Rosslare PS-A25T, PS-A25TU, PS-A25LT, PS-C25T, PS-C25TU Installation Manual

PS-x25T/TU/LT

Intelligent Dual-Relay Secured Power Supply

Installation Manual

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1. Introduction

The PS-x25 family of secured power supplies converts AC power to 12
VDC power limited output (see Section 2) with an integrated battery
charger, designed for use with all of Rosslare's convertible and secure
access controller units (ACU).

The PS-x25 family contains two power supplies, one for the lock
output and the other for the ACU.

This design isolates the lock from the ACU, securing the functionality
of the lock even if the ACU is tampered with.

When a valid code is entered via the ACU, it communicates with the
PS-x25 family using a Rosslare proprietary protocol sending a
command to activate the lock or auxiliary relay.

Similarly, the Release-to-Exit (REX) button is attached directly to the PS­x25 unit.

If the data line between the ACU and the PS-x25 unit is cut, the system
immediately detects that the data line has been tampered with and
generates a one-minute siren and closes the lock output. In addition,
the auxiliary relay can be activated by the ACU.

A sealed lead acid battery charger is built-in to provide backup power
for the ACU and the lock. The PS-x25 can also power an external
speaker to annunciate bell and siren tones.

Figure 1: PS-A25T/TU/LT Figure 2: PS-C25T/TU/LT

2. Technical Specifications

2.1 Electrical Characteristics

PS-A25T* PS-C25T* PS-C25TU

Input

230 VAC, 50 Hz, 0.14 A 16 VAC (25 VA)

x25LT models: 16 to 24 VAC (25 VA)

Internal
Transformer

230/16 VAC, 25 VA N/A

DC Output

DC output: 11.7~13.2 VDC, 1 A max. combined ACU output
and lock power supply

Lock Output

5 A, SPDT relay.
Max Switched current: 5 A
Max Switched voltage: 150 VDC or 300 VAC
UL Rating: 5 A at 30 VDC or 5 A at 125 VAC

Auxiliary
Output

5 A, SPDT relay.
Max Switched current: 5 A
Max Switched voltage: 150 VDC or 300 VAC
UL Rating: 5 A at 30 VDC or 5 A at 125 VAC

Speaker

In casing In casing External

Speaker Output

8 Ohm, 0.25 W (minimum) for bell chime and siren alerts

Space for
Backup Battery

No Yes

Battery Backup

N/A Built-in charger for sealed UL certified 7 Ah

battery lead acid or gel
Maximum charge current 1.2 A
Automatic switch over to stand-by battery when

AC fails

Risk of explosion when battery is
replaced with a wrong battery
type.

Visual Indicators

DC output LED indicator on PCB

Additional
Features

Short circuit and thermal overload protection
Includes battery leads

Communications

Rosslare proprietary protocol

*Model not UL listed

2.2 5BEnvironmental Characteristics

Operating Temperature

-10°C to 50°C (14°F to 122°F)

Operating Humidity

0 to 85% (non-condensing)

2.3 6BPhysical Characteristics

PS-A25T PS-C25T/LT PS-C25TU

Dimensions
(H x W x D)

182 x 80 x 68 mm

(7.2 x 3.1 x 2.7 in.)

225 x 230 x 76 mm

(8.85 x 9.05 x 3.00 in.)

Weight

1.24 kg (2.73 lb) 2.44 kg (5.38 lb) 1.5 kg (3.3 lb)

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3. Installation

The PS-x25 should be installed in accordance with article 760 of the
National Electric Code NFPA 72 as well as applicable local codes.

The circuit breaker m ust be closed to the PS-x25 and must be
accessible.

3.1 Mounting

The PCB mounting holes dimensions for the C-box are provided in
Figure 3.

Figure 3: PCB M ounting Holes Dimensions

3.2 Wiring

Refer to the wiring diagram in Section 4.

To wire the unit:

1. Mount the PS-x25 within the secured perimeter.

2. Connect AC power (16.5 VAC, 60 Hz to the marked terminals, "~

VIN ~". Use a Class 2 transformer such as DSC Part No.
PTC1640U.

Use 18 AWG or larger for all power connections (battery, DC
output).

Ensure that the power-limited circuit is wired separately from the
non-power limited wiring (16.5 VAC, battery)

3. Connect the ACU’s power input to the power terminal marked

[SECURED CONTROLLER +V and (-)]

4. Connect the two lock outputs to the power terminal marked

[LOCK 12VDC N.C or N.O]

5. Connect the auxiliary relay if needed.

6. [OPTIONAL] Connect the battery terminal to power terminal

marked [12V DC +Bat and (-)] (Battery leads included)
A backup battery is optional. When a battery is not used, loss of

AC results in the loss of output voltage. When using a backup
battery, it must be a UL certified "lead acid" or "gel" type.

7. Panic hardware shall not be used with this device.

3.3 Maintenance

For proper operation, the unit should be tested at least once a year.

3.3.1 Output Voltage Test

Check DC output for proper voltage level under normal load
conditions.

3.3.2 Battery Test

Check specified voltage, at both battery terminal and board terminals
marked [12VDC +Bat and (-)] under normal load conditions, verify that
the battery is fully charged and insure there is no break in the battery
connection wires.

Maximum charging current under discharges is 1.2 A .

Expected battery life is 5 years; however, it is recommended to

change batteries in 4 years or less if needed.

Dispose of used batteries according to manufacturers’
instructions.

4. Wiring Diagram