Det-Tronics EQP Fire and Gas Detection/Releasing System - Manual (Page 45)

14.1 3-26 95-8533
MEASURING BATTERY vOLTAGE AND CHARGING
CURRENT
Measure the battery voltage at terminals 3 and 4 of
terminal block J2. See Figure 3-18 and 3-22.
To measure the battery charging current, connect a
digital voltmeter to terminals 1 and 2 of terminal block
J2. The voltmeter will read 1 millivolt (0.001 volt) for each
2 amperes of current.
Current in Amperes = Meter reading in millivolts x 2
Example: A reading of 50 millivolts indicates a charging
current of 100 amperes.
EQP2XX0PS(–X) POWER SUPPLIES
AND REDUNDANCY MODULE
INSTALLATION
WARNINg!
ALWAYS follow all safety notes and instructions
when installing power supply or module!
WARNING!
Make sure a.c. power is OFF at main a.c. breaker
before beginning power supply installation!
IMPORTANT!
Power supplies require unrestricted air flow for
proper cooling.
MOUNTING
Mount the power supply and Redundancy Module in a
Nationally Recognized Test Laboratory (NRTL) labeled
enclosure. Refer to the “Specifications” section for
mounting dimensions. Refer to power supply and
module manufacturer's instruction manual provided with
support documentation received with the EQP system
for additional installation details and instructions.
WIRING
CAUTION!
The power supply should be properly connected to
an earth ground! A ground wire MUST be connected
to the power supply units’s ground terminal!
1. Connect external wiring to the appropriate points
on Power Supplies.
Refer to Figure 3-23A for terminal locations for
EQP21X0PS(-X).
Refer to Figure 3-23B for terminal locations for
EQP2410PS(-P) Converter.
Refer to Figure 3-23C for terminal locations for
EQP2120PS(-X) with EQP2410PS(-P) Converter.
2. Connect the 24 VDC output to the Redundancy
Module. (Redundant “+” and “–” power supply
terminals are connected internally.)
A1952
1
2
3
4
CURRENT SENSE +
BATTERY +
CURRENT SENSE –
BATTERY –
Figure 3-22—J2: Battery Test Points