Inches. secure module to box as shown in figure 4 – System Sensor 2W-MOD2 User Manual

Page 2

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Wiring Diagram
Install module wiring in accordance with appropriate wir-
ing diagrams (Figures 5 - 7). Reset is performed through
power inputs 1 and 2.

Figure 5. The Module Wiring: maintenance signal is

sent to a separate zone.

Control Panel

2W-MOD2

Aux. or

Smoke

Power

Fire Zone

Trouble Zone

Panel EOL

Panel EOL

12

11

10

9

8

7

1

2

3

4

5

6

Loop Style D wiring

3.9 K

EOL (must not be

used for Style D)

A2143-10

+

+

Two-wire listed smoke

detectors. Do not mix

models on the same loop.
Only one 2WTR–B per loop.
Only one 2WTA–B per loop,

unless used with the RRS–MOD.

ALL CIRCUITS ARE SUPERVISED

AND MUST BE POWER LIMITED.

S0232-01

Figure 6. The Module Wiring: maintenance signal is

indicated at the panel as a fire trouble.

Control Panel

2W-MOD2

Aux. or

Smoke

Power

Fire Zone

Panel EOL

12

11

10

9

8

7

1

2

3

4

5

6

+

Loop Style D wiring

ALL CIRCUITS ARE SUPERVISED

AND MUST BE POWER LIMITED.

Two-wire listed smoke

detectors. Do not mix

models on the same loop.
Only one 2WTR–B per loop.
Only one 2WTA–B per loop,

unless used with the RRS–MOD.

3.9 K

EOL (must not be

used for Style D)

A2143-10

+

S0233-01

Figure 7. The Module Wiring: two-wire detectors to

four-wire panel conversion.

Control Panel

2W-MOD2

Aux. or

Smoke

Power

Fire Zone

12

11

10

9

8

7

1

2

3

4

5

6

+

Panel EOL

Loop Style D wiring

3.9 K

EOL (must not be

used for Style D)

A2143-10

+

Two-wire listed smoke

detectors. Do not mix

models on the same loop.
Only one 2WTR–B per loop.
Only one 2WTA–B per loop,

unless used with the RRS–MOD.

ALL CIRCUITS ARE SUPERVISED

AND MUST BE POWER LIMITED.

S0234-01

For NFPA loop Style D wiring the EOL resistor is provided
internal to the module. An external EOL resistor must
not be connected at the last detector on the loop (see Fig-
ures 5 – 7).
Compatibility Requirements
The 2W-MOD2 is marked with a compatibility/zone identi-
fier as the last digit of a 5 digit code on the back of the unit.
To ensure proper operation, this module shall be connected
to compatible two-wire smoke detectors or the alarm con-
tacts of four–wire i3 series detectors only. (Consult System
Sensor’s 2-wire compatibility guide).
Figure 4. Mounting module

Mounting
Install in a dry indoor location. The 2W-MOD2 Mainte-
nance Module mounts directly to 4 inch square electrical
boxes (supplied by installer). The box must have a mini-
mum depth of 2

1

/

8

inches. Secure module to box as shown

in Figure 4.

D500-46-00

2

I56-2174-004

S0235-00

S0237-00

S0238-00

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