Ametek Land U1 1100/2900F, User Manual

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Page 23
User Guide Thermometer
Notes on DPU interconnections (Fig. 18)
‘ To indicator ’
The indicator must have a ‘floating’ input i.e. a differential or isolated
input.
‘ Reset control ’
The reset control must be electrically isolated from the indicator.
When used with an UNO, only the connections shown in Fig. 18 must
be made to the DPU. Do not make any other connections to the DPU.
DPU Pin Nº Cable Colour Function
UNO to DPU
connections
1 Yellow 4 to 20mA linear temperature signal drive
2 Blue 4 to 20mA linear temperature signal return
3 White CMD (Command) input
4 Screen Screen
5 Red
23 to 48V, <200mA, dc power (positive)
6 Black 23 to 48V, <200mA, dc power (negative)
7 Green CMD (Command) input
8 N/C No connection
External connections
to DPU
9 Brown/Red AC Mains Live
10 Black/Blue AC Mains Neutral
11 White CMD (Command) input*
12 Green CMD (Command) input*
13 Screen Screen
14 Yellow 4 to 20mA linear temperature signal drive
15 Blue 4 to 20mA linear temperature signal return
16 N/C No connection
Notes
Recommended output load resistance: 100 W
Maximum output load resistance: 400
W
*CMD (Command) input: Voltage-free switch closure
Switch open = PEAK PICK
Switch closed = TRACK (or RESET)
Fig. 19 UNO to DPU interconnection schedule