LiquidWatch Installation Manual
9
3 Probe Installation
3.1 UL/CUL LiquidWatch Requirements
The LiquidWatch model LW64-IS is listed by Underwriters Laboratories, Inc. and provides intrinsically
safe output circuits for use in Class 1, Division 1, Groups C and D hazardous locations when used with
probes listed below and installed in accordance with the instruction in this manual.
The probe configurations are:
1. PHL-LW solid-state hydrocarbon sensor and PWS-LW solid-state water or conductive liquid sensor.
2. All PermAlert supplied probes and float switches with an integral LW-PA probe adapter, which
operate as a simple dry contact switch closure.
3. A PermAlert LW-PA probe adapter connected to a customer supplied switch, if the switch operates
as a simple dry contact closure with no external power supplied to the switch. The switch may
operate as normally open or normally closed.
3.2 Probe Configuration
The LiquidWatch alarm panels are designed to monitor up to 64 probes. The 64 probes are organized in
8 banks of 8 probes. The standard alarm unit has probe bank 1 installed within the enclosure (see
Figures 1 and 2). This can monitor probes 1 – 8, connected to terminal strip P1. If additional probes are
monitored, remote probe modules (Model RPM-8) are required. Each RPM-8 has a bank select jumper,
P3 that can be set to bank 2 through bank 8 and will monitor 8 probes as follows (see Figure 5):
Bank Probe Numbers
2 9 - 16
3 17 - 24
4 25 - 32
5 33 - 40
6 41 - 48
7 49 - 56
8 57 - 64
Labels are supplied to place on the circuit board next to the terminal strip P1 to renumber the probe
terminals.
The RPM-8’s are connected with a 15 conductor shielded communication cable. The standard
communication cable supplied by PermAlert has the following color code and is connected to terminal
strip P2, numbered 1 - 16 as follows:
Terminal Pin # Color Function
1 Black Probe #1
2 Not Used Bank #1 Select
3 White Probe #2
4 Red Bank #2 Select
5 Green Probe #3
6 Orange Bank #3 Select
7 Blue Probe #4
8 White/Black Bank #4 Select
9 Red/Black Probe #5
10 Green/Black Bank #5 Select
11 Orange/Black Probe #6
12 Blue/Black Bank #6 Select
13 Black/White Probe #7
14 Red/White Bank #7 Select
15 Green/White Probe #8
16 Blue/White Bank #8 Select
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