Siemens PSC-12 User manual

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P/N 315-099321-7
Model PSC-12
Installation Instructions
Figure 1
PSC-12 12 Amp Power Supply
INTRODUCTION The Model PSC-12 from Siemens Industry, Inc. is a high current power supply that
provides the system with primary regulated 24VDC. It is rated at 12A and has a built-
in charger that is capable of charg-
ing up to 100AH batteries. It also
has a microprocessor-controlled
transfer circuit that allows the PSC-
12 to switch the system power to
stand-by batteries during loss or
reduction of the AC power.
The PSC-12 incorporates an 18A
circuit breaker on the battery input.
It provides terminal tie points for
system signals.
The PSC-12 mounts at the back of
the enclosure of the COM-1 and
occupies one location on the studs
in the backbox or on the optional
CAB-MP Mounting Plate.
The PSC-12 has four programmable
relays. The relays can be configured
in the NCC WAN to change state on
a global alarm, a global trouble or on a manual request (general output).
Features The PSC-12 features are as follows:
• Universal AC power input 120VAC-240VAC @60Hz / 50Hz
• Off-line Switch Mode Power Converter
• Power Factor Correction
• Built-in Battery Charger
• Total Output power of 12A@24VDC
• Two separate power output terminals: one power limited terminal with 4A
max @ 24VDC capacity and one non-power limited terminal with 12A max
@ 24VDC capacity (total not to exceed 12A)
• Both output terminals have current measurement capability
• Auto resettable current protection circuits for overload and short circuit
• Access to CC-5 System bus
12 Amp Power Supply for NCCNT WAN

Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-72
• Supplies 6.2VDC @ 2A (power limited) to the system bus
• Supplies 24VDC @ 2A (power limited) to the system bus (subject to a 12A
total current limit)
• Communicates via HNET protocol
• Four programmable relays with 2A ratings
OPERATION The PSC-12 occupies one network address in the HNET network and has four functional
components: the Controller, the Charger, the Power Supply and the Interface Board.
The Controller determines the activation of the Charger and monitors the status of
the Power Supply (ground fault conditions, loss of network communication, 24VDC
terminal overload and the status of the battery).
The Power Supply has an Offline switch mode power converter and power factor
correction circuit to improve conductive RF emission at low frequency. It is designed
to take voltage inputs of 120VAC-240VAC at 50Hz/60Hz and has one resettable
circuit breaker that can also be used as a battery power switch.
The Charger monitors and maintains the battery. This circuitry utilizes three charge
modes, depending upon the state of the batteries: Bulk (Full) Charge State, Trickle
Charge State and Float (maintenance) State. The Charger monitors the batteries and
determines which of the charging modes to activate. It also has the capability to
check the state of the battery through diagnostic testing.
Terminal Blocks, The PSC-12 has one reset switch, seven LEDs, three address switches, one circuit
breaker, four terminal blocks, four terminal connections and two 60 pin flat ribbon
connections as shown in Figure 2.
A reset switch is located on the top of the front panel. Pushing the reset switch re-
initializes the PSC-12 operation.
The LEDs located at the top left of the module are defined as follows:
POWER - (Green or Blue) Normally ON. When illuminated, indicates
that the PSC-12 is powered from the AC
mains. When flashing, indicates that the
PSC-12 is powered from the battery.
MODULE FAIL - (Yellow) Normally OFF. When illuminated indicates
that the module microprocessor has failed.
CAN FAIL - (Yellow) Normally OFF. Not used in this applica-
tion.
HNET FAIL - (Yellow) Normally OFF. When illuminated, indicates
that the HNET communication with the
PSC-12 has terminated and the card goes
to degrade mode (applicable only when
the card resides in the HNET network).
GND FAULT - (Yellow) Normally OFF. When illuminated, indi-
cates that the PSC-12 has detected
either a negative or positive ground fault
on its outputs.
Controls and Indicators

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Building Technologies Division
P/N 315-099321-73
24V 12A FAIL- (Yellow) Normally OFF. When illuminated, indicates
that the 24VDC non-power limited output
has a trouble condition or the PSC-12 has
disconnected the 24VDC output due to
current overload or short circuit.
24V 4A FAIL - (Yellow) Normally OFF. When illuminated, indi-
cates that the 24VDC power limited
output has a trouble condition or the
PSC-12 has disconnected the 24VDC
power output due to current overload or
short circuit.
Three rotary dial switches located directly below the LEDs are used to set
the HNET network address of the PSC-12.
The terminal blocks of the PSC-12 are defined as follows (refer to Figure 2):
TB1 Currently NOT USED.
TB2 Relay Outputs. Four user-programmable relays that are set to
NOT USED by default.These outputs are rated 2A @ 30VDC/
120VAC (.6PF). (Refer to Figure 3 for wiring the relays.)
These relays are controlled by the NCC WAN only. NCC WAN
version 6.01.007 or higher is required. The relays can be config-
ured in the NCC WAN as Global Alarm, Global Trouble or
General Output.
A relay configured as Global Alarm changes the respective PSC
relay state to off normal when there is any alarm on the NCC.
When all alarms are cleared on the NCC, the relay state will
restore to normal.
A relay configured as Global Trouble changes the respective
PSC relay state to off normal when there is any trouble on the
NCC. When all troubles are cleared on the NCC, the relay state
will restore to normal.
A relay configured as General Output will change state only
through a manual command from the NCC, using either the
Device Output Control or using the Disable/Enable (DIS/ENA)
and Energize/DeEnergize (ENE/DEE) manual commands.
Figure 2
Terminal Blocks, Controls and Indicators
GND FAULT
24V 12A FAIL
24V 4A FAIL
MODULE FAIL
HNET FAIL
CAN FAIL
RESET
POWER
PSC-12
P5
11
19
1
1
+
+
+
_
_
_
2
2
H
N
GND
6
24
12
18
7
13
12
34
TB1
TB2
BATTERY
P9 P12
TB3
TB4
P4
AC
CONNECTION
(INPUT)
NON- POWER
LIMITED OUTPUT
(24VDC @ 12A Max.)
REGULATED
RELAY OUTPUTS
2A @ 30VDC/
120VAC (.6PF)
BATTERY
CONNECTION
TO PSX-12
OR CC-5
CIRCUIT
BREAKER
TO PSX-12
OR CC-5
BATTERY
THERMISTOR
DO NOT
USE
DO NOT
USE
DO NOT
USE
DO NOT
USE
DO NOT
USE
OFF
O—
ON
P10
GROUND
FAULT
SUPERVISION
HNET/CAN
NOTE:
Positive and negative
ground fault datected at: <60K
ohms for TB4 terminals 1,2.
19 24
18
13
TB2
NO
NO
NO
NO
NC
NC
NC
NC
C
C
C
C
PROGRAMMABLE
USER
RELAY 2
OUTPUT
USER
RELAY 1
OUTPUT
USER
RELAY 4
OUTPUT
USER
RELAY 3
OUTPUT
PROGRAMMABLE
Figure 3
TB2 Wiring Diagram

Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-74
TB3 Currently NOT USED.
TB4 24VDC Non-Power Limited Output Terminal. This terminal is non-power
limited and can supply up to 12A. When the current draw is exceeded, it
shuts down, lights its associated LED and sends a fault condition to the
NCCNT WAN.
This output is normally connected to the input terminals of the CC-5.
This output must remain within the enclosure or within 20 feet in rigid
conduit. All wiring must be in accordance with Article 760 of NEC or
local building codes. (See Figure 2.)
Output Voltage: 24VDC +10%, -15%
Output Current: 12A max
TB4-1: (+) terminal
TB4-2: (-) terminal
The total cumulative sum of the 24VDC output (power limited + non-power limited)
must not exceed 12A. Over current draw will initiate a PSC-12 shut down.
The main AC power line must be turned OFF prior to installation.
P4 Currently NOT USED. P4 contains a factory installed plug. Do not
remove the plug from P4.
P5 Currently NOT USED.
P9 Connects the back-up battery to the PSC-12. Battery size has to be
calculated to ensure that the battery size can support the system load
during battery back-up condition. Refer to the Battery Calculation form to
determine the required battery size of the system.
P10 Set the jumper on P10 to ENABLE (left hand) position to enable ground
fault protection.
Always apply AC power first followed by the battery.
P12 AC input connector from the PTB, terminals P4 or P5.
60-pin Connects the PSC-12 to the system. It is a straight-through connection
between the two connectors and provides the 24VDC rated at 2A and
6.2VDC rated at 2A that powers the CC-5 modules. It also contains all
the communication signals and system signal bus that is necessary for
the proper operation of the system.
These connectors are power limited. If the PSC-12 is located in a
different mounting plate in the enclosure, an optional extended ribbon
cable, Model BCL (P/N 500-633997) must be used.
Input Voltages: 24VDC, 6.2VDC
Max Current : 2A @ 24VDC
2A @ 6.2VDC

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Building Technologies Division
P/N 315-099321-75
PRE-INSTALLATION The PSC-12 installation kit has the following components:
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The following part is optional:
• If the PSC-12 is not located in the same row in the backbox (or on the same
optional CAB-MP) as the CC-5, an extended 60 pin flat ribbon cable, Model
BCL (P/N 500-633997), is required.
The following components must be set prior installing the module in the enclosure:
Verify that the dedicated circuit breaker for the PSC-12 is turned OFF at the mains.
•Battery Circuit Breaker: Set this circuit breaker to the OFF position.
•Network Address Switch: Set the three-digit HNET network address for
the PSC-12 using the three rotary dial address switches located below the
LEDs on the front panel. (Refer to Figure 2 for the location of the switches.)
The address for the PSC-12 must be the same as the address selected for it
in the Zeus Programming Tool. To set the address, turn the pointers on each
of the three dials to the numbers for the selected address. For example, if
the address is 123, set the pointer for the HUNDREDS dial to “1”, set the
pointer for the TENS dial to “2”, and set the pointer for the ONES dial to “3”.
The range of allowable addresses is from 001 to 251 (leading zeros must be
used).
INSTALLATION
Remove all system power before installation, first battery then AC. (To power up,
connect the AC first, then the battery.)
The PSC-12 mounts on studs in the backbox or on the optional Mounting Plate
(CAB-MP).The Mounting Plate may be located either “IN” or “OUT” of the enclosure
to perform this installation procedure. If the Mounting Plate is located “IN” the
enclosure you will have to gain access to it by opening the enclosure Inner and Outer
doors. If the Mounting Plate is located outside of the enclosure, place it in front of
you so that the word “TOP” is at the top and away from you.

Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-76
The PSC-12 can occupy any
position in a row in the
backbox or on the mounting
plate, but it should be in-
stalled in the row and position
that is located directly above
the PTB to which it is con-
nected. (Refer to Figures 4
and 6). When the PSC-12 is
mounted correctly on the
optional Mounting Plate it will
be flush on the top, bottom,
and right with the Mounting
Plate and the mounting
screw holes of the PSC-12
will align with the threaded
posts.
1. Install four 10-32 screws
in the threaded posts at
the mounting position.
Screw each of the 10-32
screws into the threaded
posts 5-6 turns.
2. Place the PSC-12 over
the four screws on the
Mounting Plate and slide
it down or towards you
to rest on the four
screws. (Refer to Figure
5.) When the PSC-12 is
in the correct position it
will be flush with the
top, bottom and right
side of the Mounting
Plate.
3. Tighten the four screws.
TOP
TOP THREADED POSTS
BOTTOM THREADED POSTS
POSITION 1 POSITION 3 POSITION 4
POSITION 2
POSITION 1 POSITION 3 POSITION 4
POSITION 2
CAB-MP
Figure 4
Location Of The PSC-12 On The Optional CAB-MP
TOP
SLIDE DOWN UNTIL
FLUSH ON TOP,
RIGHT, AND BOTTOM
CAB-MP PSC-12
Figure 5
Mounting The PSC-12 On The Optional CAB-MP

Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-77
WIRING The PSC-12 has removable terminal blocks and connectors at the top and bottom of
the module. The terminals and connectors at the top of the PSC-12 are power
limited.The terminals and connectors at the bottom of the PSC-12 are non-power
limited. (Refer to Figure 6.)
Use a separate or dedicated circuit breaker and run the earth ground from a suitable
source to the PSC-12. Check local requirements.
Conduit is not an acceptable Earth Ground Conductor.
Wire in accordance with local codes and Article 760 of the NEC, NFPA latest edition.
In compliance with NEC, all power limited fire protective signaling conductors must
be separated a minimum of a 1/4" from all of the following wiring located within a
control panel:
• Electric light
•Power
• Class 1 or non-power limited fire protective signaling conductor
Refer to the CAB2-BB Installation Instructions, P/N 315-033009-1 for wiring require-
ments to comply with NEC codes.
Figure 6
PSC-12 Wiring In The CAB Enclosures

Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-78
Battery Connections When BTX-1, BTX-2 or BTX-3 batteries are required, connect them to the system
with the Battery Cable Conversion Kit, P/N 545-634222, following the steps listed
below. (Refer to Figure 7.)
1. Using the 12 in. long wire assembly, connect the two batteries together, as
shown in Figure 6. Secure each end of the assembly to the battery with a
10-32 x 3/4” screw and lock nut.
2. Attach the quick disconnects to the positive and negative battery terminals
with the 10-32 x 3/4” screws and lock nuts supplied.
3. Attach the red battery wire to the quick disconnect on the positive terminal
and the black battery wire to the quick disconnect on the negative terminal.
BTX-1, BTX-2 OR BTX-3
BATTERIES
10-32 X 3/4”
SCREWS
(4 PLACES)
12 IN. LONG
WIRE ASSEMBLY
LOCK NUT
(4 PLACES)
QUICK
DISCONNECT
(2 PLACES)
Figure 7
Wiring BTX-1/-2/-3 Batteries To The PSC-12
Power Supply Load Calculations
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Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-79
To ensure that the PSC-12 power supply is not overloaded, use the form and follow
the procedure listed below.
1. Enter the quantity of each card/module in the enclosure.
2. Calculate both the 24VDC and 6.2VDC loads for each row.
3. Total the Active 24VDC and Active 6.2VDC columns.
4. Ensure that both totals are within the power supply output ratings.
Battery Power Make sure that the battery circuit breaker is in the OFF position.
Use either 14 or 12 AWG for battery connection.
Battery backup is required for compliance to UL864. The PSC-12 can charge a battery
up to 100 amp hours. (15 amp hours is the minimum size for the PSC-12.) To deter-
mine the battery size, use the form and follow the procedure listed below.
To determine the battery size, add current supplied to all devices connected to
PSX-12 Power Supply Extenders.
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1. Record quantities of all required cards and modules.
2. Calculate each row across and place the total in the last column: Total
Standby 24VDC Module Current.
3. Total the last column and record it at the bottom of the form in the space
labeled Total System Current.
4. For NFPA 72 Proprietary and UL 1076 systems, multiply the total system
current by 24 and record it at that Total AH location.
5. Multiply the AHTotal by 1.3 to obtain the final battery amp hour capacity and
record it opposite Battery Size.

Siemens Industry, Inc.
Building Technologies Division
P/N 315-099321-710
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These battery models are UL listed for use with the system:
• BP-61—24V, 15 AH
• BTX-1—a set of 12V, 31 AH
• BTX-2—a set of 12V, 75 AH
• BTX-3—a set of 12V, 100AH
Select the battery that meets or exceeds the final calculated battery amp hour rating.
Use an external battery box, Model CAB-BATT from Siemens Industry, Inc. (P/N 500-
633917) with the BTX-2 and BTX-3 models.
Battery System Electrical Rating:
Input Voltage: 24VDC +10%, -15%
Input Current: 15A max.
Minimum Battery size: 15AH
Maximum Battery size : 100AH
Battery Max Charge Current: 5A (full charge mode)
SPARE EQUIPMENT A minimum of one spare PSC-12 per NCCNT WAN system is recommended.
ELECTRICAL RATINGS