Kidde VM-1 Technical Reference Manual

Chapter 5: Installation
P/N 3101890-EN • REV 006 • ISS 21JUN18 89
Fiber optics
Use the VM-NOCF Fiber Network Option Module for a fiber optic and combination fiber optic and RS-485
communication path for up to eight VM-1 control panels. See the VM-NOCF Fiber Network Option module
Installation Sheet (P/N 3101783-EN) for installation, wiring, and specifications.
Preliminary field wiring testing
It is recommended that you test all circuits before they are connected to the control panel components. Table 30
indicates the recommended tests and acceptable test results.
Note: Individual devices are not checked as part of these tests. All equipment installed on field circuits must be
individually tested to ensure proper operation when the system running.
Table 30: Field wiring tests
Circuit type
Test
DC notification appliance circuit
1. Measure the resistance between conductors. The circuit resistance
should be infinite if no devices are installed on the circuit. The circuit
resistance should be approximately 15 kΩ when the polarized
notification appliances and the end
-of-
line resistor are correctly installed.
2. Reverse the meter leads. The circuit resistance between conductors
should read approximately 10 Ω to 20 Ω. If the resistanc
e reading is still
approximately the same value when the meter leads are reversed, one
or more polarized devices are installed incorrectly.
3.
Measure the resistance between each conductor and earth ground. The
resistance should be infinite.
Audio notification appliance circuit
1. Measure the resistance between conductors. The circuit resistance
between conductors should be infinite if no devices are installed on the
circuit. The circuit resistance should be approximately 15 kΩ when the
polarized notification appliances and the end
-of-line resistor are
correctly installed.
2. Reverse the meter leads. The circuit resistance between conductors
should still read approximately 15 kΩ.
3. Measure the r
esistance between each conductor and earth ground. The
circuit resistance between a conductors and earth ground should be
infinite.
Signaling line circuits
1. With field wiring disconnected, verify the continuity of each conductor.
Each conductor should measure less than 38 Ω.
2. Measure the resistance between conductors. The circuit resistance
between conductors should be infinite if no devices are connected to
the circuit. The circuit resistance between conductors should be
between approximately 18 kΩ (250 devices) and 4.5 MΩ (1 device)
when devices are installed.
3.
Measure the resistance between each conductor and earth ground. The
circuit resistance between a conductors and earth ground should be
infinite.

Kidde VM-1 Specifications

General

Brand	Kidde
Model	VM-1
Category	Fire Alarms
Language	English