Section 3
ZGARD C 1-Channel Controller
Installation and Setup
On the main circuit of every ZGARD C
Controller is a series of user configurable
components for setting, adjustment and
selecting the required functionality and
operation of the instrument.
Refer to the
associated controller, Installation Outline
Drawing, 106956 for further details.
Display Mode:
The ZGARD C controller can accept a 4-20mA or RS485 input signal depending on the type of remote
gas sensor employed. If the incoming signal is a 4-20mA analog type, then the controller must be
configured to reflect the actual operating range of the incumbent remote gas sensors.
There are two display mode options, A and B and is selected by placing Jumper H2 in the required
position. If jumper H1-4 is OUT, Range A is selected. If jumper H1-4 is IN, then Range B is selected.
After the display mode is chosen the operating range must be selected. This option is chosen using
Jumper H2 with various jumper positions for the different display operating ranges.
3.1
H2
RANGE A
H2-2 H2-1
RANGE
B
H2-2 H2-1
1
999
OUT
OUT
500
OUT
OUT
2
250 OUT IN
200 OUT IN
100 IN OUT 75 IN
OUT
10.0 IN IN 50 IN IN
H1
PARAMETER
SETUP
1
2
3
RELAY NORMALLY EN/DE (IN/ OUT)
4
DISPLAY RANGE B/A (IN/ OUT)
5
DELAY 5MIN. / POT (IN/ OUT)
6
HORN SOLID / VAR (IN / OUT)
7
WARNING POT / 35% (IN / OUT)
8
ALARM POT / 50% (IN / OUT)
9
ALARM LATCH (IN)