Electrical Connection - COMEM eSDB10 Instruction Manual

Electrical connection

CAUTION
Electrical connections should only be performed by qualified
and skilled personnel trained in the applicable health and safety
regulations of the relevant country.
WARNING
Dangerous electrical voltages!
It is imperative to deactivate the power supply during wiring of
the device.
CAUTION
During the terminal box assembly, use caution not to damage
the OR gasket. If this occurs it must be substituted.
To wire the dehydrating breather, open the terminal box
(Fig.16-17-18/C). An external ground screw is positioned
under the electrical box (Fig.16-17-18/G).
Power voltage
First, connect protective ground externally.
Connect the power voltage (as written on the label on the
terminal box cover) to terminals 31- 32.
Relay
Standard Configuration
There are 2 contact failures:
• 1 x change over contact: POWER FAILURE
(terminal 22-24-21)
- NO contact: terminals 24-21
- NC contact: terminals 21-22
After supply voltage:
- NC contact: terminals 24-21
- NO contact: terminals 21-22
• 1 x change over contact: SYSTEM FAILURE
(terminal 12-14-11)
- NO contact: terminals 14-11
- NC contact: terminals 11-12
Special Configuration:
There is one-contact failures:
• 1 x NC contact: POWER FAILURE (terminal 22-21)
- NC contact: terminals 21-22
After supply voltage:
- NO contact: terminals 21-22
• 1 x change over contact: HEATER ON
(terminal 12-14-11)
- NO contact: terminals 14-11
- NC contact: terminals 11-12
8
SELF-DEHYDRATING BREATHERS eSDB 10/15/30
CAUTION
The alarm relays (contact failure) will not trip the transformer.
Analog Output (optional)
Terminals for analog output 4-20 mA: 41-44.
Digital Output (optional)
Digital output RS485: terminals 3-4.
CAUTION
Close the free cable gland with a plug or gasket if both cable
glands are not used.