Teledyne HASTINGS 2002, Instruction Manual, Page: 33 / 49

page 33
Relay Interface Optoion Board
SECTION 7
The relay interface board is available as an option for the Model 2002. The relay board allows the
TTL logic setpoints (High, Low) to directly control two SPDT relays. Whenever the setpoint
indicator light in the front panel is lit, the corresponding relay is energized. The relay contacts are
rated for a maximum switching current of 250VA (resistive load). Connection to the relay contacts
is made via a terminal strip mounted through the rear panel of the Model 2002.
7.1 Relay Board Specifications
Each relay board consists of 2 Form C (SPDT) relays with the contacts wired in parallel.
Max. switching power --------------------------------------------------------------------- 120W, 250VA
(2A @ 125VAC, 1A @ 250VAC)
Max. switching voltage -------------------------------------------------------------- 220VDC, 250VAC
Max. switching current ---------------------------------------------------------------------- 4A DC, AC
Max . carrying current ---------------------------------------------------------------------- 6A DC, AC
UL/CSA rating ------------------------------------------------------------------------- 1.2A @ 125VAC
1.2A @ 110VDC
4.0A @ 30VDC
Terminal strip is designed for wire from 22 AWG through 12 AWG.
7.2 Terminal Strip Connections
Pin Connection
1 Common (High)
2 NC (High)
3 NO (High)
4 Common (Low)
5 NC (Low)
6 NO (Low)
The Terminal strip is numbered one through six as shown in Figure 7-1.
Figure 7.1
1 2 3 4 5 6