Bacharach MGS-400, Руководство пользователя

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1100-2294 Rev 1 19
3.4.3 Relay Wiring
WARNING: Relays are rated for 0 to 30V AC/DC. DO NOT apply mains power
onto these relays.
1. Locate the relevant connections (Relay 1, Relay 2, Relay 3) and remove the terminal
block from the PCBA.
Relay Function
1 Low Alarm
2 High Alarm
3 Fault Alarm
2. Remove plugs from the corresponding M16 cable glands.
3. Using the appropriate cable glands, insert wires into the enclosure.
4. Secure the wires in each terminal block and, pressing firmly, reinstall the terminal block
into the PCBA.
5. Remove all excess cable from the housing before securing the cable glands.
When configured according to the factory default settings, the relays are de-energized during
normal operation
(not fail-safe) . Fail-safe mode can be configured. When configured for fail-safe
operation, relays are energized during normal operation. Fail-safe operation ensures relays are
triggered in cases of power failure at the instrument. In failsafe operation normally open and
normally closed terminals are reversed as indicated by the following table:
Terminal Normal operation Failsafe Operation
NC Normally Closed Normally Open
COM Common Common
NO Normally Open Normally Closed
3.4.4 Installation of Remote Sensing Head
IMPORTANT: Non standard cable lengths less than 5 meters may be used.
Where non standard remote cables are used these must be shielded to comply
with EMI regulations.
IMPORTANT: Remote sensor is automatically recognized and registered by the
instrument after a power cycle.