Precision Digital PD570 - Manual (Page 9)

Relay Outputs
RATINGS Out1: 250 VAC @ 3 A or 30 VDC @ 3 A (resistive load)
Alarm: 250 VAC @ 1 A or 30 VDC @ 1 A (resistive load)
ELECTRICAL NOISE A suppressor (snubber) should be connected to each
SUPPRESSION relay contact switching inductive loads, to prevent
disruption to the microprocessor's operation.
Recommended suppressor value: 0.1
μF/470 Ω,
250 VAC (PDX6901)
DEADBAND For alarm operations, 0-100% of full scale, user selectable
HIGH OR LOW User may program the alarm relay for high or low trip point
ALARM
DEVIATION ALARM User may program the alarm relay for a high, low, or range
set point deivation alarm.
RELAY OPERATION Out 1, the Limit Control Relay, will activate when the PV
exceeds the limit set point. It will remain in this state until the
PV no longer exceeds the limit set point and the relay is reset
by the user. The alarm relay may be set to any alarm type.
TIME DELAY 0 to 99 minutes 59 seconds alarm trip delay for each alarm.
FAIL-SAFE Programmable
OPERATION Independent for each alarm relay
AUTO INITIALIZATION When power is applied to the controller, alarm relays will
reflect the state of the input to the controller except standby
alarms.
PD570 Series Nova Process and Temperature Limit Controller Instruction Manual
9