Finish Installation - Emerson MRLDS-250 Installation And Operation Manual

Figure 3-5 Sample Relay Output Wiring
NOTE: The relay can be programmed to be
failsafe (normally energized). By default, the
relay is set to be normally de-energized. This
can be set using parameter P-06.
Make relay connections (NO, NC, or both) using
18 to 20 AWG wires to terminal block positions 10,
11, and 12 (see Figure 3-5), noting normally open,
normally closed, and common connectors.
Function Pin
Relay (Alarm) 10
Output 11
12
Table 3-3 Relay Output Terminal Block Connections

3.5. Finish Installation

Once the base is mounted and all wiring is
complete, align the gas detector housing and press it
onto the base. The gas detector will snap into position,
completing all electrical connections. Ensure the top
and bottom snap locks are engaged.
CAUTION: If the right cable gland was not
needed during installation and wiring, be sure
to install the blanking plug.
Finish Installation
Mounting Procedure
Relay NC contact
Relay common contact
Relay NO contact
CAUTION: Do not apply caulking or other
material around the gas detector base. The gas
detector relies on air exchange through the
spaces between the base and the gas detector
housing. Do not obstruct the small gap around the
housing and the base with any material.
Wiring and Configuration • 9