Monroe Electronics Electrostatic Fieldmeter - Static Monitor - model 177A - Manual (Page 89)

APNE-0016 88
V. Appendix A – Probe Connection Options
General
Model 1036E or 1036E Probes may be wired to the Model 177A Static Monitor in at least six different
ways. The first 3 options are for non-hazardous (non-classified) locations where there are no Intrinsic
Safety (IS) considerations. The last 3 options are for hazardous (classified) locations where Intrinsic
Safety must be considered as part of the installation.
Option 1: Probes (1036E or 1036F) use factory installed cables; no extension cables; no
Intrinsic Safety considerations
Probes are normally factory equipped with ten-foot-long cables, although longer
or shorter cables are available on special order. To use or test this system,
simply plug the probes into the appropriate connectors on the back of the
Model 177A.
Option 2: Probes (1036E or 1036F) use factory installed cables and factory supplied
extension cables; no Intrinsic Safety considerations
Extension cables are available in lengths up to 1000 feet. The extension cable
part number is 1036/12-nnnn, where nnnn denotes the length of the cable in
feet. Factory supplied extension cables will be labeled with this part number
near one end.
The extension cable female connector mates with the 1036 probe cable male
connector, and the extension cable male connector mates with the female
connector on the back of the Model 177A.
Although it is virtually impossible to err, it is advisable to test the system "on the
bench" before permanently installing long cable runs.
Option 3: 1036E probes with long customer installed cables, with or without extension
cables (factory or customer supplied); no Intrinsic Safety considerations
This option does not apply to 1036F probes, which have permanently attached
cables.
Wiring connections for customer installed 1036E probe cables for use in a
non-IS installation are shown in Figure V-1. Wiring connections for customer
supplied extension cables for use in a non-IS installation are shown in Figure
V-2. Model 1036E probes have terminal blocks inside their housings to which
the cable wires are directly attached.
As in Option 2, it is advisable to "bench test" the system before removing the
factory-attached cables to ensure it is working properly. It is also advisable to
test the system "on the bench" after attaching the customer-installed cables,
with any extension cables, before permanently installing long cable runs.
Option 4: 1036E probes with factory installed cables, extension cables (factory or
customer supplied) and Intrinsic Safety barriers
Refer to drawing 1036/10 [SHT. 2 of 3] in the Model 177A Instruction Manual.
This drawing shows wiring for one channel. Generally, all channels are wired
alike. All barriers (four per channel) may be located in a single barrier
enclosure.
Note that on each side of the barrier enclosure) you have the option of using
connectors or "hard wiring" the cables directly to terminals on each barrier.
Hard wiring allows the cables to be pulled through conduit without interference
associated with connectors. Model 1036E probes have terminal blocks inside
their housings to which the cable wires are directly attached. Wiring details for
customer supplied extension cables are shown in Figure V-2.
As in the previous options, it is advisable to test the system "on the bench" after
attaching the customer installed cables, with any extension cables, before
permanently installing long cable runs.