Bacharach MGS SERIES User Manual

MGS Series Controller Manual
6709-9000 Rev 1 5
Section 1. Introduction
1.1. Overview
The MGS Series controllers provide local alarm status indications (via
multi-colored, per-channel LEDs) as well as single-level or dual-level
digital (relay) alarm outputs based on 1, 2, 4, or 6 input signals and 1 or
2 user-definable set-points.
1.2. 2-Channel and 6-Channel Models
MGS Controllers support multiple input sensors/transmitters (1, 2, 4, or 6
channels) based on the model of the controller. Inputs are standard 4-20
mA signals from MGS-series sensors or any standard, linear, 4-20 mA
transmitter.
NOTE: The smaller MGS Controller supports up to two input
channels (see Figure 1). The larger controller supports up to
six channels (see Figure 2). The number of alarm LEDs on
your controller will vary based on the flavor of device that is
ordered (see Figure 3).
IMPORTANT: If you are NOT using the maximum number of
available channels (2 for the smaller controller, and 6 for the
larger controller), you must connect a 3300 Ω resistor across
pins 1 and 2 for each unused input channel.
1.3. Alarming
Regardless of the number of channels supported, each controller
contains either 1 or 2 adjustable potentiometers (pots) for setting the
alarm value(s). Single-level alarm controllers contain one pot which sets
the controller’s alarm threshold. Dual-level alarm controllers contain two
pots which are used to set the low-level and high-level alarm thresholds.
As an individual channel’s input signal exceed the controller’s alarm
threshold (set by the programmable pot(s)), the corresponding channel’s
alarm LED is illuminated, allowing a technician to visually inspect the
controller for any alarm conditions on a channel-by-channel basis. Refer
to Figure 3.

Bacharach MGS SERIES Specifications

General

Power Supply	24 VDC
Operating Temperature	-20°C to 50°C
Communication	Modbus RTU
Output	4-20 mA
Enclosure Rating	NEMA 4X