ATI
Model F12/D Gas Transmitter
Part 3
– Electrical Connections
23
O&M Manual (Rev-H)
Alarm Relay Boards (Option)
The Alarm Relay board is available in both an AC powered and DC powered version. Each version features three
SPST relays, an external remote alarm reset, and provides power to the transmitter and communication interface.
A 20-conductor ribbon cable connects control signals and power between the transmitter and the relay board. Relay
operation must be enabled through the operator interface.
Signaling on the 20mA current loop, including HART FSK, is still possible by connecting a separate power supply
and current loop receiver to terminals 5 and 6 on the P/S Board.
3.10 AC or 12-30 VDC Powered
The AC powered version requires 115 or 230 VAC at 50-60Hz applied to TB6. DC powered units require
12-30 V between terminals 1 and 2 of TB6.
NOTE: The Voltage selector switch must be set to match the AC power supplied.
The switch is marked with ‘115’ and ‘230’. The unit is configured for 115 VAC when the ‘115’ is visible on
the switch. If the incorrect voltage is shown, simply slide the switch to the other position.
J4a
CONNECTS TO (AUX)
ON FRONT LID
TB3
1 - RL1 Contact NO
2 - RL1 Contact C
3 - RL2 Contact NO
4 - RL2 Contact C
5 - RL3 Contact NC
6 - RL3 Contact C
TB5
8 - Loop Power (-)
7 - Loop Power (+)
6 - Heater Power (+)
5 - Heater Power (-)
4 - Pwr -
3 - Pwr -
2 - Remote Reset
1 - Pwr +
TB6 for AC Operation
(L) - 115/230 VA, 50/60 Hz
(N) - Neutral
(G) - Ground
TB6 for 12-30 VDC Operation
(+) - V+
(-) - V-
(G) - Ground
115
J4a
TB6
G
N
L
RL3
RL2
RL1
2
3
4
5
6
7
1
8
Figure 21 - Powered Alarm Relay Contacts
