www.miinet.com
Moore Industries-International, Inc.
- 22 -
User’s Manual
224-790-00K
May 2018
Programmable Limit Alarm Trips
SPA
2
SECTION 3
Equipment Ratings
Contact Relays
The SPA
2
does not generate hazardous voltages but can switch outputs up to 5A at up to
250Vac or 30Vdc on its relay contacts. Products connected to the SPA
2
relay terminals should
be designed to receive this type of input.
Analog Output
The SPA
2
does not generate hazardous voltages, it provides a low current 0-20mA output.
Products connected to the SPA
2
Analog Output terminals should be designed to receive this
type of input.
Warning:
If this unit is used in a manner not specified by Moore Industries, the protection provided
by the equipment may be impaired.
Protective Earth Conductor
The Protective Earth Conductor shall be of equal or larger size wire than the other two power conduc-
tors. The Protective Earth Conductor shall be the first conductor connected to the unit when the unit is
being wired. It shall be the last conductor removed when the unit is being
un-wired.
Input/Output Wiring
The Input/Output connections can be made with 14 to 24 AWG (2.5mm
2
to 0.2mm
2
) wire. The end of
each conductor should be stripped no more than 0.25in (7mm). Tighten the screws on the terminal
block to 4.4 - 5.3 lbf/in
2
(0.5 - 0.6 N/m
2
).
Recommended Ground Wiring Practices
Moore Industries recommends the following ground wiring practices:
• Any Moore Industries product in a metal case or housing should be grounded.
• The protective earth conductor must be connected to a system safety earth ground before
making other connections.
• All input signals to, and output signals from, Moore Industries’ products should be wired using
a shielded, twisted pair wiring technique. Shields should be connected to an earth or safety
ground.
• For the best shielding, the shield should be run all the way from the signal source to the
receiving device. (see Note below)
• The maximum length of un-shielded input and output signal wiring should be 2 inches.
Note:
Some of Moore Industries’ instruments can be classified as receivers (IPT2, IPX2, etc.)
and some can be classified as transmitters (TRX, TRY, etc.) while some are both a receiver and
a transmitter (SPA2, HIM, etc). Hence, your shield ground connections should be appropriate for
the type of signal line being shielded. The shield should be grounded at the receiver and not at the
signal source.
