ATI
PQ45P pH System
Part 5
– Operation
15
O&M Manual
Rev-B (7/15)
4.3
Voltage Outputs
There are two analog voltage outputs on the battery board with a terminal strip located in the
lower right corner. The outputs are 0-2.5 VDC and may be used to send isolated data the
optional PQ45 data logger or to remotely located recorders, PLC’s, etc. Output #1 is used only for
pH, and Output #2 can be used for either temperature or pH. Output 2 can also be set for pH if 2
outputs for pH are needed.
4.4
External Power
PQ45 monitors can be powered from external DC supplies. This type of power requires that units
be purchased with the optional external connector and mating adapter cable. This cable is used
to run external DC power (5-17 VDC) into the unit, and can also be configured to carry the analog
output voltage signals to external devices.
4.5
Data logger Module
For local data recording using the two voltage outputs, the optional data logger is mounted on the
PQ45 front panel below the monitor display unit. Interface cables are factory wired to the logger
with plugs that easily disconnect when removing the logger for downloads.
For the interface cables, the white lead from the plug connects to (+) and the outer braid connects
to (-). The 0
– 2.5 VDC signals from the Q45 are designed to exactly match the input requirement
for the data logger module. Once connected, Output #1 and #2 signals are sent directly into the
data logger module. The logger is held in place with two screw clips. For downloading of
data
contained on the data logger module, the module can be quickly removed (and swapped if
necessary.) The data-loaded module can be brought to a PC for
easy recovery of data, without
the requirement of having to bring a PC to the Q45 installation.
Figure 9 - Battery Board Connection
(REAR OF ENCLOSURE)
DC BATTERY BOARD
POWER CABLE
(FRONT OF ENCLOSURE)
Q45 TRANSMITTER
