TSI Instruments FHC50

89
Appendix C
Wiring Information
Back Panel Wiring
PIN #
Input/Output/
Communication
Description
1, 2
Input
24 VAC to power Digital Interface Module (DIM).
3, 4
Output
0 to 10 VDC fume hood exhaust control signal. See menu item
CONTROL SIG
Not used on fume hood monitor.
5, 6
Communications
LONworks
®
/BACnet
®
MS/TP communications (optional)
7, 8, 9
Output
RS-485 communications to building management system (Modbus
®
or N2)
10, 11
Output
0 to 10 VDC/4 to 20 mA analog output signal. See menu item
ANALOG OUT TYPE.
12, 13
Output
Alarm Relay B. See menu items RELAYS OUT and RELAY SEL B.
14, 15
Output
Alarm Relay A. Low face velocity/flow alarm. See menu item RELAYS
OUT.
16, 17
Input
Non-powered input #1. Accepts sash sensor, sash switch, emergency
switch or night setback switch. See menu item INPUT SEL 1.
18, 19
Input
Non-powered input #2. Accepts sash switch, emergency switch or night
setback switch. See menu item INPUT SEL 2.
20, 21
Input
Non-powered input #3. Accepts sash switch, emergency switch or night
setback switch. See menu item INPUT SEL 3.
22, 23
Input
0 to 10 VDC Flow input. See menu item FLOW DEVICE.