Fridgewatch 2100 Controller Mk4
Section 3
Publication 3-58
Issue 1.1 : 01/08
Page 55 of 152
F
UNCTION
T
ERMINALS
R
EMARKS
Auxiliaries Motor Starter Operation
+24 V dc
o
o
o
126
127
128
24 V dc low consumption relay
2
mounted in the
auxiliary starter. Fridgewatch 2100 will energise this
relay to start auxiliaries. A ‘running’ signal should be
returned to Fridgewatch via volt-free contacts in the
starter that close when the auxiliary starts and runs.
If an ‘auxiliaries running’ interlock is not required, link
terminals 126 and 128.
Slide Valve Position Switches on HallScrew
2000 and 2100 Series Compressors
+24 V dc
o
o
o
o
129
130
131
132
Slide valve position reed switches on HallScrew 2100
series compressors. Can also be used with HallScrew
2000 series compressor LVDT slide valve position
switches.
Start or Load Inhibit
+24 V dc
o
o
133
134
Volt-free contact of inhibiting device, for example, an
ammeter, pressure switch or thermostat. Starting or
loading compressor inhibited when contacts are
closed.
From Fridgewatch Auto Controller or System
Controller
Digital Inputs From Fridgewatch Auto Controller or
System Controller: S19 = 0
o
o
o
o
o
o
135
136
137
138
139
140
DO NOT
use terminals 135 and 140.
or From Other Control Device
Digital Inputs From Other Control Device: S19 = 0
Volt-free
contacts
o
o
o
o
o
o
135
136
137
138
139
140
137, with operator setting S14 Run Enable Signal
Required = 1, becomes a run enable signal (contacts
closed) permits Fridgewatch 2100 to start in ‘auto
start/stop’ mode.
or From Another Fridgewatch 2100 or 2000
Controller in Master/Slave Configuration
Digital Inputs From a Master Fridgewatch 2100 or
2000 Controller: S19 = 1
o
o
o
o
o
o
135
136
137
138
139
140
=
=
=
=
=
=
Terminal prefix: 1 = compressor 1, the card positioned in the Fridgewatch 2100 enclosure immediately adjacent to the
mounting board; refer to Fig 4. This prefix does not physically appear on the card.
1
If fitted, depends on the application.
2
Relays must be low consumption type, 40 mA maximum, Omron LY2 or similar (RS Components part number 329-799).
3
Diode type 1N4004
MUST
be fitted. Connect as illustrated in Fig 11 to ensure correct polarity.
4
Load and unload inputs must be pulsed: 1 second on, 1 second off.
Fig 24 (continued) Wiring Connections to 3MIO1 Input/Output Card for Compressor 1
+
Minimum load
50 % load
Maximum load
+24 V dc (link)
Run request
4
Load request
4
Unload request
Run slave request
4
Load slave request
4
Unload slave request
Common
Link
Do not use
Do not use
+24 V dc
Run request
4
Load request
4
Unload request
Auxiliary start
output relay
2
+
Auxiliary
running input
+
Link terminals 135 and 136.
From master if in master/slave
configuration; refer to Fig 14 and Fig 15.
