User Manual
17 Signet 8900 Multi-Parameter
6.3 Power Module (3-8900.402-X)
• The 8900 can operate from a Universal AC power input (3-8900.402-1) or from a 24 VDC power input (3-8900.402-2)
• For safety, place the AC ONLY or DC ONLY decal on the rear panel of the 8900.
• Exceeding voltage ratings may damage the unit and pose a shock hazard.
• The DC power module has more power capability than the AC module, and is recommended for systems where the sensor load
exceeds 40 mA.
2
P
MM P
4 3
2
4 3
L
ED
SLD
L
ED
S L
SLD
L
S L
SLD
-
-
P
3
3
-
-
-
3-8900.620
100−240VAC
50−60Hz, 24VA MAX
~
12−24 VDC
0.7 A MAX.
N
L
+
-
Power Connection
DO NOT attempt to connect both
AC and DC at the same time
C
NO
NC
NO
NC
C
Solid State Relays
Rating:
50 mA 30V
Mechanical Relays
Rating:
5A 250 VAC
5A 30 VDC
~
+
-
+
-
~
CAUTION
6.4 Output Module (3-8900.405-X)
The 8900 will support up to four analog outputs.
• Analog outputs 3 & 4 are obtained via these separate plug-in
modules.
• Analog outputs 1 & 2 are located on selected I/O Modules
and are also wired as shown here.
COMM PORT /
OUT 4 OUT 3
+
-
+
-
Active 4 to 20 mA loop wiring
+
-
COMM PORT /
OUT 4 OUT 3
+
-
+
-
Passive 4 to 20 mA loop wiring
12 to 24 VDC
power
+
-
+
-
O 2 O
PO
OMM PO
O 4 O 3
2
4 3
O
O
O
O
O P
3
3
-
-
1
2
3
4
7
8
9
10
11
12
13
14
-
• Active 4 to 20 mA Loop Output Module
The DC power required for the loop is supplied by the 8900.
No additional power source is needed.
• Passive 4 to 20 mA Loop Output Module
The DC power required for the loop must be provided by
an external source.
N
L
-
AC Line
AC Neutral
N
L
-
DC -
DC
AC ONLY
DC ONLY