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Technical Specifications and Operational Parameters
Standard Mechanical Relays
Type & Number
Four, Form-C (SPDT) contact sets
Connections
Pluggable 12-pole 5-mm terminal strip, with 4, 3-pole
mating connections
Rating
250 Vac/125 Vdc, 8 A max. 2000 VA/150 W max.
Isolation
4000 Vrms for 1 minute to chassis
Functions
Programmable Load Control, with preset times or via
systems interface
(Selectable)
Fault Failsafe (faulted with power off)
Alarm Failsafe
Out-of-Lock Failsafe
One pulse per hour; contacts closed for one minute at top
of the hour
Other Functions, as required
Optional Solid State Relays
Type
Four, Form-C (SPDT), solid state contact sets
Connections
Pluggable 12-pole 5-mm terminal strip, with 4, 3-pole
mating connections
Rating
240 Volts, 120 mA, 35 Ohms max On Resistance (typical
23 Ohms)
Isolation
3750 Vrms Input/Output
Functions
KYZ Pulse Metering, or any switching function requiring
long life relays that can tolerate 100 mA max ON current
and 23 Ohms resistance.
12.8.4
Event Input Connections
Type
Four, optically-isolated 24
−
240 Vdc (may be configured
for 5-V logic level)
Connections
Pluggable 8-pole 5-mm terminal strip, with 4, 2-pole
mating connectors
Isolation
4000 Vrms for 1 minute to chassis
Resolution
1 microsecond
Types of Events and Triggering Functions
Events are logged by triggers, and in the 1133A are separated into four groups: DSP Triggers, Power
Quality Triggers, System Level Triggers and external. DSP Triggers include any measurement
processed by the DSP that meets a logical condition, such as the frequency changing by 0.1 Hz, or
the line voltage dropping below 110 volts. Power Quality triggers conform specifically to methods