Alarm Wiring Connections; Table 4: Sensor Guards; Table 5: Alarm Relay Contacts; Table 6: Alarm Relay Terminations - General Monitors 580A Instruction Manual

PART NUMBER
1800822
10395-1
10110-1
CAUTION: Always mount sensors pointing downward, so that water does not
accumulate on the sensor head. Mounting must be as free from shock and
vibration as possible, and should be convenient for calibration checks in
place. The sensor housing must never be opened when the power is on
otherwise; the explosion-proof integrity of the sensor assembly is
compromised. The threads on the housing lid must be fully engaged.
2.7

Alarm Wiring Connections

The low and high alarm contacts for customer use are DPDT (double pole, double throw),
and are rated 4 amps at 115 VAC, resistive. The fault alarm contact is SPDT (single pole,
double throw), 4 amps at 115 VAC, resistive. These contacts are brought out to terminals
on the rear of the controller as follows.
ALARM RELAY
Fault
Low Alarm
High Alarm
The above chart shows the high and low alarm contacts in the standard de-energized
state (with power applied). These two alarm relays are normally de-energized unless
specially ordered for normally energized operation. The fault relay is always supplied
normally energized.
If normally energized, the terminations are:
ALARM RELAY
Fault
Low Alarm
High Alarm
For more information, see Section 7.10.
SENSOR GUARDS
DESCRIPTION
DUST GUARD
SPLASH GUARD
DUST GUARD WITH DISPOSABLE SCREEN

Table 4: Sensor Guards

CONTACT CONDITION
OPEN COM
4 C
2,3 C
2,3 C

Table 5: Alarm Relay Contacts

CONTACT CONDITION
OPEN COM
4 C
1,4 C
1,4 C

Table 6: Alarm Relay Terminations

13
Model 580A
CLOSED
3
1,4
1,4
CLOSED
3
2,3
2,3