Detcon 1000 - Manual (Page 12)

Mdl 1000 H2S E-Chem / Inst. Air
Model 1000 H2S E-Chem w Instrument Air Rev. 1.1 Page 8 of 28
AIR FLOW SAMPLE FLOW
+ + 24VDC OUT
2.1A 18-36
VDC IN
+ +
24VDC
OUT
2.1A
18-36
VDC
IN
+ +
24VDC
OUT
2.1A
18-36
VDC
IN
4-20mA, RS485,
Alarm/Fault Sensor Relays
Low Flow Air/ Sample Relays
(Optional)
117VAC / 24VDC In
Customer Connections
+24VDC
-24VDC
(Ground)
INPUT
+
-
Figure 9 Installation Wiring Connections
1. For AC powered unit connect 117/220VAC to the terminal connector labeled “VAC IN” (JP8A) inside the
explosion-proof enclosure on the upper right. If applicable, connect 24VDC to the Terminal Connector
Board labeled “VDC IN” (JP7A). (Figure 9)
2. The 4-20mA and/or RS-485 signal outputs should be wired from the terminal PCB and then out the right
side of the “Power Supply” explosion-proof enclosure. (Figure 9).
3. Discrete alarm relay contacts are provided for three alarms: Fault, Low and High. The contacts consist of
common and choice of normally open or normally closed. Contact output selections are jumper
programmable on the sensor connector board. See DM-624 wiring diagram for details. These connections
also should be wired out of the right side of the “Power Supply” explosion-proof enclosure. (Figure 9).