.
1~8, 1~16, or 1~24 channels 
(lines), depends on system 
programmingLoop start lines
Ground start lines
Tie lines (wink or immediate)
DID/DOD lines (wink or immediate)2-pair amphenol
RJ48M
(All PCB amphenol 
connectors are female)
RMCU2 E911 CAMA circuits with the 1 
RCMS or 4 with 2 RCMSsE911 CAMA lines
RJ11C modular
attaches to 
RMCURCMS2 E911 CAMA circuitsUp to 2 RCMSs per RMCU for 4 
CAMA lines max.
REMU 4 Tie line circuitsE&M Tie lines
2- or 4-wire transmission
Type I signaling
Type II signaling
Immediate start
Wink start REMU (8-wire modular jack)
2- or 4-wire/type I or II
KCDU(DK40i only)
2 CO line circuits/
4 digital telephone circuitsCO loop start lines
Digital circuits same as PDKU, 
except no DDSSRJ14C modular (CO Line 
circuits)
25-pair amphenol (digital 
phone circuits)
RCOU4 CO line circuits (lines)
With RCOS:
8 CO line circuits (lines)CO loop start lines
RJ14C modular
attaches to 
RCOURCOSProvides four additional Loop 
Start CO lines. 1 RCOS subassembly per RCOU 
						

							DK424 Configuration
Printed Circuit Boards
Strata DK I&M     5/994-13
DK424 Configuration
RCIU24 circuits
With RCIS: 8 circuitsLoop or Ground Start Lines with 
Caller ID. Requires: RCOU, RGLU2 
or PCOU
RJ14C modular
attaches to 
RCIU2RCISUsed with RCOU/RCOS, PCOU, 
and RGLU2 CO line PCBs to 
provide 4 Caller ID circuits.1 RCIS subassembly per RCIU2
RDDU4 DID circuits DID Lines RJ14C modular
RGLU24 line circuits  Loop or ground start lines RJ14C modular
PIOU, 
PIOUS, 
PEPU, 
RSSUA PIOU or PIOUS can use an 
IMDUACD/SMIS (DK424 only, except 
RCTUA)
SMDI for Voice Mail
SMDR printer or call accounting 
machine
PC or maintenance terminal (local 
or remote)25-pair amphenol (PIOU or 
PEPU)
Spring clip terminal (PIOUS) 
Two 3-pair modular (TTY/
SMDR/SMDI/SMIS)
(All PCB amphenol 
connectors are female)
attaches to 
PIOU and 
PIOUSIMDUProvides remote maintenance 300 
bps or 1200 bps full-duplex modem 
for DKAdmin or DKBackup. 1 per 
PIOU/PIOUS. None
RSTU28 standard telephone circuitsStandard telephones
Voice mail ports
Off-premises stations
Other similar devices
Alternate BGM source
Auto Attendant digital announcer
Message Waiting lamp (RSTU2 
only)
Fax machines
ACD Announcer
Strata Airlink wireless telephones25-pair amphenol
(All PCB amphenol 
connectors are female)
attaches to 
RSTU2 and 
RDSUR48S48VDC circuit for up to 8 standard 
telephone circuitsOptionally interfaces to the RSTU2 
and RDSU to extend loop length of 
standard telephones from 600 
ohms to 1200 ohms.None
RDSUWithout RSTS:
2 standard telephone/
4 digital telephone circuits
With RSTS:
4 standard telephone/
4 digital telephone circuitsDigital: same as PDKU, except no 
DDSS console
Standard: same as RSTU 
(standard Message Waiting not 
available)25-pair amphenol
attaches to 
RSTU2 and 
RDSURSTSProvides two additional standard 
telephone circuits1 maximum per RDSU None
PESU2 standard telephone circuits/
4 electronic telephone circuits 
(standard/electronic telephone 
ports)Standard: same as KSTU2
Electronic: same as PEKU, except 
PESU does not support HDSS 
console25-pair amphenol
RATU(DK424 only)
4 PC attendant PC console 
circuitsPC attendant console
Conventional attendant console25-pair amphenol
Table 4-17 PCB Circuits, Interface Options and Connectors (continued)
PCBSubassemblyCircuitsInterface OptionsConnector 
						

							DK424 Configuration
Printed Circuit Boards
4-14Strata DK I&M    5/99
PDKU28 digital telephone circuitsDigital telephones (with or without 
RPCI-DI, DVSU, DADMs, or digital 
cordless telephone)
Stand-alone digital cordless 
telephone
DDSS console
PDIU-DS
DDCB25-pair amphenol
Stratagy DK2, 4, 6, or 8 VM ports
All of the above Stratagy DK 
systems use 8 station ports in the 
DK40i and DK424 softwareNone None
PEKU8 electronic telephone circuitsElectronic telephones
HDSS console
Alternate BGM source
EOCU PCB for OCA
External conference amplifier
HDCB25-pair amphenol
(All PCB amphenol 
connectors are Female)
attaches to 
PEKU or 
PESUEOCUProvides Speaker OCA path for 8 
circuits on PEKU or 4 circuits on 
PESU. (Handset OCA is not 
available on EKTs.)1 for PEKU or PESU that supports 
Speaker OCA
RSIU
(DK424 only)Up to 4 interface ports when 
installed with the optional RSIS or 
RMDS piggy-back PCBs.ACD/SMIS
SMDI for voice mail
SMDR printer or call accounting 
machine
PC or maintenance terminal (local 
or remote)One 3-pair modular (TTY/
SMDR/SMDI/SMIS)
attaches to 
RSIU
RSIS, RS-232 
interface
RMDS
(Modem/
RS-232)
(DK424 only)Up to 3 RSISs
...or 
1 RMDS and 
2 RSISs per RSIUProvides up to four interface ports 
(RS-232 and modem) for system 
interface with:
RMDS (1200 or 2400 bps)
Voice Mail SMDI
ACD/SMIS
SMDR
Local or Remote Maintenance for 
DKAdmin or DKBackup PC.One 3-pair modular per 
RSIS (RS-232), RMDS 
(Modem/RS-232)
RWIU
4 RJ11 jacks to support 4 Strata 
AirLink Integrated Base StationsDigital Wireless Handsets: same as 
PDKU, except no DDSS console, 
Stand-alone cordless telephone, 
PDIU-DS, or DDCBNone
Table 4-17 PCB Circuits, Interface Options and Connectors (continued)
PCBSubassemblyCircuitsInterface OptionsConnector 
						

							DK424 Configuration
Printed Circuit Boards
Strata DK I&M     5/994-15
DK424 Configuration
RKYS Feature Key Upgrades
The system can be upgraded for built-in AA, Automatic Call Distribution (ACD), Software 
Management Information System (SMIS) for ACD with feature keys that attach to the common 
control unit. See Table 4-18 for a list of features provided by RKYS feature keys.
Table 4-18 RKYS Features
Option Interface PCBs for the DK424 are listed in Table 4-19. Refer to Chapter 10 – Peripherals 
for further information on these options.
Feature(s) Provided RKYS1RKYS2RKYS3Common Control Unit
Built-in Auto Attendant X X X Applies to all RCTUs
ACD X X RCTUBA/BB, RCTUC/D or RCTUE/F
ACD with a SMIS application X RCTUBA/BB, RCTUC/D or RCTUE/F 
Table 4-19 DK424 Interface PCB Options
Interface OptionsRSSU1
1. PIOU, PIOUS, and RSSU each provide one TTY port which can be flexibly programmed for the features marked with X.
RSIU/RSIS can provide up to four flexible TTY/SMDR ports.
PIOU1PIOUS1PEPURSIU/
RSIS1
Zone page interface (unamplified, 4 zones)X
Unamplified page output (single zone, 600 ohms, duplex)XXX
Amplified page output (single zone, 3 watts, 8 ohms)XX
Night transfer or Music-on-hold control relayXXX
Door lock or external amplifier control relayXXX
Alarm SensorXX
Remote maintenance modem subassembly (IMDU or RMDS) 
(disables TTY output when they are piggy-backed onto the 
PIOU/PIOUS or RSIU/RSIS cards)
2
2. Maintenance modem, ACD/SMIS, Insight DK, Voice Mail, SMDI and DKAdmin PC Interface each require a separate TTY
output. PIOU, PIOUS, and RSSU provide one TTY output each. RSIU with RSIS PCBs provides up to four TTY outputs.
X(IMDU)X(IMDU)X(IMDU)
Remote Maintenance using customer-provided external 
modem (requires TTY output port)2XXXX
SMDR output (RS-232/6-wire modular connector)X3
3. SMDR output will function simultaneously on the same PIOU or PIOUS with one of the following: DKAdmin, remote
modem, SMIS for ACD, Insight DK, or SMDI features.
X3X
MIS for ACD (requires TTY output port)2, 4
4. Insight DK, Call Center Viewer and SMIS for ACD requires that the system processor (RCTU PCB) must be equipped with
an RKYS3 or higher feature key.
XXXX
Voice Mail SMDI (requires TTY output port)2XXX X
StrataControl and/or DKAdmin PC (requires TTY output port)2XXXX 
						

							DK424 Configuration
Telephones
4-16Strata DK I&M    5/99
Telephones
The DK424 system supports Toshiba Proprietary Digital (DKT) and older series Electronic 
Telephones (EKTs). Standard telephones (500 or 2500 series) and devices that require a standard 
telephone line interface (fax, modem, VM, etc.) can also be connected to DK424.
Toshiba provides the following 2000-series Digital Telephones for Strata DK424 systems.
©DKT-2020SD–20-button speakerphone with LCD
©DKT-2010SD–10-button speakerphone with LCD
©DKT-2020S–20-button speakerphone
©DKT-2010H–10-button handsfree answerback telephone
Toshiba telephones can be equipped with optional subassemblies (listed on Page 4-33).
Attendant Position Options
The DK424 provides three options for attendant positions which answer system incoming calls. 
See Table 4-8 for the number of options per RCTU processor. See Table 4-20 for configuration 
considerations.
©PC Attendant Console–used for medium-to-heavy traffic systems where an attendant must 
answer and transfer incoming calls. The PC Attendant Console requires a customer-provided 
PC plus the RATU PCB.
Up to two consoles can be connected on systems with RCTUB or RCTUBA/BB or four with 
RCTUC/D (Release 2 and 3) and RCTUE/F PCBs. The RATU PCB uses four station ports in 
system software. RCTUC/D Release 1 and all RCTUAs do not support the attendant console.
©Direct Station Select (DSS) Console–used for medium traffic systems where an attendant 
must answer and transfer incoming calls. The DSS console must connect to circuit 8 on a 
PDKU PCB.
©Digital Add-On-Module (DADM)–used for medium traffic, smaller systems, where an 
Attendant must answer and transfer incoming calls. The ADM connects to any 2000-series 
digital telephone. The DADM shares the associated telephones circuit so it does not require a 
designated PCB or circuit port (see “DADM” on Page 4-33.) 
						

							DK424 Configuration
Direct Station Selection (DSS) Consoles and Door Phones (MDFBs)
Strata DK I&M     5/994-17
DK424 Configuration
Direct Station Selection (DSS) Consoles and Door 
Phones (MDFBs)
Up to 12 door phones can be installed in a system with DK424 RCTUB, RCTUC/D and 
RCTUE/F, nine with RCTUA. Each is connected to a DDCB or HDCB door phone control box. 
See Table 4-20 for door phone configuration considerations.
Table 4-20 DSS Console and Door Phone Configuration 
Option 
UnitInterface/
PCBDK424 CapacityFunction
DDSS PDKU2 
(Circuit 8)3-RCTUA
4-RCTUBA/BB
8-RCTUC/D
8-RCTUE/FDigital DSS console (DDSS) can be flexibly assigned to designated 
electronic and digital telephone stations: Up to 8-DSS consoles may 
be assigned to a designated electronic or digital telephone station.
It has 60-buttons which are flexibly assigned as CO line, speed dial, 
and DSS (no [PDN] or [PhDN]).
HDSS PEKU 
(Circuits 7 
and 8)3-RCTUA
4-RCTUBA/BB
8-RCTUC/D
8-RCTUE/FElectronic DSS console (HDSS) provides a 60-button console that 
functions with digital or electronic telephones. Buttons are flexibly 
assigned as CO line, speed dial, and DSS (no [PDN] or [PhDN]).
DSS consoles can be flexibly assigned to designated electronic and 
digital telephone stations: Up to 8-DSS consoles may be assigned to 
a designated electronic or digital telephone station.
DDCB PDKU or 
RDSU 
(Circuit 5)4 per system: 
RCTUBA/BB and 
RCTUC/D, RCTUE/F
3 per system: RCTUAEach Digital Door Phone/Lock control (DDCB) interfaces with up to 
three door phones (MDFBs) or two MDFBs and one door lock.
DDCBs/HDCBs can only be connected to Ports 004, 012, 020, and 
028, normally in slots 11, 12, 13, and 14, respectively.
Always install DDCB/HDCB station PCBs (PDKU, RDSU, PEKU, or 
PESU) in slots that have lower slot numbers than RDDU, PEMU, 
REMU2, RATU, or RDTU PCBs.
HDCB PEKU or 
PESU 
(Circuit 5)4 per system: 
RCTUBA/BB and 
RCTUC/D, RCTUE/F
3 per system: RCTUAEach Electronic Door Phone/Lock control (HDCB) provides interface 
for up to three door phones (MDFBs) or two MDFBs and one door 
lock.
DDCBs/HDCBs can only be connected to Ports 004, 012, 020, and 
028, normally in slots 11, 12, 13, and 14, respectively.
Always install DDCB/HDCB station PCBs (PDKU, RDSU, PEKU, or 
PESU) in slots that have lower slot numbers than RDDU, PEMU, 
REMU2, RATU, or RDTU PCBs.
MDFB 
(Door 
Phone)DDCB or 
HDCB12 per system: 
RCTUBA/BB, 
RCTUC/D, RCTUE/F
9 per system: RCTUADoor phone (MDFB) with two-way talk path to system telephones. 
Includes microphone for talkback amplifier with HESB.
Doorbell rings designated digital and electronic telephones.
Notes
DSS (DDSS and HDSS) Console
©No additional hardware is required for DSS consoles.
©DSS consoles are assigned to associated digital and electronic telephones in programming.
©DSS consoles cannot be connected to RDSU or PESU electronic circuits.
Door Phone
©DK424 can support as many as 12 MDFBs. See Table 4-8.
©Each DDCB requires one circuit (Circuit 5) on a PDKU or RDSU, and each HDCB requires one circuit (Circuit 5) on either a PEKU 
or PESU.
©One door lock control can be configured on each DDCB and HDCB in place of one door phone. 
						

							DK424 Configuration
AC and Reserve Power Hardware
4-18Strata DK I&M    5/99
AC and Reserve Power Hardware
Detailed information for AC and reserve battery power installation is described in Chapter 5–
DK424 Cabinet Installation. These optional assemblies may be required, see Table 4-21.
©RBTC1A-2M and PBTC-3M–Battery connecting cables.
©RC7C1A-1.7M–Seventh cabinet battery and data cable kit.
©RBDB2–Battery power distribution box for up to seven cabinets.
©RPSB1 and RPSB2–three-outlet AC power strips, for requirements.
Table 4-21 Power Strip (RPSB) Requirements
Floor Mount Installation Hardware
Floor mounting DK424 requires RFIF and RCCB hardware assemblies; wall mounting DK424 
does not require special hardware (see Table 4-22), but may require a plywood backboard (see 
Chapter 3 – Cabinet Installation).
Quantity of RPSB1 and RPSB2 Power Strips Needed1
1. High current carrying capacity cord for application where local electric codes (or user) requires only one AC cord to exit
four or more cabinets. Toshiba highly recommends using the RPSB2 for two-cabinet installations.
Local Electric Code 
Requirement1 Cabinet 2 Cabinets 3 Cabinets 4 Cabinets 5 Cabinets 6 Cabinets 7 Cabinets
Two AC power cords 
allowed from system.0 - RPSB1
0 - RPSB20 - RPSB1
0 - RPSB21 - RPSB1
0 - RPSB21 - RPSB1
0 - RPSB22 - RPSB1
0 - RPSB22 - RPSB1
0 - RPSB22 - RPSB1
1 - RPSB2
Only one AC power 
cord allowed from 
system.0 - RPSB1
0 - RPSB21 - RPSB1
0 - RPSB21 - RPSB1
0 - RPSB21 - RPSB1
1 - RPSB21 - RPSB1
1 - RPSB22 - RPSB1
1 - RPSB2N/A
Table 4-22 Cabinet Power, Reserve Power, and Floor Mount Hardware Assemblies 
AssemblyDescriptionFunction
RBTC1A-2M Reserve Power 
Cable - RBDB2 to 
Battery TerminalsTwo cables are required for up to six cabinet systems and three are 
required for seven cabinet reserve power installations (for current 
carrying capacity) when connecting reserve (battery) power to three or 
more cabinets (wall mount). RBDB2 is also required–see “RBDB2” 
below.
A licensed electrician must install this item to retain UL listing and/or 
local electrical code compliance.
PBTC-3M Reserve Power 
Cable - Cabinet 
Power Supply to 
Battery TerminalsOne cable is required for each Cabinet if connecting reserve power to 
one or two cabinets (wall or table mount).
A licensed electrician must install this item to retain UL listing and/or 
local electrical code compliance.
RBDB2  Battery Distribution 
BoxDistributes reserve power when three or more cabinets require reserve 
power (floor or wall mount).
Six RBTC2A-1.5M cables are provided with the RBDB2 distribution box 
to connect up to six DK424 power supplies to the battery distribution 
box. RC7C1A-1.7M is also required for the seventh cabinet.