Figure 3 - Main Power Connections
Wiring Instructions
4
Section 4.3 - Connecting Alarms
The DP606A/DP612A Series includes SPDT mechanical relays with internal
snubbers on the normally open contact side. When powered and not in an alarm
state the relays are Energized and the NO contact is connected to the Relay
common contact. If an alarm condition occurs or if the unit loses power the relay is
deenergized and the NC contact is connected to the Relay common contact.
NC
L
ALM1
NO C
(+)
N(-)
NC
ALM2
NO C
19
Fuse
Fuse
Load
Load
WARNING: For the low-voltage power option, maintain the same degree of
protection as the standard high-voltage input power units (90–240 Vac) by using a
Safety Agency Approved DC or AC source with the same Overvoltage Category and
pollution degree as the standard AC unit (90–300 Vac).
The Safety European Standard EN61010-1 for measurement, control, and laboratory
equipment requires that fuses must be specified based on IEC127. This standard
specifies the letter code “T” for a Time-lag fuse.
6
Figure 4 - Relay Connections
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